OBJECTIVE: To evaluate the accuracy of a three-dimensional (3D) ultrasound system in volume estimation of cervical carcinoma. STUDY DESIGN: Transvaginal 3D and two-dimensional (2D) scans on cervical carcinoma volumes were performed 1 day before surgery. The volume of cervical carcinoma measured from each surgical specimen was compared with the corresponding volume of the cervical tumor measured by a 3D ultrasound and with the conventional 2D ultrasound volume measurement calculated using the formula pi/6 x(R1 x R2 x R3), where R1, R2, and R3 were the maximal transverse, anteroposterior, and longitudinal length of tumor, respectively. Limits of agreement and 95% confidence intervals were calculated and systemic bias between the methods was analyzed. The Klotz test was also used to assess the statistical significance of the degree of dispersion. RESULTS: A total of 61 cases, 55 with exophytic tumors and 6 with endocervical tumors, were examined in this study. The limits of agreement between the volume measured from specimen and tumor volume determined by ultrasound were +6.68 to -6.10 mL for 3D measurements and +12.46 to -10.98 mL for 2D measurements. The Klotz test showed the discrepancy in the degree of dispersion between 3D and 2D ultrasound measurements was statistically significant (P = 0.01). CONCLUSION: The true volume of cervical carcinoma is measured more accurately by a 3D ultrasound system than 2D ultrasound.
OBJECTIVE: To evaluate the accuracy of a three-dimensional (3D) ultrasound system in volume estimation of cervical carcinoma. STUDY DESIGN: Transvaginal 3D and two-dimensional (2D) scans on cervical carcinoma volumes were performed 1 day before surgery. The volume of cervical carcinoma measured from each surgical specimen was compared with the corresponding volume of the cervical tumor measured by a 3D ultrasound and with the conventional 2D ultrasound volume measurement calculated using the formula pi/6 x(R1 x R2 x R3), where R1, R2, and R3 were the maximal transverse, anteroposterior, and longitudinal length of tumor, respectively. Limits of agreement and 95% confidence intervals were calculated and systemic bias between the methods was analyzed. The Klotz test was also used to assess the statistical significance of the degree of dispersion. RESULTS: A total of 61 cases, 55 with exophytic tumors and 6 with endocervical tumors, were examined in this study. The limits of agreement between the volume measured from specimen and tumor volume determined by ultrasound were +6.68 to -6.10 mL for 3D measurements and +12.46 to -10.98 mL for 2D measurements. The Klotz test showed the discrepancy in the degree of dispersion between 3D and 2D ultrasound measurements was statistically significant (P = 0.01). CONCLUSION: The true volume of cervical carcinoma is measured more accurately by a 3D ultrasound system than 2D ultrasound.
Authors: Ozhan M Turan; Sifa Turan; Irina A Buhimschi; Edmund F Funai; Katherine H Campbell; Ozan M Bahtiyar; Chris R Harman; Joshua A Copel; Ahmet A Baschat; Catalin S Buhimschi Journal: Am J Perinatol Date: 2012-05-29 Impact factor: 1.862
Authors: J P Kusanovic; J K Nien; L F Gonçalves; J Espinoza; W Lee; M Balasubramaniam; E Soto; O Erez; R Romero Journal: Ultrasound Obstet Gynecol Date: 2008-02 Impact factor: 7.299