title: Evaluation of left atrial volumes using multidetector computed tomography: comparison with echocardiography.
abstract: OBJECTIVE
  To prospectively assess the relationship between the two different measurement methods for the evaluation of left atrial (LA) volume using cardiac multidetector computed tomography (MDCT) and to compare the results between cardiac MDCT and echocardiography.
  
  
  METHODS
  Thirty-five patients (20 men, 15 women; mean age, 60 years) underwent cardiac MDCT angiography for coronary artery disease. The LA volumes were measured using two different methods: the two dimensional (2D) length-based (LB) method measured along the three-orthogonal planes of the LA and the 3D volumetric threshold-based (VTB) method measured according to the threshold 3D segmentation of the LA. The results obtained by cardiac MDCT were compared with those obtained by echocardiography.
  
  
  RESULTS
  The LA end-systolic and end-diastolic volumes (LAESV and LAEDV) measured by the 2D-LB method correlated well with those measured by the 3D-VTB method using cardiac MDCT (r = 0.763, r = 0.786, p = 0.001). However, there was a significant difference in the LAESVs between the two measurement methods using cardiac MDCT (p < 0.05). The LAESV measured by cardiac MDCT correlated well with measurements by echocardiography (r = 0.864, p = 0.001), however with a significant difference (p < 0.01) in their volumes. The cardiac MDCT overestimated the LAESV by 22% compared to measurements by echocardiography.
  
  
  CONCLUSIONS
  A significant correlation was found between the two different measurement methods for evaluating LA volumes by cardiac MDCT. Further, cardiac MDCT correlates well with echocardiography in evaluating the LA volume. However, there are significant differences in the LAESV between the two measurement methods using cardiac MDCT and between cardiac MDCT and echocardiography.
authors.affiliation: Department of Radiology and Research Institute of Radiological Science, Yonsei University Health System, Yonsei University College of Medicine, Gangnam Severance Hospital, Seoul, Korea.
authors.forename: Hye Mi
authors.initials: HM
authors.lastname: Gweon
authors.forename: Sang Jin
authors.initials: SJ
authors.lastname: Kim
authors.forename: Tae Hoon
authors.initials: TH
authors.lastname: Kim
authors.forename: Sang Min
authors.initials: SM
authors.lastname: Lee
authors.forename: Yoo Jin
authors.initials: YJ
authors.lastname: Hong
authors.forename: Se-Joong
authors.initials: SJ
authors.lastname: Rim
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016279:Atrial Function, Left; D002306:Cardiac Volume; D003287:Contrast Media; D003324:Coronary Artery Disease / Q000000981:diagnostic imaging*; D004562:Electrocardiography / Q000379:methods; D005260:Female; D006325:Heart Atria / Q000000981:diagnostic imaging; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D011446:Prospective Studies; D011856:Radiographic Image Enhancement / Q000379:methods; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014283:Triiodobenzoic Acids; D014463:Ultrasonography
chemical_list: D003287:Contrast Media; D014283:Triiodobenzoic Acids; C054871:ioversol
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