Brain Misalignment Correction Based on Vascular Structures Segmentation in Tumor Surgery using Normalized Gradient Field

Elisée Ilunga Mbuyamba, Juan Gabriel Aviña Cervantes

Resumen


A possible treatment of brain tumor consists in a surgery performed by neurosurgeons who open the skull (called craniotomy). By navigating through the brain, they reach the tumor tissues and try to remove the maximum possible. The task is tricky because of the small operation field delimited by the craniotomy, also because of the difficulty to differentiate the brain healthy tissue surrounding the tumor and the brain misalignment that occurs. An additional tool for intraoperative imaging represents therefore a crucial element to guide the navigation through the brain safely and improve the resection task. Based on blood vessels segmentation, we proposed a methodology for the correction of brain displacement during resection. This misalignment of the brain was resolved by using a Normalized Gradient Field (NGF) that allows to register segmented vessels with a good accuracy. After to test our method on data phantom and patient data, the result were validated in an average of 90%.

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