Ultrasonic reflectivity computed tomography with small number of transmitter/receiver transducers for carotid diagnosis
✍ Scribed by Akira Yamada; Yasuyuki Goto
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- English
- Weight
- 662 KB
- Volume
- 163
- Category
- Article
- ISSN
- 0424-7760
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✦ Synopsis
Abstract
We developed an ultrasound reflectivity computed tomography (CT) system with only a small number of transmitter/receiver transducers for carotid diagnosis. To this end, a ring array system with eight element transducers was fabricated with center frequency 10 MHz. The present CT technique assures the image with high resolution on the order of 0.1 mm over the entire imaging region. In addition, the reduction of the number of transducer element enables fast data acquisition and lower cost hardware system. With appropriate combinations of the dual and/or separate transmitter and receiver pairs, 21 backscattering projection data were observed. To comply with the ill‐posed inverse problem due to the lack of angular view data, the conjugate gradient method was applied for the solution of the matrix observation equation. Both experiment and simulation examinations were made using the cylindrical shell object as a carotid phantom. As a result, it is demonstrated that the image with greater resolution compared with the conventional B‐mode method can be obtained by using only eight element transducers. © 2008 Wiley Periodicals, Inc. Electr Eng Jpn, 163(4): 58–66, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.20301