MURAGAKI Yoshihiro    Department   School of Medicine(Tokyo Women's Medical University Hospital), School of Medicine    Position   Visiting Professor
Language	Japanese
Title	Development of the Hybrid Marker System for Auto Registration in the MRI-guided Surgical Navigation (First study on clarification of the requirements)
Conference Type	Nationwide Conferences
Presentation Type	Speech
Lecture Type	General
Date	2007/11/04
Society abstract	日本コンピュータ外科学会誌 9(3),286-287 2007
Summary	In order to develop a new marker system for surgical navigation, authors examined the requirements. The markers, named "Hybrid marker", had two functions; one was a contrast agent for MRI, the other was a reflective ball for position measurement. The hybrid markers were planed to put between a receiver coil for MRI and a patient. For clarifying the area to put the markers, we analyzed former62clinical data, and fabricated a phantom to take images of MRI. In the analysis for clinical data, each area of craniotomy approximated a simple plane. Angle between the plane and a perpendicular line was calculated. Data showed to contain80% cases from40to69degrees, and the angle is31degrees when a tumor is located on the parietal lobe. The phantom successfully took both T1-weighted and T2-weighted images.