TY - RPRT TI - S-values calculated from a tomographic head/brain model for brain imaging. AU - Tsi-Chian Chao AU - X George Xu PY - 2004 DO - 10.1088/0031-9155/49/21/009 UR - https://pubmed.ncbi.nlm.nih.gov/15584531/ ID - 15584531 ER -