Projection ultrasound and ultrasound CT using a PE-CMOS sensor: a preliminary study

Chu Chuan Liu; Shih-Chung Benedict Lo; Matthew T. Freedman M.D.; David Rich; John Kula; Bob Lasser; Marvin E. Lasser; JianChao Zeng; Doug Ro

doi:10.1117/12.537672

28 April 2004 Projection ultrasound and ultrasound CT using a PE-CMOS sensor: a preliminary study

Chu Chuan Liu, Shih-Chung Benedict Lo, Matthew T. Freedman M.D., David Rich, John Kula, Bob Lasser, Marvin E. Lasser, JianChao Zeng, Doug Ro

Author Affiliations +

Proceedings Volume 5373, Medical Imaging 2004: Ultrasonic Imaging and Signal Processing; (2004) https://doi.org/10.1117/12.537672
Event: Medical Imaging 2004, 2004, San Diego, California, United States

Abstract

The purpose of this study is to investigate the feasibility of generating 3D projection ultrasound computed tomography images using a transmission ultrasound system via a piezoelectric material coated CMOS ultrasound sensing array. There are four main components in the laboratory setup: (1) a transducer operated at 5MHz 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 CMOS ultrasound sensing array (Model I100, Imperium Inc. Silver Spring, MD) that receives the ultrasound and converts the energy to analog voltage followed by a digital conversion, and (4) a stepping motor that controls the rotation of the target for each projection view. The CMOS array consists of 128×128 pixel elements with 85μm per pixel. The system can generate an ultrasound attenuation image similar to a digital image obtained from an x-ray projection system. A computed tomography (CT) study using the ultrasound projection was performed. The CMOS array acquired ultrasound attenuation images of the target. A total of 400 projections of the target image were generated to cover 180o rotation of the CT scan, each with 0.45° increment. Based on these 400 projection views, we rearranged each line profile in the corresponding projection views to form a sinogram. For each sinogram, we computed the cross section image of the target at the corresponding slice. Specifically, the projection ultrasound computed tomography (PUCT) images were reconstructed by applying the filtered back-projection method with scattering compensation technique. Based on the sequential 2D PUCT images of the target, we generated the 3D PUCT image.

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Chu Chuan Liu, Shih-Chung Benedict Lo, Matthew T. Freedman M.D., David Rich, John Kula, Bob Lasser, Marvin E. Lasser, JianChao Zeng, and Doug Ro "Projection ultrasound and ultrasound CT using a PE-CMOS sensor: a preliminary study", Proc. SPIE 5373, Medical Imaging 2004: Ultrasonic Imaging and Signal Processing, (28 April 2004); https://doi.org/10.1117/12.537672

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