Setting and Participants
This study was approved by the institutional review board of 〈Blinded for review〉. A total of 34 patients with PTA who underwent an MRI examination for the preoperative diagnosis of PTA at 〈Blinded for review〉 during the period from January 2012 to March 2020 were examined. SS-EPI at 1.5T was performed in eight patients during the period Jan. 2012 to Nov. 2017, and RS-EPI at 3.0T was performed in 26 patients during the period July 2014 to March 2020. All patients underwent a parathyroidectomy, and the resected specimens were histologically evaluated. Of the 34 patients, 10 patients were excluded from this study for the following reasons: the lesion was not detectable on MRI (n=3), DWI data were obtained using a different protocol (n=5), and the presence of severe motion or susceptibility artifacts (n=2). The remaining 24 patients were enrolled. Their clinical information including the results of imaging examinations was retrospectively reviewed.