Light source calibration for multispectral imaging in surgery.

International Journal of Computer Assisted Radiology and Surgery
Leonardo AyalaLena Maier-Hein

Abstract

Live intra-operative functional imaging has multiple potential clinical applications, such as localization of ischemia, assessment of organ transplantation success and perfusion monitoring. Recent research has shown that live monitoring of functional tissue properties, such as tissue oxygenation and blood volume fraction, is possible using multispectral imaging in laparoscopic surgery. While the illuminant spectrum is typically kept constant in laparoscopic surgery and can thus be estimated from preoperative calibration images, a key challenge in open surgery originates from the dynamic changes of lighting conditions. The present paper addresses this challenge with a novel approach to light source calibration based on specular highlight analysis. It involves the acquisition of low-exposure time images serving as a basis for recovering the illuminant spectrum from pixels that contain a dominant specular reflectance component. Comprehensive in silico and in vivo experiments with a range of different light sources demonstrate that our approach enables an accurate and robust recovery of the illuminant spectrum in the field of view of the camera, which results in reduced errors with respect to the estimation of functional tissue pro...Continue Reading

References

Dec 1, 1977·Scientific American·E H Land
May 5, 2016·International Journal of Computer Assisted Radiology and Surgery·Sebastian J WirkertLena Maier-Hein
Jun 11, 2017·IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society·Simone BiancoRaimondo Schettini
Oct 17, 2017·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Haris Ahmad KhanOlivier Laligant
Mar 10, 2018·Biomedizinische Technik. Biomedical Engineering·Axel KulckeGeorg Daeschlein
Jul 22, 2018·Biomedizinische Technik. Biomedical Engineering·Amadeus HolmerPeer W Kämmerer

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Citations

May 25, 2021·Journal of Physics D: Applied Physics· Michael EbnerTom Vercauteren

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