in vivo Radio-Frequency Heating Did Not Change Due to the Power Deposition from Similar 3T and 7T Head Coils

Devashish Shrivastava¹, Lynn Utecht¹, Jinfeng Tian¹, Rachana Visaria², John Hughes¹, University of Minnesota University of Minnesota Vaughan¹

Radio-frequency (RF) heating was measured using fluoroptic probes in the scalp; 5 mm, 10 mm, 15 mm, 20 mm and 25 mm in the brain; and rectum in eight anesthetized swine due to a continuous wave power deposition from similar 3T and 7T TEM head coils for three hours (N=4 for each coil). No significant difference was found between the heating produced due to the 3T and 7T coils in the brain and rectum.