Abstract
Objective: To determine whether 3D ultrasound can provide a rapid and efficient way to do a transvaginal GYN scan compared to the traditional 2D ultrasound. Methods: 35 consecutive patients presenting for GYN sonography formed the study cohort. After doing standard 2D transvaginal scan including measurements of the endometrium and abnormalities, 3–4 volume acquisitions were obtained, encompassing the uterus (1–2 volumes) and the ovaries. These volumes were reviewed off line without any patient information. The endometrium and other measurements were performed on the volumes. The 2D and 3D results were compared. Results: The mean time needed for the standard 2-D scan was 2.61 minutes compared with 1.07 minutes for the 3-D volume acquisitions. The mean time for the reconstruction, measurement and interpretation of the volumes off-line was 1.19 minutes. The mean time for the entire 3D exam (both parts) was 2.26 minutes (p = 0.047 comparing 2D to total 3D). The mean measurement of the endometrium was 6.69 mm and 6.64 mm using 2D and 3D respectively (p = 0.8). The mean measurements of the 27 ovarian cysts were 2.24 cm and 2.21 cm using 2D and 3D respectively (p = 0.7). The mean measurements of 9 fibroids were 4.3 cm and 3.98 cm using 2D and 3D respectively (p = 0.08). Discrepancies between the interpretation of the 2D and 3D exams: one ovary was seen better on 3D, one ovary was seen better on 2D. One endometrium was only measurable on 3D and one polyp seen only on 2D. Patients with dermoids, endometriomas, cysts, fibroids etc. were detected equally well using both methods. Conclusion: This study shows that a complete transvaginal GYN exam can be done in 1.07 minutes of scan time and interpreted off line in an additional 1.19 minutes. The 35 cases were scanned and interpreted using 3D in 79.14 minutes total compared to 91.46 minutes of 2D scan time. The accuracy of the scan was similar using both techniques. Adoption of this approach brings ultrasound into the era of volume imaging.
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