Localization and Local Motion Magnification of Pulsatile Regions in Endoscopic Surgery Videos

Localization of neurovascular bundles or vessels is critical in endoscopic surgery. It still remains challenging to identify neurovascular bundles and vessels due to limited field-of-view and tactile perception loss. This paper presents a new framework for local motion magnification of the pulsatile region in endoscopic surgical videos, which can help surgeons localize these pulsatile regions from complex surgical fields. Our method consists of an autocorrelated dynamic linear model, a pulsatile region localization module, and a local motion magnification module. Specifically, the autocorrelated dynamic linear model and pulsatile region localization module can extract periodic features and position information of pulsatile regions. Then, the local motion magnification module performs local motion magnification, minimizing post-magnification artifacts. Importantly, our method also avoids distorting the surgical instruments during magnification. Experimental validations on both synthetic and clinical surgical videos demonstrate that our method outperforms the existing methods in both qualitative and quantitative assessments.