A dual-camera hyperspectral laparoscopic imaging system

Kelden Pruitt; Armand Rathgeb; Jeffrey C. Gahan; Brett A. Johnson; Douglas W. Strand; Baowei Fei

doi:10.1117/12.3005893

12 March 2024 A dual-camera hyperspectral laparoscopic imaging system

Kelden Pruitt, Armand Rathgeb, Jeffrey C. Gahan, Brett A. Johnson, Douglas W. Strand, Baowei Fei

Proceedings Volume 12831, Advanced Biomedical and Clinical Diagnostic and Surgical Guidance Systems XXII; 1283107 (2024) https://doi.org/10.1117/12.3005893
Event: SPIE BiOS, 2024, San Francisco, California, United States

Abstract

Minimally invasive surgery (MIS) has expanded broadly in the field of abdominal and pelvic surgery. However, there are still prevalent issues surrounding intracorporeal surgery, such as iatrogenic injury, anastomotic leakage, or the presence of positive tumor margins after resection. Current approaches to address these issues and advance laparoscopic imaging techniques often involve fluorescence imaging agents, such as indocyanine green (ICG), to improve visualization, but these have drawbacks. Hyperspectral imaging (HSI) is an emerging optical imaging modality that takes advantage of spectral characteristics of different tissues. Various applications include tissue classification and digital pathology. In this study, we developed a dual-camera system for high-speed hyperspectral imaging. This includes the development of a custom application interface and corresponding hardware setup. Characterization of the system was performed, including spectral accuracy and spatial resolution, showing little sacrifice in speed for the approximate doubling of the covered spectral range, with our system acquiring 29 spectral images from 460 to 850nm. Reference color tiles with various reflectance profiles were imaged and a RMSE of 3.56 ± 1.36% was achieved. Sub-millimeter resolution was shown at 7cm working distance for both hyperspectral cameras. Finally, we image ex vivo tissues, including porcine stomach, liver, intestine, and kidney with our system and use a high-resolution, radiometrically calibrated spectrometer for comparison and evaluation of spectral fidelity. The dual-camera hyperspectral laparoscopic imaging system can have immediate applications in various surgeries.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Kelden Pruitt, Armand Rathgeb, Jeffrey C. Gahan, Brett A. Johnson, Douglas W. Strand, and Baowei Fei "A dual-camera hyperspectral laparoscopic imaging system", Proc. SPIE 12831, Advanced Biomedical and Clinical Diagnostic and Surgical Guidance Systems XXII, 1283107 (12 March 2024); https://doi.org/10.1117/12.3005893

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