Magnetic resonance imaging
MRI scans were conducted with a 1.5 T MR scanner (Optima MR360; General Electric Company, USA). The patients underwent routine screening of pelvic sagittal and coronal planes and fat-suppressed sagittal and coronal planes. All images were evaluated by an experienced radiologist. Several baseline characteristics were assessed on T2-weighted images, including the position of the uterus (anteverted or retroverted); diameter of the CSD (the length, width, and depth); the TRM; and the presence of adenomyosis, endometriosis, or uterine fibroids.
The main features of adenomyosis were an increased thickness of the junctional zone of the uterus (exceeding 12 mm), and the presence of intramyometrial cyst(s) or a heterogeneous myometrium, which were associated with heterogeneously hyperintense regions on T2-weighted, and sometimes T1-weighted, images (Fig. S3).