Journal
JOURNAL OF BIOMEDICAL OPTICS
Volume 19, Issue 7, Pages -Publisher
SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
DOI: 10.1117/1.JBO.19.7.071410
Keywords
imaging system; biomedical optics; image processing; parallel processing; interferometry; imaging coherence
Funding
- NYSTAR Foundation [C050070]
- NIH [EY007125]
- University of California, Los Angeles
- Center for Visual Science
- Directorate For Engineering
- Div Of Industrial Innovation & Partnersh [1346453] Funding Source: National Science Foundation
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Gabor-domain optical coherence microscopy (GD-OCM) is a volumetric high-resolution technique capable of acquiring three-dimensional (3-D) skin images with histological resolution. Real-time image processing is needed to enable GD-OCM imaging in a clinical setting. We present a parallelized and scalable multi-graphics processing unit (GPU) computing framework for real-time GD-OCM image processing. A parallelized control mechanism was developed to individually assign computation tasks to each of the GPUs. For each GPU, the optimal number of amplitude-scans (A-scans) to be processed in parallel was selected to maximize GPU memory usage and core throughput. We investigated five computing architectures for computational speed-up in processing 1000 x 1000 A-scans. The proposed parallelized multi-GPU computing framework enables processing at a computational speed faster than the GD-OCM image acquisition, thereby facilitating high-speed GD-OCM imaging in a clinical setting. Using two parallelized GPUs, the image processing of a 1 x 1 x 0.6 mm(3) skin sample was performed in about 13 s, and the performance was benchmarked at 6.5 s with four GPUs. This work thus demonstrates that 3-D GD-OCM data may be displayed in real-time to the examiner using parallelized GPU processing. (C) The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License.
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