title: Device for correlating CT and radiation therapy portal images.
mesh_terms: D006801:Humans; D011878:Radiotherapy / Q000295:instrumentation*; D013945:Thymoma / Q000000981:diagnostic imaging / Q000532:radiotherapy; D013953:Thymus Neoplasms / Q000000981:diagnostic imaging / Q000532:radiotherapy; D014057:Tomography, X-Ray Computed / Q000295:instrumentation* / Q000379:methods