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file:PTA.jpg|Figure 1: Percutaneous Transluminal Angioplasty (PTA) of the superficial femoral artery (SFA). Left image: subtotal calcified occlusion a) with many collaterals b); Right image: good patency after ballon PTA c)
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→Interventional Procedures
After CT, Interventional radiology is the second largest collective source of medical radiation exposure and, together with nuclear medicine the highest source of exposure to healthcare providers. ICRP has provided practical advice for physicians and other healthcare providers on the protection of patients and themselves involved in the interventions, for example in the following publications:
[[file:PTA.jpg|200px|thumb|'''Figure 1:''' Percutaneous Transluminal Angioplasty (PTA) of the superficial femoral artery (SFA). Left image: subtotal calcified occlusion a) with many collaterals b); Right image: good patency after ballon PTA]]
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Interventions are usually guided by fluoroscopy. Radiographic cine series or stored images from fluoroscopy are taken to document the outcome of diagnosis or treatment. Interventions can also be guided by computed tomography (CT) imaging, with images taken while the interventionalist steps behind a shield or out of the room, or by CT fluoroscopy, in which the interventionalist stays at the patient for obtaining images during device manipulation.
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