Marcelo Adrian Castro1, Jianhua Yao1, Christabel Lee1, Yuxi Pang1,2, 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.