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SHR Neuro Cancer Cardio Lipid Metab Microb

Chalopin, C; Pfahl, A; Köhler, H; Knospe, L; Maktabi, M; Unger, M; Jansen-Winkeln, B; Thieme, R; Moulla, Y; Mehdorn, M; Sucher, R; Neumuth, T; Gockel, I; Melzer, A.
Alternative intraoperative optical imaging modalities for fluorescence angiography in gastrointestinal surgery: spectral imaging and imaging photoplethysmography.
Minim Invasive Ther Allied Technol. 2023; 1-11. Doi: 10.1080/13645706.2022.2164469
Web of Science PubMed FullText FullText_MUG

Co-authors Med Uni Graz: Sucher Robert
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Abstract:: INTRODUCTION: Intraoperative near-infrared fluorescence angiography with indocyanine green (ICG-FA) is a well-established modality in gastrointestinal surgery. Its main drawback is the application of a fluorescent agent with possible side effects for patients. The goal of this review paper is the presentation of alternative, non-invasive optical imaging methods and their comparison with ICG-FA. MATERIAL AND METHODS: The principles of ICG-FA, spectral imaging, imaging photoplethysmography (iPPG), and their applications in gastrointestinal surgery are described based on selected published works. RESULTS: The main applications of the three modalities are the evaluation of tissue perfusion, the identification of risk structures, and tissue segmentation or classification. While the ICG-FA images are mainly evaluated visually, leading to subjective interpretations, quantitative physiological parameters and tissue segmentation are provided in spectral imaging and iPPG. The combination of ICG-FA and spectral imaging is a promising method. CONCLUSIONS: Non-invasive spectral imaging and iPPG have shown promising results in gastrointestinal surgery. They can overcome the main drawbacks of ICG-FA, i.e. the use of contrast agents, the lack of quantitative analysis, repeatability, and a difficult standardization of the acquisition. Further technical improvements and clinical evaluations are necessary to establish them in daily clinical routine.
Find related publications in this database (Keywords): Fluorescence angiography; indocyanine green; spectral imaging; photoplethysmography; real-time; intraoperative; tissue perfusion