The reproducibility of endometrial volume acquisition and measurement with the VOCAL‐imaging program

Raine‐Fenning, N.; Campbell, Bruce; Collier, Jacqueline; Brincat, Mark; Johnson, I. R.

doi:10.1046/j.0960-7692.2001.00608.x

Cited by 112 publications

(107 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…More recently, 3‐D ultrasonography has proven to be more accurate in the evaluation of objects with irregularities, as well as providing more reliable volume estimates than 2D ultrasonography 7 8 Reproducibility of Virtual Organ Computed‐aided AnaLysis” (VOCAL TM ) as an accurate modality to determine volume has also been extensively researched 9 10 …”

Section: Introductionmentioning

confidence: 99%

Estimation of uterine volume: A comparison between Viewpoint and 3D ultrasound estimation in women undergoing laparoscopic hysterectomy

Casikar

Mongelli

Reid

et al. 2015

Australas J Ultrason Med

View full text Add to dashboard Cite

Objectives: To assess the three‐dimensional (3D) tool, Virtual Organ Computed‐aided AnaLysis™ (VOCAL) in the calculation of pre‐operative uterine volume and to correlate the measurements with those obtained with Viewpoint, using uterine dry weight (UDW) as the gold standard. Methods: Prospective observational study of women consented for a laparoscopic hysterectomy (LH) at Nepean Hospital between October 2008 and November 2011. All women underwent detailed transvaginal scan (TVS) at the pre‐operative assessment. Two‐dimensional (D) images of the uterus were obtained both in the mid‐sagittal and transverse planes. 3D volumetric acquisitions were also obtained for each uterus in the mid‐sagittal plane. 2D measurements of the uterus in millimetres (Anterio‐Posterior, longitudinal and transverse) were recorded in Viewpoint software package (GE Healthcare ViewPoint, Germany); which then generated an estimated uterine volume (ml) using the ellipsoid formula. The 3D uterine volumetric datasets were reviewed using SonoView Pro and uterine volumes were estimated with off‐line processing using VOCAL™. The gold standard for comparison was UDW in grams (g), measured by the histopathologist at the time of analysis of the LH specimens. The relationship between the estimated uterine volumes and actual UDW was evaluated using correlation analysis. P‐values were calculated to ascertain the significance of these findings; P values &< 0.05 represented statistical significance. Results: 76 women underwent LH during the study period. Complete data were available in 96% (74/76) of cases. The mean age of the women was 43.7 years and 92% were multiparous. The mean Viewpoint uterine volume was 283 ml, the mean VOCAL™ uterine volume was 249 ml and the mean UDW was 295 g. There was a significant correlation between UDW and estimated uterine volumes both for Viewpoint (R = 0.83, P < 0.001) and VOCAL™ (R = 0.97, P < 0.001), respectively. Viewpoint systematically overestimated weight by 43.1 g, whereas VOCAL™ underestimated by an average of 42.4 g, and this difference was statistically significant (P < 0.001). In terms of absolute values, the mean prediction error for VOCAL™ was −18.0 g and for Viewpoint it was 27.6 g (P &< 0.0001). Conclusion: VOCAL™ was found to be significantly more accurate than Viewpoint in the estimation of uterine volumes, and it was better correlated with UDW.

show abstract

Section: Introductionmentioning

confidence: 99%

Estimation of uterine volume: A comparison between Viewpoint and 3D ultrasound estimation in women undergoing laparoscopic hysterectomy

Casikar

Mongelli

Reid

et al. 2015

Australas J Ultrason Med

View full text Add to dashboard Cite

show abstract

“…[19][20][21] According to our preliminary results, the rotation plane and angle do not significantly affect the reproducibility of In this study, we have evaluated the reproducibility of the measurements of ovarian volume, number of antral follicles, and power Doppler indices with the VOCAL imaging program. Groups in 2 functional stages have been assessed: a group of women examined after long pituitary suppression with a GnRH analogue and a second group analyzed after the ovarian stimulation with recombinant FSH.…”

Section: Discussionmentioning

confidence: 99%

Intraobserver and Interobserver Reproducibility of Ovarian Volume, Antral Follicle Count, and Vascularity Indices Obtained With Transvaginal 3-Dimensional Ultrasonography, Power Doppler Angiography, and the Virtual Organ Computer-Aided Analysis Imaging Pr

Mercé

Gómez

Engels

et al. 2005

Journal of Ultrasound in Medicine

View full text Add to dashboard Cite

Objectives. The purpose of this study was to assess intraobserver and interobserver reproducibility of the parameters of ovarian response and oocyte ability, studied by 3-dimensional ultrasonography and power Doppler angiography (PDA), and the possible influence of the ovarian functional stage. Methods. Twenty-nine women were included in an in vitro fertilization program. Fourteen women were evaluated after pituitary suppression (basal group), and 15 were scanned on the human chorionic gonadotropin administration day, after gonadotropin ovarian stimulation (stimulated group). A first observer acquired 2 volumes for each ovary. Another observer performed a second analysis of the volumes acquired by the first observer. We analyzed ovarian volume, follicle number in the basal group, vascularization index, flow index, and vascularization-flow index. The volumes were processed by the Virtual Organ Computer-Aided Analysis imaging program using plane A and 15°rotational steps. Results. Ovarian volume showed excellent intraobserver and interobserver agreement, with an intraclass correlation coefficient (Intra-CC) and an interclass correlation coefficient (Inter-CC) close to the unit. The Intra-CC and Inter-CC about the number of follicles were 0.964 and 0.978, respectively. Vascularity indices showed an Intra-CC greater than 0.90. The vascularization index and the vascularization-flow index showed higher interobserver than intraobserver reproducibility (Inter-CC > 0.96 for both). The flow index Inter-CC was 0.898. The reproducibility differences between the basal and stimulated ovary measurements were not significant. Conclusions. There is an excellent intraobserver and interobserver reproducibility of the ovarian volume, follicle counts, and 3-dimensional PDA indices. The ovarian functional stage has no influence on the reliability. Three-dimensional ultrasonography and PDA improve the study of ovarian parameters, and their reliability impels a change in the current clinical routine of performing and interpreting ultrasonography.

show abstract

“…Each ovary 3D dataset was analyzed in terms of follicular count and follicles were divided according to size (diameter of 2-9 mm and diameter >9 mm). VOCAL TM (Virtual Organ Computer-aided Analysis), which is an extension of the 3D-VIEW TM software (Kretz Technik, Zipf, Austria), was used to measure the endometrial and ovarian volume in the manual mode using 15 • of rotation, described as a step rotation with good reproducibility (14). For these rotational measurements, two calipers were placed on the upper and lower aspects of the endometrial cavity or on the ovarian edges.…”

Section: Ultrasonographymentioning

confidence: 99%

Endometrial preparation for in vitro oocyte maturation: Early use of estrogen increases endometrial tissue and requires lower daily dosage: A cross over trial in ‘mock’ cycles

Martins

Reis

Ferriani

et al. 2006

J Assist Reprod Genet

View full text Add to dashboard Cite

Purpose: Determine if estrogen used since the beginning of the menstrual flow could improve endometrial tissue compared to standard endometrial preparation for in vitro maturation cycles.Methods: Twenty polycystic ovary syndrome women were submitted to two estrogen therapy schedules: standard schedule; estrogen began on the day of planned egg retrieval (dosage was based on endometrial thickness); and long schedule; estrogen began on the first day of menstruation. No oocyte retrieval or embryo transfer was performed. Three-dimensional ultrasound was performed on the day of planned egg retrieval and one week later for endometrial evaluation.Results: A higher endometrial thickness and volume was found in long schedule on both evaluations. The number of patients that have used 10 mg/day of estradiol was significant higher in the standard schedule (65% × 0%). No other significant difference was found.Conclusions: The early use of estrogen improves endometrial tissue and requires lower daily dosage.

show abstract

The reproducibility of endometrial volume acquisition and measurement with the VOCAL‐imaging program

Cited by 112 publications

References 27 publications

Estimation of uterine volume: A comparison between Viewpoint and 3D ultrasound estimation in women undergoing laparoscopic hysterectomy

Estimation of uterine volume: A comparison between Viewpoint and 3D ultrasound estimation in women undergoing laparoscopic hysterectomy

Intraobserver and Interobserver Reproducibility of Ovarian Volume, Antral Follicle Count, and Vascularity Indices Obtained With Transvaginal 3-Dimensional Ultrasonography, Power Doppler Angiography, and the Virtual Organ Computer-Aided Analysis Imaging Pr

Endometrial preparation for in vitro oocyte maturation: Early use of estrogen increases endometrial tissue and requires lower daily dosage: A cross over trial in ‘mock’ cycles

Contact Info

Product

Resources

About