title: Follow-up of coronary artery bypass graft patency: diagnostic efficiency of high-pitch dual-source 256-slice MDCT findings.
abstract: OBJECTIVE
  Our aim was to evaluate the diagnostic accuracy of 256-slice, high-pitch mode multidetector computed tomography (MDCT) for coronary artery bypass graft (CABG) patency.
  
  
  METHODS
  Eighty-eight patients underwent 256-slice MDCT angiography to evaluate their graft patency after CABG surgery using a prospectively synchronized electrocardiogram in the high-pitch spiral acquisition mode. Effective radiation doses were calculated. We investigated the diagnostic accuracy of high-pitch, low-dose, prospective, electrocardiogram-triggering, dual-source MDCT for CABG patency compared with catheter coronary angiography imaging findings.
  
  
  RESULTS
  A total of 215 grafts and 645 vessel segments were analyzed. All graft segments had diagnostic image quality. The proximal and middle graft segments had significantly (P < 0.05) better mean image quality scores (1.18 ± 0.4) than the distal segments (1.31 ± 0.5). Using catheter coronary angiography as the reference standard, high-pitch MDCT had the following sensitivity, specificity, positive predictive value, and negative predictive value of per-segment analysis for detecting graft patency: 97.1%, 99.6%, 94.4%, and 99.8%, respectively.
  
  
  CONCLUSIONS
  In conclusion, MDCT can be used noninvasively with a lower radiation dose for the assessment of restenosis in CABG patients.
authors.affiliation: From the *Mehmet Akif Ersoy Training and Research Hospital, Department of Radiology, İstanbul; †Atatürk University, School of Medicine, Department of Radiology; and ‡Regional Training and Research Hospital, Department of Radiology, Erzurum;§Mehmet Akif Ersoy Training and Research Hospital, Department of Cardiology, İstanbul;∥Şifa University, School of Medicine, Department of Radiology, İzmir; and ¶Atatürk University, School of Medicine, Department of Cardiology, Erzurum, Turkey.
authors.forename: Zeyneb
authors.initials: Z
authors.lastname: Yuceler
authors.forename: Mecit
authors.initials: M
authors.lastname: Kantarci
authors.forename: Ihsan
authors.initials: I
authors.lastname: Yuce
authors.forename: Yesim
authors.initials: Y
authors.lastname: Kizrak
authors.forename: Ummugulsum
authors.initials: U
authors.lastname: Bayraktutan
authors.forename: Hayri
authors.initials: H
authors.lastname: Ogul
authors.forename: Adem
authors.initials: A
authors.lastname: Kiris
authors.forename: Omer
authors.initials: O
authors.lastname: Celik
authors.forename: Berhan
authors.initials: B
authors.lastname: Pirimoglu
authors.forename: Berhan
authors.initials: B
authors.lastname: Genc
authors.forename: Fuat
authors.initials: F
authors.lastname: Gundogdu
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D055424:Cardiac-Gated Imaging Techniques; D017023:Coronary Angiography; D001026:Coronary Artery Bypass; D004562:Electrocardiography; D005260:Female; D005500:Follow-Up Studies; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D061330:Multidetector Computed Tomography / Q000379:methods*; D011237:Predictive Value of Tests; D011829:Radiation Dosage; D011857:Radiographic Image Interpretation, Computer-Assisted; D012680:Sensitivity and Specificity; D014654:Vascular Patency