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Proceedings Paper

A light emitting diodes based photoacoustic system and its application in indocyanine green (ICG) enhanced human prostate cancer detection (Conference Presentation)

Paper Abstract

Transrectal ultrasound (TRUS) guided biopsy is the standard procedure for evaluating the presence of prostate cancer. TRUS, however, has limited sensitivity to prostate tumors, nor can it differentiate aggressive cancer from non-aggressive ones. The emerging photoacoustic (PA) imaging combined with TRUS offers a great promise to solve this overarching issue, especially when powered by tumor-targeting contrast agent. In this work, we studied the feasibility of PA imaging to cover the entire prostate by using light illumination via the urethral track. Experiment was conducted on whole human prostates ex vivo. The light source was an array of light emitting diodes (LED) which has many advantages compared to solid state laser. The LED array was placed in the urethra, delivering light with fluence within the ANSI safety limit. A PA and ultrasound (US) dual modality system acquired the images in the same way as in TRUS. The imaging target was a 1-mm tube filled with ICG solution, mimicking the situation of a prostate tumor labeled with ICG contrast agent. The imaging results demonstrated that PA imaging can detect the ICG-filled tube at any place in the prostate, with an imaging depth over 20 mm. This study validated that PA imaging, when performed in a transrectal manner and combined with transurethral light illumination, is capable of molecular level imaging of the entire prostate noninvasively. The high sensitivity offered by PA imaging in detecting aggressive prostate cancer may contribute to prostate cancer management, e.g., enabling more accurate guidance for needle biopsy.

Paper Details

Date Published: 4 March 2019
Proc. SPIE 10878, Photons Plus Ultrasound: Imaging and Sensing 2019, 1087809 (4 March 2019); doi: 10.1117/12.2507921
Show Author Affiliations
Haonan Zhang, Tongji Univ. (China)
Qian Cheng, Tongji Univ. (China)
Shengsong Huang, Tongji Univ. (China)
Yingna Chen, Tongji Univ. (China)
Mengjiao Zhang, Tongji Univ. (China)
Weiya Xie, Tongji Univ. (China)
Jing Pan, Tongji Univ. (China)
Guan Xu, Univ. of Michigan (United States)
Denglong Wu, Tongji Univ. (China)
Xueding Wang, Tongji Univ. (China)

Published in SPIE Proceedings Vol. 10878:
Photons Plus Ultrasound: Imaging and Sensing 2019
Alexander A. Oraevsky; Lihong V. Wang, Editor(s)

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