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Proceedings Paper

Projection-reflection ultrasound images using PE-CMOS sensor: a preliminary bone fracture study
Author(s): Shih-Chung B. Lo; Chu-Chuan Liu; Matthew T. Freedman; Seong-Ki Mun; John Kula; Marvin E. Lasser; Bob Lasser; Yue Joseph Wang
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Paper Abstract

In this study, we investigated the characteristics of the ultrasound reflective image obtained by a CMOS sensor array coated with piezoelectric material (PE-CMOS). The laboratory projection-reflection ultrasound prototype consists of five major components: an unfocused ultrasound transducer, an acoustic beam splitter, an acoustic compound lens, a PE-CMOS ultrasound sensing array (Model I400, Imperium Inc. Silver Spring, MD), and a readout circuit system. The prototype can image strong reflective materials such as bone and metal. We found this projection-reflection ultrasound prototype is able to reveal hairline bone fractures with and without intact skin and tissue. When compared, the image generated from a conventional B-scan ultrasound on the same bone fracture is less observable. When it is observable with the B-scan system, the fracture or crack on the surface only show one single spot of echo due to its scan geometry. The corresponding image produced from the projection-reflection ultrasound system shows a bright blooming strip on the image clearly indicating the fracture on the surface of the solid material. Speckles of the bone structure are also observed in the new ultrasound prototype. A theoretical analysis is provided to link the signals as well as speckles detected in both systems.

Paper Details

Date Published: 10 March 2008
PDF: 8 pages
Proc. SPIE 6920, Medical Imaging 2008: Ultrasonic Imaging and Signal Processing, 692005 (10 March 2008); doi: 10.1117/12.772847
Show Author Affiliations
Shih-Chung B. 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)
Seong-Ki Mun, Georgetown Univ. Medical Ctr. (United States)
John Kula, Imperium, Inc. (United States)
Marvin E. Lasser, Imperium, Inc. (United States)
Bob Lasser, Imperium, Inc. (United States)
Yue Joseph Wang, Virginia Polytechnic Institute and State Univ. (United States)

Published in SPIE Proceedings Vol. 6920:
Medical Imaging 2008: Ultrasonic Imaging and Signal Processing
Stephen A. McAleavey; Jan D'hooge, Editor(s)

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