title: [The effect of the imaging geometry of angiographic equipment on the measurement of vessel diameters: the significance for PTA and stent implantation].
abstract: The diameter of arteries in the angiogram is determined by the geometry of the angiographic unit and the position of the vessel in the body section. The position of the arteries in the middle portion of the pelvis is subjected to a wide variability due to their curved course, and cannot be precisely predicted even if the individual body diameter is known. Magnification of the pelvic arteries on a.p. angiograms typically ranges between 30 and 40%, and increases with patient thickness. Therefore, PTA of the pelvic arteries produces overdilatation, even if the balloon diameter is smaller than the vessel diameter measured on the a.p. film. If the balloon diameter exceeds the measured vessel diameter by 1 or 1.5 millimetres, vessel overdilatation may reach up to 70% of the original size.
authors.affiliation: Institut und Poliklinik für Radiologische Diagnostik, Universität zu Köln.
authors.forename: K F
authors.initials: KF
authors.lastname: Neufang
authors.forename: Y
authors.initials: Y
authors.lastname: Girards
authors.forename: W
authors.initials: W
authors.lastname: Gross-Fengels
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000792:Angiography / Q000295:instrumentation; D000800:Angioplasty, Balloon; D001158:Arteries / Q000033:anatomy & histology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010388:Pelvis / Q000098:blood supply*; D015607:Stents
vernacular_title: Einfluss der Abbildungsgeometrie von Angiographie-Anlagen auf die Messung der Gefässdurchmesser: Bedeutung für PTA und Stentimplantationen.