28 October 2006 MEMS ultrasonic probe rotary scanning imaging system for medical endoscope
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Medical ultrasonic endoscope is the combination of electronic endoscope and ultrasonic sensor technology. Ultrasonic endoscope sends the ultrasonic probe into coelom through the biopsy channel of an electronic endoscope and rotates it by a micro motor, acquiring fault histology features of digestive organs. Compared with external ultrasonic detection, the system reduces the distance between the transducer and the organ, diminishing the effects on imaging of fats and body cavity gas. On the basis of ultrasonic imaging system, this paper implements a pulse echo imaging system. We describe the ultrasonic probe, emission circuit, receiving circuit and protective circuit in detail. With the demodulation circuit, we get the amplitude of echo which indicates the objects. And to achieve the rotary scan, we design a synchronous control circuit and a data transfer circuit basing on the USB2.0 interface. Finally we get a grey image with 256 grey levels after coordinate conversion.
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Xiaodong Chen, Xiaodong Chen, Shijie Wen, Shijie Wen, Daoyin Yu, Daoyin Yu, } "MEMS ultrasonic probe rotary scanning imaging system for medical endoscope", Proc. SPIE 6358, Sixth International Symposium on Instrumentation and Control Technology: Sensors, Automatic Measurement, Control, and Computer Simulation, 635818 (28 October 2006); doi: 10.1117/12.717826; https://doi.org/10.1117/12.717826

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