title: Pelvic digital subtraction catheter angiography--are routine oblique projections necessary?
abstract: The oblique projection is used widely in imaging of the lower vascular tree. Much of the evidence justifying the oblique projection is anecdotal. This study compares the sensitivity of the anteroposterior (AP) projection alone in lower limb vascular catheter angiography to that combined with the oblique projection. 110 digitally subtracted angiograms were analysed initially on AP and subsequently on oblique views. Oblique imaging increases confidence, demonstrates stenoses not seen on AP and changes the diagnosis. This supports the use of the oblique projection in lower limb vascular interventional imaging.
authors.affiliation: John Radcliffe Hospital, Oxford Radcliffe NHS Trust, Oxford, United Kingdom. rane@cantab.net
authors.forename: Neil
authors.initials: N
authors.lastname: Rane
authors.forename: Atique
authors.initials: A
authors.lastname: Imam
authors.forename: Peter
authors.initials: P
authors.lastname: Foley
authors.forename: Grace
authors.initials: G
authors.lastname: Timmons
authors.forename: Raman
authors.initials: R
authors.lastname: Uberoi
mesh_terms: D000465:Algorithms; D015901:Angiography, Digital Subtraction / Q000295:instrumentation / Q000379:methods*; D002404:Catheterization / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D010386:Pelvic Neoplasms / Q000000981:diagnostic imaging*; D010388:Pelvis / Q000000981:diagnostic imaging*; D019047:Phantoms, Imaging; D011856:Radiographic Image Enhancement / Q000379:methods; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity