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Abstract #3239

Feasibility of MRI-based polymer gel dosimetry using parallel RF transmission with multiple RF source

Sang-Young Kim 1 , Hyeonman Baek 2 , Jung-Hoon Lee 1 , Do-Wan Lee 1 , Jin-Young Jung 1 , and Bo-Young Choe 1

1 Department of Biomedical Engineering, The Catholic University of Korea, Seoul, Seoul, Korea, 2 Korea Basic Science Institute, Seoul, Korea

We present the feasibility of use of the parallel RF transmission with multiple RF source (MultiTransmit) imaging in MRI-based polymer gel dosimetry. The image quality and B1 field inhomogeneity between conventional and MultiTransmit MR imaging were compared. Finally, the estimated R2 uncertainty, (R2) and dosimetric performance (dose resolution) between two methods were compared. Improved image quality and B1 field homogeneity results in lower (R2) on the MultiTransmit images than on the conventional images. We demonstrated the feasibility of MultiTransmit MR imaging for introducing gel dosimetry into clinical routine, suggesting that MultiTransmit MR imaging has potential benefits for 3D gel dosimetry.

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