Design and validation of a high-speed hyperspectral laparoscopic imaging system.

Autor:	Pruitt K; University of Texas at Dallas, Center for Imaging and Surgical Innovation, Richardson, Texas, United States.; University of Texas at Dallas, Department of Bioengineering, Richardson, Texas, United States., Ma L; University of Texas at Dallas, Center for Imaging and Surgical Innovation, Richardson, Texas, United States.; University of Texas at Dallas, Department of Bioengineering, Richardson, Texas, United States., Rathgeb A; University of Texas at Dallas, Center for Imaging and Surgical Innovation, Richardson, Texas, United States.; University of Texas at Dallas, Department of Bioengineering, Richardson, Texas, United States., Gahan JC; University of Texas Southwestern Medical Center, Department of Urology, Dallas, Texas, United States., Johnson BA; University of Texas Southwestern Medical Center, Department of Urology, Dallas, Texas, United States., Strand DW; University of Texas Southwestern Medical Center, Department of Urology, Dallas, Texas, United States., Fei B; University of Texas at Dallas, Center for Imaging and Surgical Innovation, Richardson, Texas, United States.; University of Texas at Dallas, Department of Bioengineering, Richardson, Texas, United States.; University of Texas Southwestern Medical Center, Department of Radiology, Dallas, Texas, United States.
Jazyk:	angličtina
Zdroj:	Journal of biomedical optics [J Biomed Opt] 2024 Sep; Vol. 29 (9), pp. 093506. Date of Electronic Publication: 2024 Aug 13.
DOI:	10.1117/1.JBO.29.9.093506
Abstrakt:	Significance: Minimally invasive surgery (MIS) has shown vast improvement over open surgery by reducing post-operative stays, intraoperative blood loss, and infection rates. However, in spite of these improvements, there are still prevalent issues surrounding MIS that may be addressed through hyperspectral imaging (HSI). We present a laparoscopic HSI system to further advance the field of MIS. Aim: We present an imaging system that integrates high-speed HSI technology with a clinical laparoscopic setup and validate the system's accuracy and functionality. Different configurations that cover the visible (VIS) to near-infrared (NIR) range of electromagnetism are assessed by gauging the spectral fidelity and spatial resolution of each hyperspectral camera. Approach: Standard Spectralon reflectance tiles were used to provide ground truth spectral footprints to compare with those acquired by our system using the root mean squared error (RMSE). Demosaicing techniques were investigated and used to measure and improve spatial resolution, which was assessed with a USAF resolution test target. A perception-based image quality evaluator was used to assess the demosaicing techniques we developed. Two configurations of the system were developed for evaluation. The functionality of the system was investigated in a phantom study and by imaging ex vivo tissues. Results: Multiple configurations of our system were tested, each covering different spectral ranges, including VIS (460 to 600 nm), red/NIR (RNIR) (610 to 850 nm), and NIR (665 to 950 nm). Each configuration is capable of achieving real-time imaging speeds of up to 20 frames per second. RMSE values of 3.51 ± 2.03 % , 3.43 ± 0.84 % , and 3.47% were achieved for the VIS, RNIR, and NIR systems, respectively. We obtained sub-millimeter resolution using our demosaicing techniques. Conclusions: We developed and validated a high-speed hyperspectral laparoscopic imaging system. The HSI system can be used as an intraoperative imaging tool for tissue classification during laparoscopic surgery. (© 2024 The Authors.)
Databáze:	MEDLINE
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