1. From the Departments of Medical Physics (R.B.), Radiation Oncology (S.S., M.V.V.), and Radiology (M.d.R.P.J.), Complejo Hospitalario Universitario de Albacete (CHUA), C/ Hnos Falcó 37, 02006 Albacete, Spain; Renewable Energy Research Institute, University of Castilla-La Mancha, Albacete, Spain (J.C.V., M.C.G.); and Mansilla Diagnóstico por Imagen, Albacete, Spain (F.M.L.).