Prime Open-MRI Hitachi Medical Corporation MR Sales ...arima-medical.mn/wp-content/uploads/2015/02/introduction-of-APER… · With the solenoid coils, the imaging area is positioned

Copyright © Hitachi Medical Corporation.2010. All rights reserved.

Hitachi Medical Corporation

Prime Open-MRI

MR Sales & Marketing

Copyright © Hitachi Medical Corporation.2010. All rights reserved. 1

A Different Solution for High-field Applications

The prime imaging capabilities

Superb image quality

Advanced capabilities

Sophisticated operability

Smooth operation on the large screen

Simple and quick protocol settings

The prime magnet technologies

Ultra high performance magnetic circuit

Advanced magnetic field control

Sophisticated Open MRI technologies

Sophisticated open architecture

Amenity in MRI examinations


0.4T Magnet – compact but strong

The 0.4T magnet of APERTO Lucent is supported

by technologies to achieve high efficiency of using

magnetic power.

High performance magnetic circuit (structure)

New generation material

Benefit:

Mitigation of eddy current which causes artifacts

Ultra High Performance Magnetic Circuit

Eddy current suppressive magnet

Fracture of scaphoid bone

FatSat T2WI T2WI


Stroke

T2WI

DWI

FLAIR

ADC

APERTO Lucent - Quality images with ECC

ECC System

Hitachi has solved eddy current problems by adopting the eddy current suppressed magnetic system and the ECC technology which predicts and suppresses the eddy current.

Benefit:

Quality images even with sequences susceptible to eddy current such as EPI-DWI and BASG

ECC:off ECC:on


Powered by latest gradient system

The most powerful gradient among

permanent magnet Open MRI

Gradient strength ： 25mT/m

Slew rate ： 55T/m/s The water cooling system is not required.

Significant time reduction

Shortened

rise-time

Enhancement of

the Gradient

system

APERTO

Lucent

Conventional

GC system

Gradient System


Super Shim* enables high order shimming to

compensate complex cause of inhomogeneity of

the magnetic field.

Performance of advanced sequences such as EPI-

DWI, BASG and CHESS (RF FatSat) is

dramatically improved.

Super Shim System

Y

X

Z Z

Y

X

Conventional (first order) shim High order shim

[Experiment of SuperShim with a phantom]

Ｏｆｆ

On

[Improvement in BASGS with SuperShim]

Ｏｆｆ On

Comparison of SuperShim On and Off

*Option


Vertical Field Technologies

[Head imaging with a joint coil]

Homogenous images with high

sensitivity are obtained with a

simple joint coil.

High sensitivity solenoid receiver coils

APERTO Lucent, a Vertical field Open MRI adopts high sensitivity solenoid receiver coils.

With the solenoid coils, the imaging area is positioned in the center of the receiver coil, and MR signals

are efficiently received so as to acquire high SNR images.

More over, sensitivity distribution of solenoid coils is wide in head-foot direction.

FLAIR T2WI

Solenoid type receiver coil

Receiving

direction

York

Magnetic field direction Permanent magnet

Solenoid type receiver coil signal intensity distribution

Pole piece

Sensitivity

Low High


Solenoid Receiver Coils

APERTO Lucent adopts high sensitivity solenoid receiver coils, which efficiently collect the minimal MR signals.

The receiver coils used for a variety of body parts are available.
















RADAR (Radial Acquisition Regime)

Fills the K-space

with the center of the

k-space as the axis

Fills the k-space in one

direction with equally

spaced intervals

Principle of RADAR

kx

ky

Hybrid Radial Scanning

kx

ky

Normal Cartesian

Scanning

kx

ky

Radial Scanning

RADAR

Selectable from Radial and Hybrid radial methods

Now RADAR* is available for APERTO Lucent.

*Option

Filled the K-space with

blades (groups of trajectories

aligned parallel) determined

by echo factor


Advantages of RADAR

Features of RADAR Suppression of various “motion” artifacts

Body motion Respiration Heart beat

Fast and simple

Versatility in regions and slice planes

Various contrasts

Advantages of RADAR

Not only T2WI, but also T1WI, FLAIR and PDWI

Arbitrarily slice planes including AX, SAG and COR

Minimum prolongation in scan time Simple and easy to switch RADAR / Normal


Features of RADAR

FSE(T2WI) 3:46

RADAR-FSE(T2WI) 3:58

Suppression of motion artifacts

RADAR suppresses motion artifacts Artifacts from involuntary motion such as blood flow and CSF are also compensated


Advantages of RADAR

RADAR T2WI(FSE)

4:13

RADAR FLAIR(FIR)

5:20

RADAR T1WI(SE)

6:05

Flexibility in application with various contrasts

Not only T2WI, but also possible to apply with T1WI, FLAIR etc. Just a short prolongation in imaging time compared with normal scanning


Advantages of RADAR

Superior versatility

Slice planes incl. AX, SAG, COR can be selected arbitrarily Simple and easy to switch RADAR / Normal scanning

Abdomen (Free Breath) RADAR-FLAIR(COR) 5:21

RADAR-PDWI 5:38



prime FSE *

primeFSE optimizes the echo allocation and minimizes Inter Echo Time in FSE sequences.

These features help reduce artifact and acquire easy-to-diagnose images.

Also, the flexibility of parameters simplifies the parameter settings.

* Option

Hippocampus primFSE image

High resolution images

High resolution images with

2048*2048 image reconstruction

matrix.

2048×2048 reconstruction


ＦＩＴＴ (Fine tune technology)

FITT compensates gap in signals between slabs. This feature enables improved image

quality in MRA by optimizing MTC pulse and RF pulse.

FITT realizes clear images of fine vessels without boundary artifact between slabs.

ＶＲ* (Volume Rendering)

VR* helps understand anteroposterior relations. Since this rendering process is done on the MRI console but not the 2nd workstation, examination can be conducted efficiently.

*Option

cerebral aneurysm

High definition MRA

MIP image VR image


Early rhumatism

Separate images of fat and water can

be obtained in a wide FOV.

Benefit:

Applicable to various applications without

limitation of FOV.

FatSep

FatSep T2*WI

The open gantry allows special patient

positioning (like above picture) which is

difficult with Closed MR is possible.


High order shimming

Super Shim* enables high order shimming

to compensate complex cause of

inhomogeneity of the magnetic field.

Benefit:

Homogenized magnetic field even with a

patient inside the gantry.

Y

X

Z Z

Y

X

Conventional

(first order) shim High order shim

CHESS:on CHESS:off

CHESS (RF fat saturation)

*

CHESS fat suppression method CHESS* was thought to be difficult to be

realized with Open-MRI. However, high

homogeneity is secured by Super Shim*

which enables CHESS*.

Benefit:

Fat suppression with various sequences

including FSE, FIR, BASG and DW-EPI. Effective FOV with CHESS = 200mm

*Option

*


also enables APERTO Lucent to perform CE-Perfusion*.

CE-Perfusion is an application to measure slight change of magnetic

field around peripheral vessels.

Benefit:

Help diagnose acute brain infarction

Comparison of diffusion – perfusion mismatching

Dynamic Image

R

L ①

②

③

④

CE Perfusion

*

*Option Time-Intensity Curve

0.8

0.9

1

0 10 20 30 40 50 60

Time[s]

Inte

nsit

y [

rati

o]

②

① ④

③


MTT

CBF

CBV

2

1 3

4

1

(2days after symptom started)

Time-Intensity

3

2

DWI

FLAIR TOF T1

CE Perfusion

Clinical application of CE Perfusion measurement

Dynamic Image
















Smooth Operation on the large screen

Wide Display



User-friendly GUI

The operating system based on that of high-field MRI Echelon.

The operational environment compatible with high-field applications.

High Speed Image reconstruction

The powerful computer architecture

30 times faster image reconstruction

compared to that of our conventional open

MRI.

Benefit:

Complicated processing such as FatSep

and Volume Rendering can be done in a

short time.



Curved MPR Radial MPR

Radial MPR creates MPR images of radially positioned slice planes.

Multiple slice images are reconstructed at the same time with easy operation.

Benefit:

This function is useful for diagnosis of complicated structure such as knee joint.

MPR (arbitrary plane reconstruction from 3D data) is applicable to curved slice planes.

Benefit:

Since multiple curves can be reconstructed at once, this feature is useful for cases such as scoliosis.



Parameter guidance function

In case the parameters need to be

changed because of the limitations of

scanning condition, alternative

parameters are automatically offered

on the screen.

Reshuffle of protocols

Protocols can be changed easily

according to patient’s condition.
















Benefit:

Positioning of regions away from the midline such

as the shoulder and knee is easy and comfortable.

This feature helps acquire very clear images.

Open architecture The open design (320°open around the gantry) realizes patient comfort.

Benefit: Allows claustrophobic patients and small children to feel comfortable during the exam.

Comfortable patients yield to support to acquire best images.


Lateral Slide Table


Soft Sound feature

→ ←

Gradient coils

Excellent patient experience in MR exam

• Quieter acoustic noise

• Small gradient vibration

Secrets of less audible noise and vibration feature

No resonant parts to amplify acoustic noise

The Flat GC does not vibrate much due to its shape

→ In case of APERTO Lucent, the gradient

vibration hit the GC from the side. Thus, the

GC does not vibrate much.


Amenity of patient table

Minimum height

The minimum table height of about 450mm enables the elderly patients and small children to get on and off the table easily.

Foot switch

For vertical and horizontal movements

of the table

Benefit:

Hands of the operator remain free for

taking closer care of patients.


Economical and ecological

Small installation space

Since the equipment room is not necessary, the installation space can be used efficiently. Also, the small shield room helps save the cost for ancillary equipments.

Actual installation plan may vary depending

on the condition of the site.

Electrical power saving

Since the required power supply is only

10kVA and a large-scale cubicle is not

required, the monthly cost of electricity is

very reasonable.

No need to purchase expensive

periodic replacement parts and supplies.

Stable operation is assured with no

risk of quench.

Small running cost


Hitachi Medical Corporation

Introducing APERTO Lucent

MR Sales and Marketing

2010/07/07

END


Documents

Prime Open-MRI Hitachi Medical Corporation MR Sales ...arima-medical.mn/wp-content/uploads/2015/02/introduction-of-APER… · With the solenoid coils, the imaging area is positioned