1. From the Department of Radiology (T.T., M.Y., A.K.) and Department of Hematology and Medical Oncology (A.H.B.), Mayo Clinic, Scottsdale, Ariz; Department of Radiology, Okayama University Hospital, 2-5-1 Shikata-cho, Okayama 700-8558, Japan (T.T., R.I., S.K.); and Department of Radiology, Mayo Clinic, Rochester, Minn (A.T.F.).