<unk>  <unk>  is a fluoroscopy technique used in interventional radiology to clearly visualize blood vessels in a bony or dense soft tissue environment. Images are produced using contrast medium by<unk> g a "pre-contrast image" or mask from subsequent images, once the contrast medium has been introduced into a structure. Hence the term<unk> .<unk>  angiography was first described in 1935 and in English sources in 1962 as a manual technique.<unk>  technology made<unk>  practical starting in the 1970s.
Digital subtraction angiography
Microangiography
Digital variance angiography
Radionuclide angiography
Rotational angiography
Intravascular imaging
Computed tomography angiography
Magnetic resonance angiography