title: The value of a completely automatic ECG gated blood pool SPECT processing method for the estimation of global systolic left ventricular function.
abstract: OBJECTIVE
  Electrocardiographically gated blood pool SPECT (GBPS) is an interesting method for measuring left ventricular (LV) ejection fraction (LVEF) and volume. Recently, the availability of completely automatic GBPS processing software has been reported. We aimed to evaluate its reliability in measuring global LV systolic function. In addition, using the same population, we compared its reliability to that of three previously reported methods for processing GBPS.
  
  
  METHODS
  We studied the performances of the new GBPS system for the evaluation of LVEFs and volumes in 29 patients. The LVEF provided by the planar equilibrium radionuclide angiography (planarLAO) and LV volumes provided by radiological LV contrast angiography (X-rays) were used as 'gold standards'.
  
  
  RESULTS
  The new GBPS system failed in one patient. It shows good reproducibility for the measurement of both LVEF and volume. LVEF provided by this system is moderately correlated to planarLAO (r = 0.62; P < 0.001). The new GBPS constantly overestimates LVEF (P < 0.05). Results for LV volumes are moderately correlated to those obtained by X-ray investigation (r = 0.7; P < 0.001) but are significantly lower (P < 0.0001). There is a linear correlation between the average and the paired absolute difference for LV volumes (r = 0.52, P = 0.0001).
  
  
  CONCLUSIONS
  The new, completely automatic, GBPS processing software is an interesting, moderately reliable method for measuring LVEF and volume. The performance of the method is lower than that previously reported for the same population for the other three GBPS processing methods.
authors.affiliation: Department of Nuclear Medicine, Lariboisière University Hospital, Paris, France. domit.daou@lrb.ap-hop-paris.fr
authors.forename: Doumit
authors.initials: D
authors.lastname: Daou
authors.forename: Carlos
authors.initials: C
authors.lastname: Coaguila
authors.forename: Abdel
authors.initials: A
authors.lastname: Benada
authors.forename: Micheline
authors.initials: M
authors.lastname: Razzouk
authors.forename: Mohamed
authors.initials: M
authors.lastname: Haidar
authors.forename: Patrice
authors.initials: P
authors.lastname: Colin
authors.forename: Rachida
authors.initials: R
authors.lastname: Lebtahi
authors.forename: Michel
authors.initials: M
authors.lastname: Slama
authors.forename: Domique Le
authors.initials: DL
authors.lastname: Guludec
mesh_terms: D000465:Algorithms; D002306:Cardiac Volume; D004562:Electrocardiography / Q000379:methods*; D015637:Gated Blood-Pool Imaging / Q000379:methods*; D006352:Heart Ventricles / Q000000981:diagnostic imaging*; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012984:Software; D013318:Stroke Volume; D015899:Tomography, Emission-Computed, Single-Photon / Q000379:methods*; D018487:Ventricular Dysfunction, Left / Q000175:diagnosis / Q000000981:diagnostic imaging*