title: Reproducibility of three-dimensional ultrasound endometrial volume measurements in patients with postmenopausal bleeding.
abstract: OBJECTIVE
  To evaluate the reproducibility of transvaginal three-dimensional (3D) endometrial volume measurement in patients with postmenopausal bleeding and to compare the reproducibility of this technique to that of two-dimensional (2D) endometrial thickness measurement.
  
  
  METHODS
  In a prospective, blinded study, transvaginal ultrasound examinations were performed in 51 consecutive patients with postmenopausal bleeding. Three-dimensional volume and 2D thickness measurements were made and intraobserver and interobserver reproducibility of each technique were assessed.
  
  
  RESULTS
  The intraobserver correlation of 3D endometrial volume measurement of the first observer was 0.97 and that of the second observer was 0.99. Thus, mean intraobserver correlation was 0.98. The mean interobserver correlation was 0.95 (0.95 vs. 0.96). There was no significant difference in reproducibility at different volume cut-offs. The mean intra- and interobserver correlation of endometrium volume measurements for five patients with endometrial carcinoma did not differ significantly from that for patients without carcinoma (0.98, 0.98 vs. 0.98, 0.95). The intraobserver correlation of 2D endometrial thickness measurements from the first observer was 0.71 and that from second observer 0.87. Thus, mean intraobserver correlation of the endometrial thickness measurements was 0.79. The mean interobserver correlation was 0.76 (0.84 vs. 0.70).
  
  
  CONCLUSIONS
  Endometrial volume and thickness measurements by 3D and 2D ultrasound, respectively, show good reproducibility but the reproducibility of 3D ultrasound is better.
authors.affiliation: Women's General Hospital, Department of Assisted Reproduction, Linz, Austria. cemil.yaman@li.lkh.ooe.gv.at
authors.forename: C
authors.initials: C
authors.lastname: Yaman
authors.forename: T
authors.initials: T
authors.lastname: Ebner
authors.forename: K
authors.initials: K
authors.lastname: Jesacher
authors.forename: G
authors.initials: G
authors.lastname: Obermayr
authors.forename: W
authors.initials: W
authors.lastname: Pölz
authors.forename: G
authors.initials: G
authors.lastname: Tews
mesh_terms: D004311:Double-Blind Method; D004717:Endometrium / Q000000981:diagnostic imaging* / Q000473:pathology; D005260:Female; D006801:Humans; D008875:Middle Aged; D017698:Postmenopause; D011446:Prospective Studies; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D018608:Ultrasonography, Doppler / Q000379:methods*; D014592:Uterine Hemorrhage / Q000000981:diagnostic imaging*