Subtraction radiology by electro-optical means.
D003287:Contrast Media; D004582:Electronics, Medical; D008027:Light; D008991:Monitoring, Physiologic; D055095:Optics and Photonics; D011859:Radiography; D012886:Skull / Q000000981:diagnostic imaging; D013382:Subtraction Technique; D013679:Technology, Radiologic / Q000295:instrumentation; D013690:Television
D003287:Contrast Media