New Patents Xl,,

assigned to Tokyo Shibaura Denki Kabushiki Kaisha

Ultrasonic imaging apparatus including ul- trasonic transducers for emitting acoustic wave beams of various apertures, apparatus for direc- ting two acoustic wave beams of substantially different focussing distances on the same beam direction, circuitry for receiving the reflected waves corresponding to the beam directions, ap- paratus for modulating the scanning lines cor- responding to the beam directions of the reflected acoustic waves, and apparatus for com- posing the scanning lines corresponding to the two acoustic beams directed on the same beam direction into a single scanning line for display.

rotates in the fluid tank around an essentially vertical axis aligned toward the round opening in the center of the cover. In the case of such ul- trasonic tomography devices, there is both the requirement of obtaining information from areas as close to the chest wall as possible, and the necessity of distinguishing localized informa- tion that can be traced back to artifacts, from real localized information. For this purpose, the invention provides an additional horizontal axis, intersecting the vertical axis just a few mil- limeters below the surface of the fluid, which is attached to a second angled support rotating around a vertical axis. From this additional horizontal axis is suspended a revolving, essen- tially L-shaped support bearing a second ul- trasonic transmitting and receiving system on its free end that is capable of revolving through the median perpendicular to the central opening in the cover, and whose direction of radiation is aligned to the mid-point of the central opening in the cover. An ultrasonic tomography device designed in accordance with the invention is par- ticularly suited for use in medical technology.

4542519 4541436

ULTRASONIC TOMOGRAPHY DEVICE

Dieter Hassler, Wolfgang Mittelstaedt, Utten- reuth, Federal Republic Of Germany assigned to Siemens Aktiengesellschaft

The invention involves an ultrasonic tomography device having an ultrasonic trans- mitting and receiving system for scanning an ob- ject under examination from different angles line by line, a fluid tank for immersing the object to be examined, a cover for the fluid tank with a round opening in the center for inserting the ob- ject under examination, and a support for an ul- trasonic transmitting and receiving system which

COMPUTERIZED TOMOGRAPHY APPARATUS

Hirosh Sugimoto, Tochigi, Japan assigned to Tokyo Shibaura Denki Kabushiki Kaisha

A computerized tomography apparatus in- cluding an array of radiation detectors including plural scintillation crystals and photoelectric transducers alternately disposed to receive a fan shaped radiation beam. The scintillation crystal is optically connected with the photoelectric transducer at the interface therebetween, which is elongated in the direction of a radiation im- pinging thereon and transverse the direction of the array. The radiation passing through a patient’s body to be examined impinges on the crystals causing them to scintillate. The light scintillated strikes the detection region of the photoelectric transducer causing the photo- electric effect to be manifested. The detection re- gion does not depend on the size of radiation