Release Bulletin digital DIAGNOST Rel. 1.2 - Online … · release bulletin digital DIAGNOST SERVICE MANUAL - UNIT Release Bulletin digital DIAGNOST Rel. 1.2.3 Author: J. Röhling

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Release Bulletin digital DIAGNOST Rel. 1.2.3

FILING INSTRUCTIONS File this documentation in binder: SUBSYSTEM manual digital DIAGNOST workstation

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4512 984 24653 REV AA © 2002 Philips Medical Systems 0.5 Unit_ReleaseBulletin_DIDI_div05.doc ALL RIGHTS RESERVED

H

Philips Medical Systems DMC GmbH SERVICE MANUAL 712 UNIT

Release Bulletin digital DIAGNOST Rel. 1.2.3

(17.7.2002)

DMC Hamburg

Printed in Hamburg, Germany © 2002 Philips Medical Systems

ALL RIGHTS RESERVED

4512 984 24653 REV AA 1 Unit_ReleaseBulletin_DIDI_a020_BW.doc

release bulletin digital DIAGNOST

SERVICE MANUAL - UNIT

Release Bulletin digital DIAGNOST Rel. 1.2.3 Author: J. Röhling

In case there are any questions concerning this manual, please send this LOPAD via fax to 49/(0)40/5078 2481

File: Unit_ReleaseBulletin_DIDI_24653_AA

List of pages and drawings (LOPAD) Manual Order No: 4512 984 24653 released: 07/2002

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2 © 2002 Philips Medical Systems 4512 984 24653 REV AA ALL RIGHTS RESERVED Unit_ReleaseBulletin_DIDI_a020_BW.doc

digital DIAGNOST Release bulletin 1.2.3

Table of contents

1. INTRODUCTION...................................................................................................................... 5 1.1. DEFINITIONS AND ABBREVIATIONS................................................................................................ 5

2. AVAILABLE DOCUMENTATION............................................................................................ 6 2.1. COMMERCIAL ............................................................................................................................. 6 2.2. SERVICE .................................................................................................................................... 6 2.3. USER MANUALS .......................................................................................................................... 6

3. GENERAL REMARKS............................................................................................................. 7 3.1. AVAILABLE OPTIONS.................................................................................................................... 8 3.2. COMPATIBLE PRINTERS............................................................................................................... 8 3.3. DICOM CONFORMANCE STATEMENT ........................................................................................... 8

4. FUNCTIONALITY .................................................................................................................... 8 4.1. WORKSTATION ........................................................................................................................... 8 4.1.1. Screensaver ............................................................................................................................. 8 4.1.2. Verification tool......................................................................................................................... 8 4.1.2.1. Time for displaying verification image...................................................................................... 8 4.1.2.2. Automatic shutter ..................................................................................................................... 8 4.1.2.3. Initial scaling............................................................................................................................. 8 4.1.2.4. Ranging .................................................................................................................................... 9 4.1.2.5. Window width slider in toggle tools .......................................................................................... 9 4.1.3. Re-processing tool / viewer...................................................................................................... 9 4.1.3.1. Stamp viewer capacity ............................................................................................................. 9 4.1.4. User/service interface............................................................................................................... 9 4.1.5. Image quality ............................................................................................................................ 9 4.1.5.1. Orientation of lines and columns.............................................................................................. 9 4.1.5.2. Blinking columns .................................................................................................................... 10 4.1.5.3. Mechanical shocks during operation...................................................................................... 10 4.1.5.4. Visibility of the moving grid..................................................................................................... 10 4.1.5.5. Artifacts from clothes or X-ray transparent mats.................................................................... 10 4.1.5.6. Collimator filter error............................................................................................................... 11 4.1.5.7. Bad aluminum blocks for calibration ...................................................................................... 11 4.1.5.8. Area with stripe patterns ........................................................................................................ 11 4.1.6. Detector handling & calibration .............................................................................................. 12 4.1.6.1. Detector - unpacking and installation ..................................................................................... 12 4.1.6.2. Calibration hints...................................................................................................................... 12 4.1.6.3. Error detection for calibration ................................................................................................. 12 4.1.6.4. Clear calibration button .......................................................................................................... 13 4.1.6.5. Continuous detector power .................................................................................................... 13 4.1.6.6. Customer access to calibration procedure............................................................................. 13 4.1.6.7. Calibration intervals................................................................................................................ 13 4.1.6.8. Installation of a new detector (field exchange)....................................................................... 14 4.1.6.9. Pixel calibration ...................................................................................................................... 14 4.1.6.10. OFFSET calibration................................................................................................................ 14 4.1.6.11. Pixel map update.................................................................................................................... 14 4.1.7. Networking/export .................................................................................................................. 15 4.1.7.1. DICOM image type CR........................................................................................................... 15 4.1.8. Printing (local) ........................................................................................................................ 15 4.1.8.1. Print layout ............................................................................................................................. 15 4.1.9. Remote printing via EV RAD.................................................................................................. 15 4.1.9.1. Remote print jobs ................................................................................................................... 15 4.1.9.2. Multi-size printers ................................................................................................................... 15 4.1.9.3. Multi-size printers / configuration ........................................................................................... 15 4.1.9.4. Multi-size printers plus additional printer................................................................................ 15 4.1.9.5. Printout scale.......................................................................................................................... 15 4.1.9.6. DICOM print ........................................................................................................................... 15 4.1.10. Status bar ............................................................................................................................... 16 4.1.10.1. External devices ..................................................................................................................... 16

release bulletin digital DIAGNOST (a/02.0) 3 Unit_ReleaseBulletin_DIDI_a020_BW.doc © 2002 Philips Medical Systems ALL RIGHTS RESERVED

Release bulletin 1.2.3 digital DIAGNOST

4.1.10.2. Log files .................................................................................................................................. 16 4.1.11. Connection to PCR/USIT ....................................................................................................... 16 4.1.11.1. Patient-ID string length........................................................................................................... 16 4.1.11.2. Transmission of special characters (e.g. öüä or Swedish Characters).................................. 16 4.2. MISCELLANEOUS ...................................................................................................................... 17 4.2.1. Jpeg Tools.............................................................................................................................. 17 4.2.2. Exposure index (EI)................................................................................................................ 18

5. SOLVED PROBLEMS IN RELEASE 1.2.3 (EXTENSION LEVEL 3) ................................... 19 5.1. MEMORY LEAKAGE IN START-UP TOOL........................................................................................ 19 5.2. CORRUPTED DARK IMAGE IN CASE OF SYSTEM START ................................................................. 19 5.3. INACCURATE SOFT SHUTTER CALCULATION ................................................................................ 19 5.4. DICOM NETWORK TIME-OUT TOO SHORT................................................................................... 19 5.5. EXAMUI : BANNER DISPLAY SOMETIMES INCONSISTENT WITH SELECTION ................................... 19 5.6. APR FOR RGDV TABLE ONLY................................................................................................... 19 5.7. SERVICE .................................................................................................................................. 20 5.8. CONVENTIONAL TH2 TABLE ...................................................................................................... 20

6. UPGRADES FROM RELEASE 1.2.1 TO RELEASE 1.2.3 ................................................... 20 6.1. GENERAL REMARKS .................................................................................................................. 20 6.2. SOFTWARE INSTALLATION ......................................................................................................... 20 6.3. RESTORE HANDLING ................................................................................................................. 20

7. KNOWN BUGS / RESTRICTIONS (IN RELEASE 1.2.3)...................................................... 21

4 (a/02.0) release bulletin digital DIAGNOST © 2002 Philips Medical Systems Unit_ReleaseBulletin_DIDI_a020_BW.doc

ALL RIGHTS RESERVED


1. INTRODUCTION Items described for release 1.2 or 1.2.1 are included in release 1.2.3. Release 1.2.1 was part of FCO 7120001 in June 2002. This release bulletin includes release 1.2, 1.2.1 and 1.2.3. 1.1. DEFINITIONS AND ABBREVIATIONS APR Anatomically Programmed Radiography AQDS Acquisition Data Set (as same as ACDS) DDF Digital Detector Frame DOR Digital Optical Recording (Optical Disk = OD = MOD) DICOM Digital Imaging and Communications in Medicine EUI Examination User Interface (= UI) HCU Hard Copy Unit (same as: LI = Laser Imager) NFS Network File System PCR Philips Computed Radiography PDEF Patient Data Entry Form RGDV Registration device (Auxiliary) RIS Radiology Information System HIS Hospital Information System UI User Interface WS Workstation



2. AVAILABLE DOCUMENTATION 2.1. COMMERCIAL Digital RAD family brochure Digitale Radiographie (German) 4512 158 11103 /712 * 1999.02 Digital Radiography (English) 4512 158 11101 /712 * 1999.02 Radiographie numerique (French) 4512 158 11102 /712 * 1999.05 Product brochure digital DIAGNOST (German) 4512 158 11093/712 * 1998.11 digital DIAGNOST (English) 4512 158 11091/712 * 1998.11 digital DIAGNOST (Spanish) 4512 158 11092/712 * 1999.03 digital DIAGNOST (French) 4512 158 11094/712 * 1999.06 Specifications digital DIAGNOST (German) 4512 158 10363/712 * 1998.10 digital DIAGNOST (English) 4512 158 10361/712 * 1998.10 digital DIAGNOST (Spanish) 4512 158 10364/712 * 1999.01 digital DIAGNOST (French) 4512 158 10362/712 * 1999.01 Leaflet digital DIAGNOST (English) 4512 158 11271 /712 * 1998.11 2.2. SERVICE digital DIAGNOST TH Rel. 1.2, PLANNING REFERENCE BOOK INTRANET ONLY !!!! digital DIAGNOST VR, PLANNING REFERENCE BOOK INTRANET ONLY !!!! (see http://pww.ms.philips.com/drawing_office/pmg/ -> Section 712) digital DIAGNOST TH Rel. 1.2, SYSTEM MANUAL INSTALLATION 4512 984 24721 digital DIAGNOST TH Rel. 1.2, SUBSYSTEM 4512 984 22842 digital DIAGNOST VE/VT/VR, SUBSYSTEM 4512 984 24702 digital DIAGNOST TH, WORKSTATION Rel.1.2 4512 984 23393 OPTIMUS RAD (Rel. 3.5) 4512 984 07207 Bucky DIAGNOST VE2/VT2, SUBSYSTEM 4512 984 22151 Bucky DIAGNOST CS2/4, SUBSYSTEM 4512 984 22292 PLANNED MAINTENANCE being prepared CORRECTIVE MAINTENANCE (as same as BUCKY) 4512 984 22181 CUSTOMER SUPPORT PLAN

(see http://www.de.ms.philips.com/dmc/custsup/) 2.3. USER MANUALS digital DIAGNOST V.1, digitales Aufnahmegerät (German) 4512 109 21303 digital DIAGNOST V.1, digital examination unit (English) 4512 109 21301 Related user manuals: bucky DIAGNOST VE/VT 4512 109 22701 (German) / 4512 109 22721 (English) bucky DIAGNOST VE/VT V.3 4512 109 24611 (German) bucky DIAGNOST CS 2/4 4512 109 22511 (German) / 4512 109 22821 (English) bucky DIAGNOST CS 2/4 V.3 4512 109 24691 (German) OPTIMUS 50/65/80 V.3 4512 109 20393 (German) / 4512 109 20391 (English)


ALL RIGHTS RESERVED


3. GENERAL REMARKS Release 1.2.3 of the digital DIAGNOST consists of the Bucky TH table with the integrated Trixell Static Flat Panel Detector, the Optimus generator (release 3.5) with generator operating console, the CS2/4 ceiling suspension and the general operating console (hereafter called 'Workstation'). The digital wallstand VE/VT is available as an option. The “wallstand only” system is called: digital DIAGNOST VR-E (VE) or VR-T (VT). Since release 1.2.3 a conventional TH2 table can be combined with a digital wallstand. All systems are delivered with an analog modem if no network/internet access is available. This has to be selected from the catalog. A 17” and a 18” flat color monitor is (optionally) available for the workstation. For detailed information about the functionality see Product brochure and Specifications.

Generator Optimus RAD

Wallstand digital/conventional

Ceiling CS2/CS

Bucky Table TH/digital/conventional

Workstation

Printer (3M)

LAN (HIS, RIS)IInternet / PSTN

Generator Console

CAN bus

FOL/RS485

Signal bus

direct link

tube supply

Wallstand Control (controlled by BuCO)

FOL/RS485

Amplimat Control

Amplimat Control

Modem

EV-RAD

Advanced Print

Dicom Store

Figure 3-1, system overview



3.1. AVAILABLE OPTIONS The available options are described in the PMS Catalog section 712/50, -/60 and -/80. 3.2. COMPATIBLE PRINTERS The printer compatibility list is available on the PMS-Intranet:

http://mimit.best.ms.philips.com/

Interoperability -> printing... Or directly use: http://pww.ics.ms.philips.com/inter/printer/printer_report.html

3.3. DICOM CONFORMANCE STATEMENT The DICOM conformance statement is available on the PMS-Intranet:

http://mimit.best.ms.philips.com/ Interoperability -> DICOM -> Conformance Statements -> IMG Acquisition Mod.

4. FUNCTIONALITY 4.1. WORKSTATION

4.1.1. Screensaver The screensaver uses a black screen. This might result in confusion to the user who might think that the workstation is powered OFF.

4.1.2. Verification tool

4.1.2.1. Time for displaying verification image This time is typically 12 seconds. It depends on the workload of the system and the number and sizes of the actual images.

4.1.2.2. Automatic shutter The recognition rate of the automatic shuttering is not 100%, esp. for images with high scatter radiation or lead objects / implants. Manual correction is always possible. The image data outside the marked area are disregarded if the button 'Confirm' is pressed!

4.1.2.3. Initial scaling The initial scaling of images is not always optimal and can be manually optimized via the 'Display size' buttons.


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4.1.2.4. Ranging The ranging of initial images and background is not always optimal and can be manually optimized via the 'Toggle tools -> GreyLevelTool'.

Note Using the show curves/show parameter function re-ranges the image. This overwrites the previously modified processing parameters (window width/window level). Switching OFF the show curves/parameters activates the previous settings.

4.1.2.5. Window width slider in toggle tools This slider has no effect on the finally processed images but only on the display of the verification image. Only in auto mode the final image is modified.

4.1.3. Re-processing tool / viewer

4.1.3.1. Stamp viewer capacity The stamp viewer shows the last 500 image stamps in the 'View all' mode. However, images from earlier patients can be viewed individually by pressing the button 'View'.

4.1.4. User/service interface The user and service interface is improved regarding the two-detector handling. Four buttons are selecting/indicating the different RGDVs: Table, Tomo, Wall and Free Exposure. Colors are indicating the status:

Yellow not ready (not calibrated) Green ready for examination Red error / not ready

Extended messages are indicating errors & handling failures.

4.1.5. Image quality

4.1.5.1. Orientation of lines and columns The detector has two dimensions, x and y. Y is the direction along the long side of the table, or from the head to the feet of the patient. A one-dimensional array of pixels is called 'column'. This direction is called 'vertical'. The other direction, along the small side of the table is called x-direction, a one-dimensional array in that direction is called 'line'. This is in analogy to the lines on a TV-screen. This direction is called 'horizontal'. In the standard system configuration, images are displayed 'as they are'. The standard configuration is a system with 'head side left' and AQDSs like 'extremities' or 'abdomen'. Those images have the same orientation as the gain and pixel map of the detector that can be viewed in the service mode. With 'head side right' all clinical images are displayed correctly upside-down on the screen compared to the calibration images. With 'chest'-AQDS the images are displayed mirrored left-right. Additionally, the 'Verification tool' can be used to rotate and mirror the images interactively. Therefore, it is not always easy to tell the 'true position' of a potential detector pixel that is visible on a hardcopy.



4.1.5.2. Blinking columns Sometimes columns may appear which are only in some images and cannot be removed via the 'Pixel map update'. In this case it may help to perform the 'Pixel map update' several times. Or re-do the pixel calibration. In Quality Assurance there is no pixel map update available.

Blinking columns in a patient image

Blinking columns in an unexposed image

4.1.5.3. Mechanical shocks during operation Strong mechanical shocks during normal operation may result in image disturbances.

4.1.5.4. Visibility of the moving grid The moving grid may produce stripes in special artificial images, e.g. homogeneous images with no aluminum filtration resulting in extremely short exposure times (typically 1-2ms). Re-do the “Grid delay time” if grid structures are visible.

Note: Grid lines are always slightly visible with exposure times < 1ms.

Grid not visible with 2ms Grid visible with 1ms

4.1.5.5. Artifacts from clothes or X-ray transparent mats Materials in the X-ray beam may be visible in the images due to the high contrast resolution of the system.


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4.1.5.6. Collimator filter error Solved with NICOL collimator.

4.1.5.7. Bad aluminum blocks for calibration Problem: For calibration a dedicated 21mm Al block is strongly recommended (code number 4512 130 91681). For quality assurance purposes, it is widely common to use Aluminum blocks of 25mm thickness. The difference in thickness itself would not cause mayor problems, if one would use 25mm Al for calibration. The problem is that some of these 25mm blocks are not suitable for the very large detector. A certain type of these blocks is made from 15cm diameter circular raw Aluminum, just a slice of a cylinder. This diameter is too small for a 43cm x 43cm detector at a focus distance of 110cm, see the image. Additionally, this block shows structures at the outer circumference and in the center. • Use the originally delivered 21mm AL block for calibration.

It can be ordered with 12NC: 4522 130 91681. Never use other Aluminum blocks for calibration!

• If such a block is used for quality assurance and some structures are visible, make another X-ray image with the block in a position rotated through 180 degrees. If the structure is rotated as well, the artifacts are a result of the block. If not, it could be the detector.

Lower right corner of the left image

Full image 43cm x 43cm with a 15cm diameter Al block

4.1.5.8. Area with stripe patterns If a group of exactly 120 adjacent columns give stripe patterns, the detector is defective. If a similar pattern appears with less or more columns affected, it may be that only the detector power supply is broken.



4.1.6. Detector handling & calibration

4.1.6.1. Detector - unpacking and installation The detector must be handled strictly according to the unpacking instructions on the box. Also in case of return shipment of a broken detector the packing must be done carefully and in the described way, including re-sealing of the plastic bag via adhesive tape. In case the detector temperature after transportation (airplane, truck etc.) is lower than the room temperature, it needs time to acclimate. Make sure the time is long enough! Keep the detector packed in the aluminium bag during this period!

4.1.6.2. Calibration hints • The correct sequence of calibration is:

1. Offset calibration 2. Gain calibration 3. Pixel calibration

Note: Pixel map update is not required after pixel calibration. (It is NOT available in Quality Assurance!).

• The correct RGDV is selected for each calibration (TABLE, TOMO or WALL). • The table is centered, the aluminum profiles and mechanical defects of the table plane/surface are not

in the X-ray field. • The grid is removed and the cover is closed again. • The aluminum filter is used. • The SID is 110cm (43,5inch) for table and 150cm (59inch) for wallstand. • No disturbing material is in the X-ray beam (even no big dust particles!). • If the SID is too small, the edges of the detector may remain unexposed.

They are considered as defective, resulting in an error.

Note: A planned calibration always requires gain and pixel calibration in a sequence. Only in case of unexpected calibrations because of artifacts a separate PIXEL calibration is allowed.

4.1.6.3. Error detection for calibration Several positioning and setting errors can be detected:

• Table top not in the middle (aluminum border in the image). • X-ray not centered to the detector. • Obstacles in the X-ray beam are identified. • INCORRECT filter and/or grid selected. • Wrong SID. • An error message is generated in one of these cases.


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4.1.6.4. Clear calibration button The service environment provides a 'Clear calibration' button. This button should only be used for: replacement of a detector modification of detector orientation (headsidetable / DDF FrontWall) in unstructured items All calibration data is removed. X-ray images are not be pixel or gain corrected until a new calibration is performed. Clear calibration is related to the different RGDVs: Table, Tomo, Wall.

4.1.6.5. Continuous detector power Since release 1.2: Systems have continuous power distribution of the detector even if the generator is switched OFF via the control desk. The first systems have an adapter connector for the detector cooling fan. Most of the newer systems are delivered with a new FSXD interface board which does not need this modification.

4.1.6.6. Customer access to calibration procedure Every detector requires individual calibration intervals . Therefore the customer has now access to several calibration items:

- Offset calibration - Gain calibration - Pixel calibration

The advantage is a reduction of service calls and service visits.

4.1.6.7. Calibration intervals Current experience shows that the required calibration intervals vary between detectors. Typically an interval of 1 ... 3 months is expected. In case of new artifacts this could be sporadically earlier. The calibration has to be performed after the detector reached its working conditions. The inner temperature stabilizes between 40°C and 48°C. The calibration needs to be repeated a day after the initial calibration (installation). Two examples for a required new calibration (GAIN calibration followed by PIXEL calibration):

Butting line



4.1.6.8. Installation of a new detector (field exchange) The following steps are recommended for a new system or a new detector after field exchange: • Install the detector and switch it ON. • Use the 'Clear calibration' button to remove all results from the previous detector.

Check for the correct RGDV (Table, Tomo and Wall). • Restart the system. • Wait at least 4 hours (after power-on of the detector) before performing a first temporary calibration. • Perform the offset calibration. • Perform a gain calibration and pixel calibration. • Perform all “field” tests from the IQ tool. • Now patient images can be taken. • Repeat the gain calibration and perform a pixel calibration the next day.

Release 1.1: Keep the system switched ON (generator)! Release 1.2: Detector is constantly supplied with power. Generator can be switched OFF.

4.1.6.9. Pixel calibration The pixel calibration generates a totally new pixel map. The previous one is not used any more. In the event of an error result of the pixel calibration do the following:

• Check the pixel map, which can be viewed in the acceptance list using the 'View' function.

If there are pixel clusters somewhere at the edges of the detector check the 'Calibration hints' once again.

• Check the file that contains information about which lines and columns are unusable. This is the file in: /GIGA_DISK1/DATA/CALIBRATION_TEMP/defect_0_LinesColumns.dat for normal mode and: /GIGA_DISK1/DATA/CALIBRATION_TEMP/defect_1_LinesColumns.dat for Tomo mode.

• Note that each line has two halves, 0=left and 1=right, the columns have 0=upper half and 1= lower half. • If there is a bad pixel cluster at the butting, the calibration may be successful if it is repeated with less

maximum dose. Override the largest mAs settings during the pixel calibration.

Note The pixel calibration requires a valid gain calibration. In urgent cases it is sufficient to perform only the pixel calibration but from time to time the gain calibration must be performed in addition (in advance)!

4.1.6.10. OFFSET calibration This calibration is not required for every detector. The procedure is recognizing automatically if the offset calibration is required. If not required for a detector, the offset calibration is hidden in the list. A “Clear calibration” re-activates the offset calibration. The offset calibration has to be performed at the very beginning. Always perform again also gain and pixel calibration!

4.1.6.11. Pixel map update Quick pixel calibration. Used to correct additional bad pixels or lines/columns. This is usually visible in clinical images as a white line. The customer has no access to this procedure. Mostly it is recommended that the pixel calibration be performed again. This calibration is not available in Quality Assurance!


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4.1.7. Networking/export

4.1.7.1. DICOM image type CR Due to the fact, that digital DIAGNOST images are from DICOM type 'CR' it may not be possible to distinguish between digital DIAGNOST and PCR images on viewing stations and PACS which are not able to display the name of the transmitting modalities.

4.1.8. Printing (local)

4.1.8.1. Print layout Depending on the collimation settings the system sometimes generates larger images than expected. This usually results in print output different from the expected scale or film size.

4.1.9. Remote printing via EV RAD

4.1.9.1. Remote print jobs Remote print jobs are not listed in the 'HCU' queue of the 'Status bar'. They appear as export jobs in the 'External devices' queue.

4.1.9.2. Multi-size printers Multi-size printers (having more than one film feed using different film formats) appear only once in the data base table 'Imager definitions' and in the configuration tool under 'Imager definitions'. Only one of the supported film sizes is shown there, but all supported film sizes are available to the printing system.

4.1.9.3. Multi-size printers / configuration When multi-size printing is configured, the printer using the smallest film size must be configured as the 'Default printer' in 'Site information'.

4.1.9.4. Multi-size printers plus additional printer If a multi-size printer supporting sizes of e.g. 8x10inches and 14x17inches is configured as the default printer, an additional printer for a film size of e.g. 11x14inches cannot be used.

4.1.9.5. Printout scale EV-RAD and digital DIAGNOST use a different image pixel size in image size calculations. This may result in different scales if a print job is generated by digital DIAGNOST or (manually) using the EV-RAD software at the EV-RAD workstation.

4.1.9.6. DICOM print At the moment this is only possible in combination with the Easy Vision RAD 4.2.2 (or higher) or the MERGE DPI system (Merge Box). The Merge DPI system behaves like a Laser Imager (3M Protocol). It is connected via the same cables/connectors to the HCU interface board of the workstation.

Note: Auto/Advanced print is only possible with the EasyPrint option installed on the Easy Vision 4.2.2.



4.1.10. Status bar

4.1.10.1. External devices Redirection of export jobs using the 'Status bar' (External device -> Standard store device -> DOR) is not possible, like it was with Thoravision. The archiver process crashes! If images are to be exported to DOR (or to another configured DICOM node) this must be done via the viewer. Note that the 'Standard export device' in the 'Viewer' after a restart is always the DOR. This might create unwanted DOR jobs which would have to be deleted via the 'Status bar / External device' window.

4.1.10.2. Log files The image processing log file is particularly likely to show WARNINGS. These are not critical. The log files may be difficult to read because of the small window. You can use the 'cdL' alias in a command tool window in 'Service mode' to change to the log file directory and inspect the files via a text editor.

4.1.11. Connection to PCR/USIT

4.1.11.1. Patient-ID string length If the 'Forward to USIT' functionality is used, the patient ID string length must be limited on the RIS to 15 characters. Although DiDi is able to handle 64 characters, USIT does not. Inconsistencies would result.

4.1.11.2. Transmission of special characters (e.g. öüä or Swedish Characters) If the 'Forward to USIT' functionality is used, the character set ISO_IR (Latin 1) must be configured on the USIT side.


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4.2. MISCELLANEOUS 4.2.1. Jpeg Tools Since release 1.2 the packages include an improved possibility to prepare faulty or bad images for transmitting them to Hamburg. This can also be made remotely or via a PC connection. The JPEG tools can be used to transform post or preimages to JPEG format. This compresses the images to improve the remote transportation and they can be handled on a PC with standard viewing tools. IQ problems can be identified much faster and archiving of IQ effects is possible now.

Available commands (to be used from a CommandTool) cdPO Alias to jump to the Post Image directory. cdP Alias to jump to the Pre-Image directory. infojpg Shows the info file. postjpg Creates a JPEG image from a Post-Image. prejpg Creates a JPEG image from a Pre-Image. detector Creates Detector relevant files to the TRANSFER directory. snapjpg Creates a Snapshot of the current monitor screen. From any command tool the info file “infojpg” gives details for handling. Type in: infojpg <return>

Contents of "infojpg": Tools to generate jpg images in /GIGA_DISK1/DATA/TRANSFER 1) postjpg

postjpg postimage.xxx full (full resolution) postjpg postimage.xxx 800 (or any other max size) postjpg postimage.xxx ppt (for "MS Power Point" presentation) postjpg postimage.xxx ctr (cuts the center out of big images)

You can convert all postimages by using:

cdPO foreach ttt ( post*xxx ) postjpg $ttt 500 end

2) prejpg

prejpg preimage.xxx full (full resolution) prejpg preimage.xxx 800 (or any other max size) prejpg preimage.xxx ppt (for "MS Power Point" presentation) prejpg preimage.xxx ctr (cuts the center out of big images)

3) detector

copies all detector relevant logfiles into a directory in /GIGA_DISK1/DATA/TRANSFER 4) snapjpg

creates a screen snapshot without user interface 5) infojpg

shows this information



4.2.2. Exposure index (EI) Properties of the exposure index EI

- The exposure index is calculated for each exposure.

The value is inversely proportional to the X-ray dose if only mAs is changed and all other conditions are kept constant (kV-setting, object, collimation, filtration, etc.). The EI value is derived from a histogram analysis of the image.

- For flat images with 70kV, 21mmAl filtration the detector entrance dose can be estimated with the: equation detector dose [µGy] = 1000 / EI or detector dose [mR] = 1000 / (8.87 x EI)

- There are deviations for different kV settings and filtration. Note that it is impossible to measure the detector dose directly. One can only measure the dose on top of the table plane.

- There are 3 different values for each factor of 2 in the dose. Example: ..., 100, 125, 160, 200, 250, 320, 400,... each step represents an increase in dose of 26%. Note that this is the same as used for generator mAs settings. The steps are also limited to 26% increments.

- The least real value would be EI = 5 for about 200µGy detector entrance dose which is in fact out of the range of the detector.

- The largest true value is EI = 2000 for about 0.5µGy. At all lower detector signals the exposure index is EI = 2500. This value indicates 'out of range' for low doses.

- There are deviations for EI values for some anatomies like lateral spine exposures. They tend to have higher EI values than expected. This can be explained by the fact that these images are very inhomogeneous. More than 25% of the area of these images are often underexposed due to the dense anatomical structures.

- The exposure index is reproducible for the same object and the same exposure settings. The reproducibility can be limited by rounding restrictions, for instance, one image may show 250, the next 320.

- The exposure index is shown on the verification image and is printed on the film. In a DICOM image the exposure index is the 'sensitivity' information. The exposure index is not shown on the stamp viewer.


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5. SOLVED PROBLEMS IN RELEASE 1.2.3 (EXTENSION LEVEL 3) 5.1. MEMORY LEAKAGE IN START-UP TOOL Each restart of the system led to an additional memory consumption. The moment the system ran out of memory several processes could not be started. This caused an unpredictable system behavior. Known symptoms were:

• Shutdown not possible • No connection to the detector • Message: “Detector not calibrated” even if already performed • Unclear hang-ups

5.2. CORRUPTED DARK IMAGE IN CASE OF SYSTEM START The first image of the table detector after a restart of the DIDI system could have a wrong offset correction This led to bad images quality for the first images. 5.3. INACCURATE SOFT SHUTTER CALCULATION The soft shutter algorithm sometimes (very seldom) led to invalid shutter polygons in the verification tool. No workaround was available for the clinical user. An image could be lost in exceptional cases. 5.4. DICOM NETWORK TIME-OUT TOO SHORT If PACS was not reacting in time, images were re-sent. This could result in image mix-up in PACS.

The time-out is now set to 240sec. 5.5. EXAMUI : BANNER DISPLAY SOMETIMES INCONSISTENT WITH SELECTION This was caused by incoming RIS patients. Possible effects were: 1. The selected patient did not correspond to the patient name displayed in the banner

(an offset of 1 has been observed). If then the last patient was selected the patient list could crash.

2. The list selection could become inconsistent by an incoming RIS patient. 5.6. APR FOR RGDV TABLE ONLY

The filtering of an examination was not correctly performed such that it could not be assigned to a patient. This happened if:

• At the generator new APRs were defined which were only executable for RGDV ‘table’. • For these APRs an AQDS was configured which was linked to a new examination assigned to a

group.



5.7. SERVICE The layout selection (film parted at long or short axis) for fixed scale mode 2-in-1 was not optimal with respect to size of cut area. 2-in-1 printing is now improved. 5.8. CONVENTIONAL TH2 TABLE A conventional TH2 table with ACL4 and INALFA can now be combined with a digital wall stand.

6. UPGRADES FROM RELEASE 1.2.1 TO RELEASE 1.2.3 6.1. GENERAL REMARKS

The complete upgrade (FCO712000X) to release 1.2.3 requires release 1.2.1. Make sure FCO 7120001 is performed. This is mainly important because of documentation and firmware upgrades within this FCO. It is possible to skip the installation of release 1.2.1 software and to install release 1.2.3 directly to a release 1.2. system. Install Release 1.2.3 It is only necessary to install the extension level 3 package. Solaris AND all other packages remain valid and can stay on the disk. A new workstation manual is available and will be delivered with the new release 1.2.3 systems and the FCO. 6.2. SOFTWARE INSTALLATION Only the extension level 3 package has to be installed (separately). No patient data and images are lost. → No restore is required. → In the selection of the RGDVs the conventional table

can be selected. 6.3. RESTORE HANDLING The release 1.2.1 backup can be restored to release 1.2.3 without any known restrictions.

20 (a/02.0) r © 2002 Philips Medical Systems

ALL RIGHTS RESERVED

save data:->Perform a BACKUP (1.2.1)

on a 1.2.1 system

APR adjustment->perform the APR adjustment

BACKUP:->Perform a new BACKUP (1.2.3)

Software installation->Type in: /EOD/install-> select the correct RGDV combination-> Type in:# exit-> console login: sabre

Preparation-> logout your system-> insert your (old) Customization floppy-> insert the 1.2.3 DOR (side B)-> login as root->Type in:# dor mount

elease bulletin digital DIAGNOST Unit_ReleaseBulletin_DIDI_a020_BW.doc


7. KNOWN BUGS / RESTRICTIONS (IN RELEASE 1.2.3) [01] Examination user interface can crash in case the DOR is used (writing mode). [02] Verification tool (working pool). Images can disappear from the list if an image is confirmed. [03] DICOM store. Appropriate error/failure handling. Errors lead to aborts. (No image loss!!) [04] A system shutdown (in the SERVICE TOOL) leads to a crash of the ALI process if images are in the processing queue. Images from the queue have to deleted manually. The related tests have to be repeated. [05] Tomo selection. In case of tomo configuration the service can select different tomo programs in the "acquisition setup" item. But this selection does not change the tomo program within the APR (e.g. tomo time / angle combination). [06] Stamp viewer. If the patient orientation (rotation, mirror) is changed, the stamp remains unchanged. On the other hand this does not hold for the gray level! [07] DOR handling. Removal of patients & images on DOR via PDEF "Modify -> Delete" does not work. [08] System crash after configuration of examination table attributes. It is still possible to configure examination table attributes (e.g. examination date) in configtool, item Patient Format, NormalList1, NormalList2, NormalList3. It could happen that the process: “patientListMgr” crashes. [09] Not possible to finish the examination (verification tool). Sometimes it is not possible to click "Patientlist" to finish the examination if “repeat” is used Images cannot be confirmed. (No image loss!). Use the toggle tool button and change manually the master image. [10] Popup into viewer is only black. If a popup appears into viewer tool it is only black. If the cursor is moved on the black popup its visible but the viewer looses colors. [11] Grid warning visible on control handle. The grid warning on the control handle is still visible if “Grid Warning option” is set to NO! [12] System options cannot be modified. The system options table cannot be modified in case new options are installed i.e. new wall stand or tomo etc. [13] Detector cooling fan is not controlled. If the DDF fan fails, the detector might be overheated. This does not cause damage but can influence the image quality. [14] Images are not exported to EV RAD in case of print option set to none in the verification tool. If the print option in the verification tool is set to “NONE” no image is sent to a connected EasyVision. [15] RIS study date/time overwritten. If ‘Study date’ and ‘Time’ are sent from RIS (RIS file tags: EXAM_DATE and EXAM_TIME) these values are overwritten with the date and time of the first acquisition of this study. This is not correct.



[16] Update of status display. The error status display in the status bar is only updated if a new job has been successfully performed. [17] Incomplete or faulty BACKUP is not indicated. In case of a faulty or incomplete BACKUP, the session ends with "successfully finished". [18] Index from DOR not completed.

After retrieval of patients from DOR a message appears that patients must be deleted before patients from DOR can be inserted. Only patients which are not in the actual patient list are shown.

[19] Popups are overlapping. If system and stop is clicked a short time after a restart, the popup 'Are you sure?..' appears. At the same time a system warning popup appears. Both popups try to be in front, there is a fast change between both popups. [20] Images do not appear in the HCU-PRINTING queue. Remote print images do not appear in the HCU queue. Instead they appear in the external devices queue! HCU calibration: Calibration images do not appear in the print queue either. [21] Show curves/parameters is not working well on small images. For small images, e.g. fingers, the parameters, curves and the debug image is not readable. Data is overlapping with the image. [22] Post method “semi_lin” is for application use only. Noise compensation in VOY_Curves > 0 causes a crash. This processing should only be used with application support. [23] No Ready after generator ON / OFF. In some cases the system does not reach READY status. Activate another RGDV on the generator desk and go back to the required RGDV. [24] PDEF (patient data entry form) may crash.

If patients from the patient list are deleted too fast this may crash the PDEF. A system restart is required in this case.

[25] Interruption of acceptance tests and calibrations causes inconstancies. Never interrupt the sequences. Always repeat the process completely to avoid faulty data. [26] Ranging problems on lung images on critical positions / collimations. The following effect on some lung images could occur in special cases: Lat-lung exposures on patients where collimation was too wide or the patient was not centered correctly, thus the image having a huge amount of direct radiation, produce lung areas are much too bright. In the verification image the user has the impression no lung detail seems to be visible. The main reason for this is the lung not being collimated correctly, letting the system face too much of raw (direct) radiation. To avoid this in advance please observe correct and tight collimation! However, when an incident like this happened, the image does not have to be repeated. Instead, use the shutter of the verification tool (pink lines) to tighten the field around the lung. Then, press the “rerange” button. After this, the image is normal. Even if you forgot to perform the above procedure, you can still create a sufficient, second processed image manually. To achieve this, use the reprocessing tool (refer to the operating manual) and create a second “post” image with increased “ROI-density”. Then reprint this image. [27] National characters of country kits (=country-specific keyboards) not usable.

With the following country kits (keyboards) the national characters cannot be used (the standard character set is usable!):

→ Sweden, Denmark, Finland, Norway, Japan and Taiwan.


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[28] User post methods could be corrupted. Creating a “User post method” based on a copy of the “Standard post method : semi_lin” leads to a mix-up of parameters in the copied post method. This also mixes up all other following user post methods. This results in incorrect image processing. The images are not lost but can be re-processed with another post method. Standard post methods are still ok. Workaround: -Reinstall the actual BACKUP in case this happened. -Do not use “semi_lin” as a user post method. (If “semi_lin” is used from standard post method pool everything works fine.)

Documents

Release Bulletin digital DIAGNOST Rel. 1.2 - Online … · release bulletin digital DIAGNOST SERVICE MANUAL - UNIT Release Bulletin digital DIAGNOST Rel. 1.2.3 Author: J. Röhling