title: Accuracy of prostate volume measurements in vitro using three-dimensional ultrasound.
abstract: OBJECTIVE
  We assessed the ability of a three-dimensional (3D) ultrasound imaging system to measure accurately prostate volume.
  
  
  METHODS
  Multiple two-dimensional ultrasound images of cadaver prostates scanned in a water bath were reconstructed into three-dimensional (3D) images. The volumes of the prostates were calculated from these 3D images and compared with the actual volumes. Multiple 3D ultrasound volume readings were evaluated for precision.
  
  
  RESULTS
  The slope of the best-fit line correlating 3D ultrasound estimated volume and true volume was 1.006 +/- 0.007. The average error was 0.36 +/- 1.17 cm3; the coefficient of determination (r2), which is the measure of the straight-line relationship, was .9997; and the standard error was 1.15 cm3.
  
  
  CONCLUSIONS
  Three-dimensional ultrasound images accurately reflect true prostate volumes measured in vitro.
authors.affiliation: Department of Diagnostic Radiology and Nuclear Medicine, University Hospital, University of Western Ontario, London, Canada.
authors.forename: T L
authors.initials: TL
authors.lastname: Elliot
authors.forename: D B
authors.initials: DB
authors.lastname: Downey
authors.forename: S
authors.initials: S
authors.lastname: Tong
authors.forename: C A
authors.initials: CA
authors.lastname: McLean
authors.forename: A
authors.initials: A
authors.lastname: Fenster
mesh_terms: D002102:Cadaver; D006801:Humans; D066298:In Vitro Techniques; D008297:Male; D011467:Prostate / Q000033:anatomy & histology* / Q000000981:diagnostic imaging / Q000473:pathology; D011470:Prostatic Hyperplasia / Q000000981:diagnostic imaging / Q000473:pathology; D011471:Prostatic Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology; D012680:Sensitivity and Specificity; D014463:Ultrasonography / Q000379:methods*