title: Reconstructed 4-chamber views compared with axial imaging for assessment of right ventricular enlargement on CT pulmonary angiograms.
abstract: OBJECTIVE
  To test the hypothesis that right enlargement assessed from right ventricular/left ventricular (RV/LV) dimension ratios of computed tomographic (CT) angiograms are equivalent irrespective of whether measured on axial views or reconstructed 4-chamber views.
  
  
  METHODS
  RV/LV dimension ratios were calculated from measurements on axial views, manually reconstructed 4-chamber views and computer generated reconstructed 4-chamber views of CT angiograms in 152 patients with PE.
  
  
  RESULTS
  Paired readings of the axial view and manually reconstructed 4-chamber view showed agreement with RV/LV > or =1 or RV/LV <1 in 114 of 127 (89.8%). Paired readings also showed agreement in 119 of 127 (93.7%) with axial views and computer generated reconstructed 4-chamber views. The McNemar test showed no statistically significant difference between assessments of RV enlargement (RV/LV > or = 1) with any method.
  
  
  CONCLUSIONS
  Right ventricular enlargement can be determined from axial views on CT angiograms, which are readily and immediately available, without obtaining 4-chamber reconstructed views.
authors.affiliation: Department of Research, St Joseph Mercy Oakland Hospital, Pontiac, MI 48341-5023, USA. steinp@trinity-health.org
authors.forename: Paul D
authors.initials: PD
authors.lastname: Stein
authors.forename: Fadi
authors.initials: F
authors.lastname: Matta
authors.forename: Abdo Y
authors.initials: AY
authors.lastname: Yaekoub
authors.forename: Lawrence R
authors.initials: LR
authors.lastname: Goodman
authors.forename: H Dirk
authors.initials: HD
authors.lastname: Sostman
authors.forename: John G
authors.initials: JG
authors.lastname: Weg
authors.forename: Charles A
authors.initials: CA
authors.lastname: Hales
authors.forename: Russell D
authors.initials: RD
authors.lastname: Hull
authors.forename: Kenneth V
authors.initials: KV
authors.lastname: Leeper
authors.forename: Afzal
authors.initials: A
authors.lastname: Beemath
authors.forename: Ibrahim M
authors.initials: IM
authors.lastname: Saeed
authors.forename: Pamela K
authors.initials: PK
authors.lastname: Woodard