title: Scintigraphic and MR perfusion imaging in preoperative evaluation for lung volume reduction surgery: pilot study results.
abstract: OBJECTIVE
  To compare MR perfusion imaging with perfusion scintigraphy in the evaluation of patients with pulmonary emphysema being considered for lung volume reduction surgery.
  
  
  METHODS
  Six patients with pulmonary emphysema and two normal individuals were evaluated by MR perfusion imaging, perfusion scintigraphy, and selective bilateral pulmonary angiography. MR images were obtained with an enhanced fast gradient recalled echo with three-dimensional Fourier transformation technique (efgre 3D) (6.3/1.3; flip angle, 30 degrees; field of view, 45-48 cm; matrix, 256 x 160). The presence or absence of perfusion defects in each segment was evaluated by two independent observers.
  
  
  RESULTS
  Using angiography as the gold standard, the sensitivity, specificity, and accuracy of MR perfusion imaging in detecting focal perfusion abnormalities were 90%, 87%, and 89%, respectively, while those of perfusion scintigraphy were 71%, 76%, and 71%, respectively. The diagnostic accuracy of MR perfusion imaging was significantly higher than that of scintigraphy (p<0.001, McNemar test). There was good agreement between two observers for MR perfusion imaging (kappa statistic, 0.66) and only moderate agreement for perfusion scintigraphy (kappa statistic, 0.51).
  
  
  CONCLUSIONS
  MR perfusion imaging is superior to perfusion scintigraphy in the evaluation of pulmonary parenchymal perfusion in patients with pulmonary emphysema.
authors: Department of Radiology, University of British Columbia and Vancouver Hospital and Health Sciences Center, Canada.
authors: T
authors: T
authors: Johkoh
authors: N L
authors: NL
authors: Müller
authors: P V
authors: PV
authors: Kavanagh
authors: Y
authors: Y
authors: Cartier
authors: J R
authors: JR
authors: Mayo
authors: N
authors: N
authors: Tomiyama
authors: T
authors: T
authors: Murakami
authors: H
authors: H
authors: Naito
authors: H
authors: H
authors: Nakamura
authors: H
authors: H
authors: Moriya
mesh_terms: D000328:Adult; D000368:Aged; D000792:Angiography; D003287:Contrast Media; D005260:Female; D005583:Fourier Analysis; D019786:Gadolinium DTPA; D006801:Humans; D007091:Image Processing, Computer-Assisted; D021621:Imaging, Three-Dimensional; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D010865:Pilot Projects; D011013:Pneumonectomy; D011300:Preoperative Care; D011652:Pulmonary Circulation / Q000502:physiology; D011656:Pulmonary Emphysema / Q000000981:diagnostic imaging* / Q000601:surgery; D011877:Radionuclide Imaging; D019275:Radiopharmaceuticals; D012680:Sensitivity and Specificity; D013223:Statistics as Topic; D013668:Technetium Tc 99m Aggregated Albumin
chemical_list: D003287:Contrast Media; D019275:Radiopharmaceuticals; D013668:Technetium Tc 99m Aggregated Albumin; D019786:Gadolinium DTPA