Magnetic Resonance Thermography Using Water Proton Chemical Shift : Preliminary Results on Self-referenced Technique for Motion Compensation(PROCEEDINGS OF THE SCHOOL OF INFORMATION TECHNOLOGY AND ELECTRONICS OF TOKAI UNIVERSITY)

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Magnetic resonance imaging (MRI) is known to be the only modality for non-invasive imaging of internal organ temperature under thermal therapies. The thermal change in the phase evolution of the macroscopic magnetization vector has been obtained as the temperature indicator in the conventional method by subtracting the phase at each voxel before heating from that after heating. In the moving organ such as liver, however, the voxel-by-voxel phase subtraction process becomes problematic because of the change in the tissue position and the magnetic flux. To overcome this problem, we have proposed a "self-referenced" method, in which the reference phase value without thermal change is estimated based on the spatial continuity of the phase distribution around the treated tissue region. Our preliminary experimental results in this work demonstrated that the method is effective and viable for imaging liver temperature in vivo.
東海大学の論文