Abstract #2794

Evaluation of a Template-Based B1 Field Correction Approach for 3T MRI Brain Images

Marcelo Adrian Castro¹, Jianhua Yao¹, Christabel Lee¹, Yuxi Pang^1,2, Eva Baker¹, John Butman¹, David Thomasson¹

¹Radiology and Imaging Sciences, National Institutes of Health, Bethesda, MD, USA; ²Philips Healthcare, Cleveland, OH, USA

A method to correct B1 field inhomogeneity in brain MRI images from a template B1 map is presented and applied to five volunteers. T1 maps are computed from T1-weighted images without B1 correction, with the proper B1 correction (reference T1 map), and using B1 maps from other subjects. The quality of a given correction is characterized by the percentage of voxels having a difference less than 10% with respect to the reference map. The T1 maps significantly improved when compared to the non-corrected ones. For each case the best correction was comparable to the reference T1 map.