Ge signa hdxt 3.0t mri scanner

MRI examination was performed using a unit system (GE Signa HDXT 3.0T MRI scanner, GE Healthcare, USA) equipped with an 8-channel phased-array abdominal coil. Excluding contraindications, all patients received an intramuscular injection of 15 mg hyoscine butylbromide at 30 minutes before the MRI scan to prevent gastrointestinal motility. The bladder was kept approximately half-filled, in order to improve lesion visibility without changing the anatomy. Patients were placed in the supine position and were breathing freely during the acquisition.
The routine pelvic MRI protocol consisted of the following sequences: axial T1-weighted imaging (T1WI), axial/sagittal T2-weighted imaging (T2WI), axial FS T2WI, DWI (b value = 0, 1,000 s/mm²), and multiple phases of contrast-enhanced (LAVA-FLEX) MRI. When scanning the axial images, the transverse plane was perpendicular to the long axis of the uterine body and for the sagittal images, the longitudinal plane was parallel to the main body of the uterus. T1WI+C sequence was acquired at the arterial, venous, and delayed phases of contrast medium enhancement in axial planes, which were acquired at 25, 60, and 120 s after the intravenous injection of 0.1 mmol/kg gadodiamide (Omniscan, GE Healthcare) using an Ulrich power injector. The scanning sequences and parameters are shown in Table S1.

All patients underwent conventional pelvic MRI and axial pelvic IVIM-DWI before the operation. Pelvic MRI was performed using a unit system (GE Signa HDXT 3.0T MRI scanner, GE Healthcare, USA) equipped with an 8-channel phased-array body coil. All patients received an intramuscular injection of 15 mg hyoscine butylbromide at 30 minutes before the MRI scan to prevent gastrointestinal motility. The bladder was kept approximately half-filled, in order to improve lesion visibility without changing the anatomy. Patients were placed in the supine position and were breathing freely during the acquisition.
The scanning range was from the aortic bifurcation to the inferior margin of the pubic symphysis. The scanning parameters were as follows: axial fast spin-echo (FSE) T1-weighted images (T1WI) (repetition time (TR)/echo time (TE): 550/13 msec, NEX: 2, slice thickness/gap: 4 mm/1 mm) and oblique axial and sagittal fat suppression (FS) FSE T2-weighted images (T2WI) (TR/TE: 4,600/30 msec, NEX: 2, slice thickness/gap: 6 mm/2 mm). Axial IVIM-DWI with FS was obtained in the short-time inversion recovery (STIR) sequence using single-shot echo-planar imaging (EPI) pulse sequence with 10 b values (0, 10, 20, 50, 100, 200, 400, 800, 1,200, and 1,500 s/mm²), TR/TE: 4,000/65 msec, NEX: 6).