Signa pioneer mr

Whole-brain MRIs were collected on a GE 3.0 Tesla scanner (SIGNA Pioneer MR, GE Healthcare, America). A 3-dimensional localizer scan was performed for the placement of the scanning area. Then a coronal T2-weighted sequence was collected to rule out any cranial lesion, followed by a sagittal three-dimensional T1-weighted fast -spoiled gradient echo-based sequence (T1w FSPGR) (TR = 8.5 ms, TE = 3.3 ms, flip angle = 12°, thickness = 1 mm/no gap, pixel size = 1.0 mm × 1.0 mm, NEX = 1.00, scanning time = 5.5 min). For SyMRI, a two-dimensional multiple-dynamic multiple-echo (MDME) pulse sequence, comprising four automatically calculated saturation delay times and two echo times, was applied to acquire the axial sections. The parameters are as follows: TR = 10205.0 ms, TE = 11.3 ms, flip angle = 20°, thickness = 2 mm/no gap, pixel size = 2.0 mm × 2.0 mm, NEX = 1.00, ETL = 16, scanning time = 5.5 min.

The patients underwent contrast-enhanced scrotal MRI using a 3.0 Tesla (SIGNA Pioneer MR; GE Healthcare, USA) or 1.5 Tesla (Gyroscan and Intera, Philips Healthcare) scan system. The same technique and protocol were used for all patients (Table 1).
DWI was performed on the axial plane with a repetition time (TR) of 4000 ms, echo time (TE) of 60 ms, Flip angle of 90^o, slice thickness of 8 mm, field of view (FOV) of 340, matrix of 128×128, and two b values (0 and 1000) 11 (link)
The ADC map assesses the diffusion capacity of intracellular water molecules according to the formula S(b)/S(50) = exp[-(b - 50) ×ADC], where S(b) is the signal intensity at a b-value of 1000 s/mm², and S(50) is the signal intensity at a b-value of 50 s/mm².