title: A metric ruler for digital subtraction angiography.
mesh_terms: D000005:Abdomen / Q000098:blood supply*; D000792:Angiography / Q000295:instrumentation / Q000379:methods*; D003201:Computers; D003626:Data Display; D005471:Fluoroscopy; D006801:Humans; D008792:Metric System; D011860:Radiography, Abdominal