Comparative evaluation of multidetector CT and MR imaging in the differentiation of adnexal masses

Abstract

The purpose was to compare the accuracy of multidetector CT (MDCT) on a 16-row CT scanner and magnetic resonance (MR) imaging in the characterization of ovarian masses. Preoperative CT examination of the abdomen and MR imaging of the pelvis was performed in 67 women, with clinically or sonographically detected adnexal masses. The CT examinations were performed on a 16-row CT scanner, and the protocol included scanning of the abdomen during the portal phase, using a detector collimation of 16 x 0.75 mm and a pitch of 1.2. We used a 1.5-T magnet unit to perform T1, T2 and fat-suppressed T1-weighted sequences, before and after intravenous administration of gadolinium chelate compounds. The accuracy of multidetector CT and MR imaging in the differentiation between benign and malignant ovarian masses was evaluated, using histopathologic results as the standard of reference. The sensitivity, specificity and accuracy of MDCT in the characterization of ovarian masses were 90.5%, 93.7% and 92.9%, respectively, and that of MR imaging 95.2%, 98.4% and 97.6%, respectively. Although MRI performed slightly better, this did not reach statistical significance. In conclusion, both MDCT on a 16-row CT scanner and MR imaging demonstrated satisfactory results in the characterization of ovarian masses.

Current Possibilities of Magnetic – Resonance Imaging in Detection of Ovarian Cancer

“…В работе L. Manganaro et al было показано, что МРТ более эффективна, чем компьютерная томография (КТ), при оценке пространственных отношений образова-ний малого таза и дифференциальной диагностике твер-дых и жидкостных компонентов [24]. По данным A. Tsili et al, использование МРТ в диагностике опухолей яичника несколько более эффективно, чем КТ, однако при этом статистически значимых различий получено не было [25].…”

Clinical management of incidental findings on pelvic adnexal masses

“…Magnetic resonance imaging (MRI) may be appropriate for analysis of adnexal cysts to help clarify the potential for malignancy with a sensitivity and specificity of 91.9 and 88.4%, respectively 20,21 (B). In cases where there is suspicion of extra-ovarian involvement, computed tomography (CT) is the most useful technique with a sensitivity of 87.2% and specificity of 84.0% 4,22,23 …”

Comparative evaluation of multidetector CT and MR imaging in the differentiation of adnexal masses: authors’ reply

“…This could probably enable the correct characterization of one of the falsenegative cases with multidetector CT (MDCT) in our study, by detecting the enhancing element within a borderline ovarian tumour with haemorrhagic content [1]. This study was one of the first conducted on our 16-row MDCT system, and unenhanced CT was not performed due to concern about irradiation.…”

“…Regarding the area of coverage with MR imaging this included the pelvis 'covering the area from the iliac crests to the symphysis pubis, or the ovarian mass, if larger', as already mentioned in our paper in the 'Material and methods' section [1].…”