150 Chapter 7 Table 7.1 MRI scan protocols on the 3T and 7T MRI scanner. Purpose Contrast parameters Resolution (acquisition) Resolution (reconstruction) Field of View Acquisition time (min) Additional information 3T MRI 3D T1 Anatomical information TR/TE = 9.9/4.6 ms 1 mm isotropic 1 mm isotropic 256 mm 4:20 Flip angle = 8° 3D FLAIR WMH, lacunes TR/TI = 4800/1650 ms TE = 346 ms 0.98 x 0.98 x 1.00 mm3 0.92 x 0.92 x 0.5 mm3 220 mm 4:48 Refocusing angle = 40° T2 Perivascular spaces TR = 4490 ms; TE = 80 ms 0.40 x 0.50 x 3.00 mm3 0.22 x 0.22 x 3.00 mm3 230 mm 2:15 Flip angle = 90° SWI Iron, microbleeds, superficial siderosis TR = 31 ms; TE = 7.20 ms 0.60 x 0.60 x 2.00 mm3 0.23 x 0.23 x 1.00 mm3 220 mm 2:35 Flip angle = 17° DWI Acute or recent ischemic lesions TR = 3206 ms; TE = 67 ms; 1.96 x 2.44 x 5.00 mm3 0.86 x 0.86 x 5.00 mm3 220 mm 0:38 b-value = 1000 CSF_BOLD CSF-BOLD coupling TR = 370 ms; TE = 25 ms 2.88 x 2.88 x 5.00 mm3 2.40 x 2.40 x 5.00 mm3 230 mm 5:07 Flip angle = 40° Q-flow Large vessel flow TR/TE = 15/7.2 ms; 0.45 x 0.45 x 4.00 mm3 0.45 x 0.45 x 4.00 mm3 230 mm 1.02 Venc =80 cm/s MRfingerprinting White matter structural integrity; Myelin-water imaging TR/TE = 15/3.0 ms 1.00 x 1.00 x 4.00 mm3 1.00 x 1.00 x 4.00 mm3 240 mm 5:00 Flip angle range: 10.0° - 60.0° Inhomogeneous magnetic transfer White matter structural integrity TR/TE = 90/1.31 ms 2.29 x 2.29 x 5.00 mm3 1.72 x 1.72 x 5.00 mm3 220 mm 7:17 Flip angle = 7° Flow territory mapping Perfusion scan TR/TE = 4550/16 ms 2.50 x 2.56 x 5.00 mm3 1.88 x 1.88 x 5.00 mm3 240 mm 4:56
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