Temperature and SAR measurement errors in the evaluation of metallic linear structures heating during MRI using fluoroptic probes.

摘要: The purpose of this work is to evaluate the error associated with temperature and SAR measurements using fluoroptic® probes on pacemaker (PM) leads during magnetic resonance imaging (MRI). We performed leads, excited a 25, 64, 128 MHz current. PM lead tip heating was measured thermometer (Luxtron, Model 3100, USA). Different contact configurations between pigmented portion probe were investigated find position minimizing underestimation. A computer model used estimate made by in measurement. transversal minimizes underestimation for SAR. This also has lowest error. For other positions, maximum can be as high −45%, whereas −54%. MRI evaluations should use error, need accompanied thorough uncertainty budget errors specified.