MR-based attenuation correction for PET/MRI neurological studies with continuous-valued attenuation coefficients for bone through a conversion from R2* to CT-Hounsfield units. - Meher R. Juttukonda; Bryant G. Mersereau; Yasheng Chen; Yi Su 004; Brian G. Rubin; Tammie L. S. Benzinger; David S. Lalush; Hongyu An (NeuroImage, 2015)