title: Comparison among tomographic radionuclide ventriculography algorithms for computing left and right ventricular normal limits.
abstract: BACKGROUND
  Various algorithms have been developed to compute right ventricular (RV) and left ventricular (LV) end-diastolic volumes, end-systolic volumes, and ejection fractions (EF) from tomographic radionuclide ventriculography (TRV). The aims of this investigation were to establish sex-specific normal limits, to determine whether different algorithms produce the same normal values, and to compare TRV normal limits vs for magnetic resonance imaging values in the literature.
  
  
  METHODS
  Fifty-one healthy volunteers (29 men, 22 women) were studied prospectively. All subjects had normal electrocardiograms and echocardiographic examinations, and underwent both planar radionuclide ventriculography and TRV. Four algorithms were used to process TRV data.
  
  
  RESULTS
  Normal limits for most functional parameters differed significantly from one algorithm to another. Volumes were greater in men, but no statistically significant differences were found between men and women for LV EF or RV EF values for any method. Normal LV and RV EF and volumes were largely consistent with the literature for cardiac magnetic resonance imaging.
  
  
  CONCLUSIONS
  Ventricular measurements differ significantly among TRV algorithms. Therefore, it is important to apply sex-specific normal limits that are specific to a given TRV algorithm in interpreting LV and RV EF and volume measurements for each patient.
authors.affiliation: Division of Nuclear Medicine, OLV Hospital, Aalst, Belgium. pieter.de.bondt@olvz-aalst.be
authors.forename: Pieter
authors.initials: P
authors.lastname: De Bondt
authors.forename: Kenneth J
authors.initials: KJ
authors.lastname: Nichols
authors.forename: Olivier
authors.initials: O
authors.lastname: De Winter
authors.forename: Johan
authors.initials: J
authors.lastname: De Sutter
authors.forename: Marc
authors.initials: M
authors.lastname: Vanderheyden
authors.forename: Olakunle O
authors.initials: OO
authors.lastname: Akinboboye
authors.forename: Rudi Andre
authors.initials: RA
authors.lastname: Dierckx
mesh_terms: D000328:Adult; D000368:Aged; D000465:Algorithms; D001331:Automation; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012016:Reference Values; D012737:Sex Factors; D014057:Tomography, X-Ray Computed / Q000379:methods*; D016277:Ventricular Function, Left; D016278:Ventricular Function, Right