title: Myocardial perfusion imaging using adenosine-induced stress dual-energy computed tomography of the heart: comparison with cardiac magnetic resonance imaging and conventional coronary angiography.
abstract: OBJECTIVE
  To evaluate the feasibility and diagnostic accuracy of adenosine-stress dual-energy computed tomography (DECT) for detecting haemodynamically significant stenosis causing reversible myocardial perfusion defect (PD) compared with stress perfusion magnetic resonance imaging (SP-MRI) and conventional coronary angiography (CCA).
  
  
  METHODS
  Fifty patients with known coronary artery disease (CAD) detected by dual-source CT (DSCT) were investigated by contrast-enhanced, stress DECT with high- and low-energy x-ray spectra settings during adenosine infusion. A colour-coded iodine map was used for evaluation of myocardial PDs compared with rest DSCT perfusion images. Reversible myocardial PDs according to the stress DECT/rest DSCT were compared with SP-MRI on a segmental basis and CCA on a vascular territorial basis.
  
  
  RESULTS
  A total of 697 myocardial segments and 123 vascular territories of 41 patients were analysed. Three hundred one segments and 72 vascular territories in 38 patients showed reversible PDs on stress DECT. Stress DECT had 89% sensitivity, 78% specificity and 82% accuracy for detecting segments with reversible PDs seen on SP-MRI (n=28). Compared with CCA (n=41), stress DECT had 89% sensitivity, 76% specificity and 83% accuracy for the detection of vascular territories with reversible myocardial PDs that had haemodynamically relevant CAD.
  
  
  CONCLUSIONS
  Adenosine stress DECT can identify stress-induced myocardial PD in patients with CAD.
authors.affiliation: Department of Radiology, Konkuk University Hospital, Konkuk University School of Medicine, 4-12 Hwayang-dong, Gwangjin-gu, Seoul, 143-729, Korea. ksm9723@yahoo.co.kr
authors.forename: Sung Min
authors.initials: SM
authors.lastname: Ko
authors.forename: Jin Woo
authors.initials: JW
authors.lastname: Choi
authors.forename: Meong Gun
authors.initials: MG
authors.lastname: Song
authors.forename: Je Kyoun
authors.initials: JK
authors.lastname: Shin
authors.forename: Hyun Kun
authors.initials: HK
authors.lastname: Chee
authors.forename: Hyun Woo
authors.initials: HW
authors.lastname: Chung
authors.forename: Dong Hun
authors.initials: DH
authors.lastname: Kim
mesh_terms: D000241:Adenosine; D000368:Aged; D017023:Coronary Angiography; D003324:Coronary Artery Disease / Q000175:diagnosis*; D025401:Echocardiography, Stress; D005260:Female; D006321:Heart / Q000000981:diagnostic imaging*; D006801:Humans; D018810:Magnetic Resonance Angiography; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed
chemical_list: D000241:Adenosine