Multiple diagnosable distance range ultrasonic diagnostic appara

Details Multiple diagnosable distance range ultrasonic diagnostic appara Multiple diagnosable distance range ultrasonic diagnostic appara

1987-08-14

1989-08-29

Jaworski, Francis

Surgery

Truss

Pad

12866010, A61B 812

Patent

active

048607584

ABSTRACT:
First and second ultrasonic transducers are provided at the distal end portion of a flexible insertion portion (to serve as a probe) of an endoscope. During diagnosis, the distal end portion of insertion portion is fixed in a tubular organ by a balloon which is filled with water. Ultrasonic lenses having different focal distances are mounted on the transducers. The resonance frequencies of the transducers differ from each other. The transducers are rotated about a shaft of the insertion portion by a motor, in order to mechanically radial-scan an object to be examined. A relay box for supplying a drive signal to the transducers is connected to the endoscope, and a diagnositc device with a display is connected to the relay box. The relay box includes first and second transmitting circuits, and output drive pulses therefrom are supplied to the transducers. The relay box also comprises a switch and a switching circuit connected to the transmitting circuits for selecting one of the transmitting circuits by operating the switch. Therefore, only a selected one of the transmitting circuits supplies the drive pulse to the transducer. An ultrasonic echo signal received by the transducer is supplied to the diagnostic device to display a tomographic image.

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