title: New hybrid reformations of peripheral CT angiography: do we still need axial images?
abstract: OBJECTIVE
  To quantify the detectability of peripheral artery stenosis on hybrid CT angiography (CTA) reformations.
  
  
  METHODS
  Hybrid reformations were developed by combining multipath curved planar reformations (mpCPR) and maximum intensity projections (MIP). Fifty peripheral CTAs were evaluated twice: either with MIP, mpCPR and axial images or with hybrid reformations only. Digital subtraction angiography served as gold standard.
  
  
  RESULTS
  Using hybrid reformations, two independent readers detected 88.0% and 81.3% of significant stenosis, respectively. However, CTA including axial images detected statistically significant more lesions (98%).
  
  
  CONCLUSIONS
  Peripheral CTA reading including axial images is still recommended. Further improvement of these hybrid reformations is necessary.
authors.affiliation: Section of Cardiovascular and Interventional Radiology, Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria. Electronic address: ruediger.schernthaner@meduniwien.ac.at.
authors.forename: Ruediger Egbert
authors.initials: RE
authors.lastname: Schernthaner
authors.affiliation: Section of Cardiovascular and Interventional Radiology, Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria. Electronic address: florian.wolf@meduniwien.ac.at.
authors.forename: Florian
authors.initials: F
authors.lastname: Wolf
authors.affiliation: Institute of Computer Graphics and Algorithms, Technical University of Vienna, Favoritenstraße 9-11, 1040 Vienna, Austria. Electronic address: gm@cg.tuwien.ac.at.
authors.forename: Gabriel
authors.initials: G
authors.lastname: Mistelbauer
authors.affiliation: Section of Cardiovascular and Interventional Radiology, Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria. Electronic address: michael.weber@meduniwienac.at.
authors.forename: Michael
authors.initials: M
authors.lastname: Weber
authors.affiliation: Commission for Scientific Visualization, Austrian Academy of Sciences, Donau-City Straße 1, 1220 Vienna, Austria. Electronic address: milos.sramek@oeaw.ac.at.
authors.forename: Milos
authors.initials: M
authors.lastname: Sramek
authors.affiliation: Institute of Computer Graphics and Algorithms, Technical University of Vienna, Favoritenstraße 9-11, 1040 Vienna, Austria. Electronic address: groeller@cg.tuwien.ac.at.
authors.forename: Eduard
authors.initials: E
authors.lastname: Groeller
authors.affiliation: Section of Cardiovascular and Interventional Radiology, Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria. Electronic address: christian.loewe@meduniwien.ac.at.
authors.forename: Christian
authors.initials: C
authors.lastname: Loewe
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015901:Angiography, Digital Subtraction / Q000379:methods*; D001157:Arterial Occlusive Diseases / Q000000981:diagnostic imaging*; D003251:Constriction, Pathologic / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods
keywords: CT angiography; Peripheral arterial occlusive disease; Postprocessing; Three-dimensional reformations