Reducing SAR and enhancing cerebral signal-to-noise ratio with high permittivity padding at 3 T.
Previous works have shown that placement of a high-dielectric pad can improve image intensity in a region adjacent to the pad, or that placement of dielectric pads around a large surface of the head can improve image homogeneity on an entire plane through the head in high-field MRI. Here, experimental results show that use of high-dielectric pads around the human head can reduce the required input radiofrequency power by 50% while enhancing image signal-to-noise ratio by 20-40% throughout the cerebrum at 3 T. Thus, dielectric pads may be used to provide a relatively simple and low-cost method for improving quality and safety of MRI in a variety of applications at 3 T.
Departments of Radiology, The Pennsylvania State University College of Medicine, 500 University Drive, Hershey, Pennsylvania, USA. qyang@psu.edu
Qing X
QX
Yang
Jianli
J
Wang
Jinghua
J
Wang
Christopher M
CM
Collins
Chunsheng
C
Wang
Michael B
MB
Smith
D001921:Brain / Q000033:anatomy & histology*; D003198:Computer Simulation; D006801:Humans; D007089:Image Enhancement / Q000295:instrumentation / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000295:instrumentation / Q000379:methods*; D011846:Radio Waves
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