○ Implanted ferromagnetic metal eg. Intraocular metal
○ Pacemaker/Implantable defibrillator
○ Extreme claustrophobia
Imaging study procedures
MRI safety screening
Readout segmented diffusion technique (RESOLVE)
Axial orthogonal plane with b-values 50 and 800 s/mm 2, and 1 & 3 signal averages respectively.
ADC maps and calculated b = 1400 mm/s 2 images produced as part of protocol.
In-plane resolution of 1.1 × 1.1 mm and 4 mm slice thickness.
Pre-contrast T1-weighted VIBE scans with TR 4.09 ms, TE 1.35 ms, and flip angles 2° and 15° to calculate native T1.
DCE acquired with time-resolved angiography with stochastic trajectories (TWIST) technique acquired over 60 phases, with a temporal resolution of 5.28 s, bandwidth 440 Hz/Px, TR 3.67 ms and TE 1.48 ms. Gadoversetamide (Optimark) 0.1 mM/kg injected after 3 phases acquired.