Patent ID: 6628978
Filing Date: 2003-09-30
Classification: A61B

Abstract:
A biomagnetism measurement device comprising magnetism sensors each including a super conducting quantum interference device; a dewar which incorporates the magnetism sensors and which is filled with a coolant so as to maintain the magnetism sensors in a super conducting state; and a patient supporting apparatus for supporting a patient, characterized in that the biomagnetism measurement device further comprises:a first light projecting means for projecting a first light beam pattern which spreads only in a direction of an X axis of the dewar; a second light projecting means for projecting a second light beam pattern which spreads only in a direction of a Y axis of the dewar; and a mechanism which causes to cross the first light beam pattern from the first light projecting means with the second light beam pattern from the second light projecting means to produce a cross-shaped light beam pattern, and to project the cross-shaped light beam pattern onto the supported patient.