ISEKI Hiroshi    Department   Research Institutes and Facilities, Research Institutes and Facilities    Position
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.