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Journal of Biomedical Optics

Hybrid photomultiplier tube and photodiode parallel detection array for wideband optical spectroscopy of the breast guided by magnetic resonance imaging
Author(s): Fadi El-Ghussein; Michael A. Mastanduno; Shudong Jiang; Brian W. Pogue; Keith D. Paulsen
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Paper Abstract

A new optical parallel detection system of hybrid frequency and continuous-wave domains was developed to improve the data quality and accuracy in recovery of all breast optical properties. This new system was deployed in a previously existing system for magnetic resonance imaging (MRI)-guided spectroscopy, and allows incorporation of additional near-infrared wavelengths beyond 850 nm, with interlaced channels of photomultiplier tubes (PMTs) and silicon photodiodes (PDs). The acquisition time for obtaining frequency-domain data at six wavelengths (660, 735, 785, 808, 826, and 849 nm) and continuous-wave data at three wavelengths (903, 912, and 948 nm) is 12 min. The dynamic ranges of the detected signal are 105 and 106 for PMT and PD detectors, respectively. Compared to the previous detection system, the SNR ratio of frequency-domain detection was improved by nearly 103 through the addition of an RF amplifier and the utilization of programmable gain. The current system is being utilized in a clinical trial imaging suspected breast cancer tumors as detected by contrast MRI scans.

Paper Details

Date Published: 26 August 2013
PDF: 10 pages
J. Biomed. Opt. 19(1) 011010 doi: 10.1117/1.JBO.19.1.011010
Published in: Journal of Biomedical Optics Volume 19, Issue 1
Show Author Affiliations
Fadi El-Ghussein, Thayer School of Engineering at Dartmouth (United States)
Michael A. Mastanduno, Thayer School of Engineering at Dartmouth (United States)
Shudong Jiang, Thayer School of Engineering at Dartmouth (United States)
Brian W. Pogue, Thayer School of Engineering at Dartmouth (United States)
Keith D. Paulsen, Thayer School of Engineering at Dartmouth (United States)

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