MURAGAKI Yoshihiro    Department   School of Medicine(Tokyo Women's Medical University Hospital), School of Medicine    Position   Visiting Professor
Language	English
Title	Presenting a Simple Method of Brain Shift Estimation for Neuronavigations and Considering its Practicality
Conference	2019 IEEE/SICE International Symposium on System Integration (SII)
Conference Type	Nationwide Conferences
Publisher and common publisher	◎CHEN Xiaoshuai , SHIRAI Ryosuke , MASAMUNE Ken, TAMURA Manabu, MURAGAKI Yoshihiro, KONNO Atsushi
Date	2019/01/14
Venue (city and name of the country)	Paris, France
Society abstract	2019 IEEE/SICE International Symposium on System Integration (SII) 112-117
Summary	In neurosurgeries, even a small mistake may pose a serious risk to a patient. Hence, a neuronavigation has been used in neurosurgeries to find accurate spatial position of lesion. However, the neuronavigation localizes the lesion based on preoperative medical images, therefore the brain deformation during a surgery, which is referred to as brain shift, has been a serious problem in the neuronavigation. Brain shift occurs in craniotomy and it is caused by gravity, cerebrospinal fluid (CSF) leakage, and so on. In order to present accurate information on a neuronavigation during surgery, a simple brain shift estimation method is proposed to predict and reproduce intraoperative brain deformation. The proposed method is validated by using a Finite Element (FE) brain model generated from medical images of a real patient. A brain shift simulation using a patient brain model is conducted. The comparison of the simulation result and the intraoperative medical images of the patient show that the simulation can reproduce the brain shift accurately. Most earlier studies have verified their brain shift estimation methods in 2D coordinate by using the 2D medical images. In this study, the accuracy was verified in x-y-z coordinate by using the 3D models.