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Proceedings Paper

Transmission and reflective ultrasound images using PE-CMOS sensor array
Author(s): Shih-Chung Benedict Lo; Chu Chuan Liu; Matthew T. Freedman; John Kula; Bob Lasser; Marvin E. Lasser; Yue Wang
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Paper Abstract

The purpose of this study is to investigate the imaging capability of a CMOS (PE-CMOS) ultrasound sensing array coated with piezoelectric material. There are three main components in the laboratory setup: (1) a transducer operated at 3.5MHz-7MHz frequency generating unfocused ultrasound plane waves, (2) an acoustic compound lens that collects the energy and focuses ultrasound signals onto the detector array, and (3) a PE-CMOS ultrasound sensing array (Model I400, Imperium Inc. Silver Spring, MD) that receives the ultrasound and converts the energy to analog voltage followed by a digital conversion. The PE-CMOS array consists of 128×128 pixel elements with 85μm per pixel. The major improvement of the new ultrasound sensor array has been in its dynamic range. We found that the current PE-CMOS ultrasound sensor (Model I400) possesses a dynamic range up to 70dB. The system can generate ultrasound attenuation images of soft tissues which are similar to digital images obtained from an x-ray projection system. In the paper, we also show that the prototype system can image bone fractures using reflective geometry.

Paper Details

Date Published: 12 April 2005
PDF: 8 pages
Proc. SPIE 5750, Medical Imaging 2005: Ultrasonic Imaging and Signal Processing, (12 April 2005); doi: 10.1117/12.595615
Show Author Affiliations
Shih-Chung Benedict Lo, Georgetown Univ. Medical Ctr. (United States)
Chu Chuan Liu, Georgetown Univ. Medical Ctr. (United States)
Virginia Polytechnic Institute and State Univ. (United States)
Matthew T. Freedman, Georgetown Univ. Medical Ctr. (United States)
John Kula, Imperium, Inc. (United States)
Bob Lasser, Imperium, Inc. (United States)
Marvin E. Lasser, Imperium, Inc. (United States)
Yue Wang, Virginia Polytechnic Institute and State Univ. (United States)

Published in SPIE Proceedings Vol. 5750:
Medical Imaging 2005: Ultrasonic Imaging and Signal Processing
William F. Walker; Stanislav Y. Emelianov, Editor(s)

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