Article Figures & Data
Figures
- FIG 1.
Proportion of lesion detection by sequence (A) and by sequence per vertebral level (B) for the patients having the 4 imaging sets (14 patients). The number of lesions (n) is detected for each cervical level.
- FIG 2.
Axial presentation at the C4 level for patient P11. Images were acquired with the T2*-WI GRE (A), 3T UNI MP2RAGE (B), 7T isotropic UNI MP2RAGE (C), and 7T anisotropic UNI MP2RAGE (D) sequences. The posterior lesion was visible on each image, the right lateral lesion was not visible on the 3T UNI MP2RAGE sequence (B), and the left lateral lesion (white arrowhead) was only detected with the 7T anisotropic UNI MP2RAGE sequence (D).
- FIG 3.
A patient P13 presenting with a C4 left lateral lesion (arrowhead). The lesion was not detected on axial T2*-WI GRE image (A), the 3T UNI MP2RAGE (B), nor the 7T isotropic UNI MP2RAGE (C). It was only detected using the 7T anisotropic UNI MP2RAGE (D).
- FIG 4.
Patient P17 presented with a small lesion (arrowhead) in contact with the anterior fissure of the spinal cord at the C1–C2 level. The lesion was seen on a T2*-WI GRE (A) image, not seen on 3T UNI MP2RAGE (B), and easily seen on 7T anisotropic UNI MP2RAGE (C) image.
- FIG 5.
Patient P3 presented with a small posterior lesion (white arrowhead) at the C1 level that was not seen on axial T2*-WI GRE (A) image nor with 3T UNI MP2RAGE (B). At 7T, the lesion was seen on the axial plane of the isotropic UNI MP2RAGE sequence (C), but it was not seen on the anisotropic 7T UNI MP2RAGE image (D). The sagittal plane (E) of the 7T isotropic UNI MP2RAGE sequence shows that this lesion (white arrowhead) has a small height. This lesion is not seen on the sagittal 3T UNI MP2RAGE (F). Additional lesions (white arrows) can be seen at the C3 and C5 levels on both sagittal planes (E and F).
Tables
Magnetic Field 3T 7T Sequence T2*-WI T2WI STIR-WI MP2RAGE MP2RAGE Isotropic MP2RAGE Anisotropic Dimension/orientation 2D 2D 2D 3D 3D 3D Axial Sagittal Sagittal Sagittal Coronal Axial TR (sec) 0.5 4 3.2 4 5 5 TE (ms) 27 113 53 2.48 2.15 3.05 FOV (mm) 180 280 320 300 260 256 Resolution (mm3) 0.5 × 0.5 × 5 1.1 × 0.9 × 2 0.9 × 0.7 × 3 0.9 × 0.9 × 0.9 0.7 × 0.7 × 0.7 0.3 × 0.3 × 4 Slices 9 Per slab, 176 192 64 Slices per slab, 2 Slabsa 1 or 2 Slabsa,b Acq. time (min) 5.26 1.54 2.18 7.18 8.47 6.02/Slab Patients Age (yr) Sex Disease Course Disease Duration (mo) EDSS Lesion Count P1 40 M RR 95 2 7 P2a 20 F RR 58 2.5 3 P3 30 F RR 87 1.5 6 P4 27 F RR 17 3 6 P5 23 F RR 47 0 5 P6 31 F RR 6 0 0 P7 35 F RR 33 1 3 P8 28 F RR 6 0 3 P9 38 F RR 7 1 0 P10 33 M RR 17 0 3 P11 31 F RR 189 0 12 P12 41 F RR 45 1 7 P13 26 M RR 12 0 3 P14 20 M RR 44 0 0 P15 30 F RR 10 1 0 P16a 35 M RR 11 2 12 P17a 26 F RR 10 1 8 Note:—RR indicates relapsing-remitting; F, female; M, male; EDSS, Expanded Disability Status Scale.
↵a The patients who could not have the examination with the 7T isotropic MP2RAGE sequence.
