IMR Press / FBE / Volume 2 / Issue 1 / DOI: 10.2741/E85

Frontiers in Bioscience-Elite (FBE) is published by IMR Press from Volume 13 Issue 2 (2021). Previous articles were published by another publisher on a subscription basis, and they are hosted by IMR Press on imrpress.com as a courtesy and upon agreement with Frontiers in Bioscience.

Open Access Article
PE-CMOS based C-scan ultrasound for foreign object detection in soft tissue
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1 Imaging Science and Information Systems Center, Georgetown University Medical Center, Washington, DC 20057, USA
2 Bradley Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Arlington, VA 22203, USA
3 Imperium Inc., Silver Spring, MD 20903, USA

*Author to whom correspondence should be addressed.

Front. Biosci. (Elite Ed) 2010, 2(1), 231–240; https://doi.org/10.2741/E85
Published: 1 January 2010
Abstract

In this paper, we introduce a C-scan ultrasound prototype and three imaging modalities for the detection of foreign objects inserted in porcine soft tissue. The object materials include bamboo, plastics, glass and aluminum alloys. The images of foreign objects were acquired using the C-scan ultrasound, a portable B-scan ultrasound, film-based radiography, and computerized radiography. The C-scan ultrasound consists of a plane wave transducer, a compound acoustic lens system, and a newly developed ultrasound sensor array based on the complementary metal-oxide semiconductor coated with piezoelectric material (PE-CMOS). The contrast-to-noise ratio (CNR) of the images were analyzed to quantitatively evaluate the detectability using different imaging modalities. The experimental results indicate that the C-scan prototype has better CNR values in 4 out of 7 objects than other modalities. Specifically, the C-scan prototype provides more detail information of the soft tissues without the speckle artifacts that are commonly seen with conventional B-scan ultrasound, and has the same orientation as the standard radiographs but without ionizing radiation.

Keywords
Projection ultrasound
C-scan ultrasound
PECMOS sensor array
Foreign objects detection
Soft tissue
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