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- Title
Use of enhanced T2 star-weighted angiography (ESWAN) and R2* values to distinguish ovarian cysts due to endometriosis from other causes.
- Authors
Li, Ye; Song, Qing-Wei; Sun, Mei-Yu; Wang, He-Qing; Wang, Sheng; Wei, Qiang; Liu, Jing-Hong; Tian, Shi-Feng; Tong, Zi-Bin; Liu, Ai-Lian
- Abstract
Purpose: To evaluate the feasibility of enhanced T2 star-weighted angiography (ESWAN) in differentiating endometrial from non-endometrial cysts. Methods: Forty-nine patients with 60 histopathologically proven ovarian cystic lesions underwent pelvic MRI including T1-weighted imaging (T1WI), T2-weighted imaging (T2WI), liver acquisition with volume acceleration, and ESWAN. Ovarian cystic lesions were divided into endometrial cysts (group 1; n = 28), pyosalpinx and hydrosalpinx (group 2; n = 13), and ovarian cystic and cystic-solid tumors (group 3; n = 19). R2* (effective transverse relaxation rate) values were measured and pairwise comparison of the R2* values among the three groups was made using Kruskal-Wallis test. Receiver operating characteristic curves were used to calculate cutoff values and performance of R2* values for distinguishing among groups. T1WI signal intensity and R2* value were also compared using area under curve values. Results: R2* values for group 1 were statistically higher than groups 2 and 3 (15.37, 1.40, and 1.79 Hz, respectively; P < 0.001). The cutoff value for R2* was 7.43 Hz with a sensitivity, specificity, PPV, NPV, and accuracy of 96.43, 87.50, 87.10, 96.55, and 91.67%, respectively. There was no significant difference between the R2* value and T1WI in diagnosing endometrial cysts. Conclusions: The R2* value provides an effective way to discriminate endometrial cysts from other ovarian cystic lesions.
- Subjects
OVARIAN cysts; ENDOMETRIOSIS; ANGIOGRAPHY; HISTOPATHOLOGY; MAGNETIC resonance imaging; KRUSKAL-Wallis Test; DIAGNOSIS
- Publication
Abdominal Imaging, 2015, Vol 40, Issue 6, p1733
- ISSN
0942-8925
- Publication type
Article
- DOI
10.1007/s00261-014-0314-7