Arjen Lindenholz

54 CHAPTER 3 Table 2. 7T vessel wall MRI protocol used at our institution Scan parameter 3D T 1 MPIR-TSE DWI 3D T 1 MPIR-TSE +C Inflow-SWI 3TE +C 3D T 2 FLAIR +C FOV (mm 3 ) 250 × 250 × 190 220 x 220 x 123 250 × 250 × 190 190 x 190 x 102 250 x 250 x 190 Acquisition orientation Sagittal Transverse Sagittal Transverse Sagittal Acquisition spatial resolution (mm 3 ) 0.8 × 0.8 × 0.8 1.5 x 1.5 x 1.5 0.8 × 0.8 × 0.8 0.4 x 0.5 x 0.6 0.8 x 0.8 x 0.4 Reconstructed spatial resolution (mm 3 ) 0.49 × 0.49 × 0.49 1.5 x 1.5 x 1.5 0.49 × 0.49 × 0.49 0.4 x 0.4 x 0.3 0.49 x 0.49 x 0.49 TR / TE / TI (ms) 3952 / 37 / 1375 17659 / 57 / - 3952 / 37 / 1375 21 / 2.3 / - 8000 / 300 / 2200 Flip-angle (degrees) 120 120 120 30 90 Echo spacing (ms) 3.3 - 3.3 - 4.7 TSE factor 169 (incl. 10 start-up) - 169 (incl. 10 start-up) - 125 (incl. 1 start-up) Oversampling factor 1 - 1 - 1 Readout bandwidth (Hz) 934.8 23.6 934.8 557.0 410.9 No. of signals acquired (NSA) 2 1 2 1 1 SENSE factor 2 (AP) & 3 (RL) 2.5 (AP) 2 (AP) & 3 (RL) 2.5 (RL) 2.5 (AP) & 3 (RL) Acquisition time (min:s) 10:40 6:10 10:40 9:18 10:48 Head coil 32-channel head coil 32-channel head coil 32-channel head coil 32-channel head coil 32-channel head coil AP, anteroposterior direction; +C, with contrast agent; FOV, field of view; MPIR-TSE, Magnetization Prepared Inversion Recovery Turbo Spin-Echo 48 ; NSA, number of signal averages; RL, right-left direction; SENSE, SENSitivity Encoding; TE, echo time; TI, inversion time; TR, repetition time; TSE, turbo spin echo.