数字式超声内窥成像系统(英文)  

A Digital Ultrasonic Endoscope System for Medical Imaging

作　　者：陈晓冬[1,2] 李明[1,2] 周浩[1,2] 温世杰[1,2] 郁道银[1,2] 

机构地区：[1]天津大学精密仪器与光电子工程学院,天津300072 [2]天津大学光电信息技术科学教育部重点实验室,天津300072

出　　处：《光子学报》2010年第4期744-749,共6页Acta Photonica Sinica

基　　金：Supported by the Project of the Education Department of China(106048);the National High Technology Researchand Development Program of China(2007AA04Z339);the National Natural Science Foundation of China(6082700)

摘　　要：The development of a novel push-type ultrasonic endoscope is described in which probe rotation is accomplished by a small motor situated near the transducer. A digital FPGA-based ultrasound imaging system is implemented which uses coded excitation to increase the SNR and penetration depth, with probe rotation accomplished by a small motor situated near the transducer replacing the external motor and the long steel wire used in other ultrasonic endoscopes. The apparatus is tested continuously for 300 hours with no obvious problems. The coded excitation, digital quadrature demodulation imaging system can obtain ultrasonic images of higher quality and more information of the echo is preserved compared with the analog imaging system, because the analog digital conversion is moved to the first step of the signal processing.The digital imaging system possesses a higher SNR resulting in a sharp image. Locating the motor near the probe improves the consistency of rotational speed in comparison with external guide-wire rotation, and increases the image quality and life-span of these devices.The development of a novel push-type ultrasonic endoscope is described in which prooe rotation is accomplished by a small motor situated near the transducer. A digital FPGA-based ultrasound imaging system is implemented which uses coded excitation to increase the SNR and penetration depth, with probe rotation accomplished by a small motor situated near the transducer replacing the external motor and the long steel wire used in other ultrasonic endoscopes. The apparatus is tested continuously for 300 hours with no obvious problems. The coded excitation, digital quadrature demodulation imaging system can obtain ultrasonic images of higher quality and more information of the echo is preserved compared with the analog imaging system, because the analog digital conversion is moved to the first step of the signal processing. The digital imaging system possesses a higher SNR resulting in a sharp image. Locating the motor near the probe improves the consistency of rotational speed in comparison with external guide-wire rotation, and increases the image quality and life-span of these devices.

关 键 词：超声内窥镜 微型电机 编码激励 数字成像系统 

分 类 号：TH785.5[机械工程—仪器科学与技术]