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Original Research

Sodium MR Imaging of the Lumbar Intervertebral Disk at 7 T: Correlation with T2 Mapping and Modified Pfirrmann Score at 3 T—Preliminary Results

Published Online:Nov 1 2012https://doi.org/10.1148/radiol.12111920
Figure 1a:

Figure 1a: ROI placement. Region 3, as shown in the (a) schematic drawing, was considered to represent the NP and was used for (b) T2 mapping and (c) sodium imaging.

Figure 1b:

Figure 1b: ROI placement. Region 3, as shown in the (a) schematic drawing, was considered to represent the NP and was used for (b) T2 mapping and (c) sodium imaging.

Figure 1c:

Figure 1c: ROI placement. Region 3, as shown in the (a) schematic drawing, was considered to represent the NP and was used for (b) T2 mapping and (c) sodium imaging.

Figure 2:

Figure 2: Modified Pfirrmann score, with consideration of changes proposed by Griffith et al (22). CSF = cerebrospinal fluid, T2 = T2-weighted images.

Figure 3a:

Figure 3a: (a) Color-coded image of T2 map with ROI placement, (b) sodium image, and (c) T2-weighted sagittal image for the semiquantitative modified Pfirrmann scoring.

Figure 3b:

Figure 3b: (a) Color-coded image of T2 map with ROI placement, (b) sodium image, and (c) T2-weighted sagittal image for the semiquantitative modified Pfirrmann scoring.

Figure 3c:

Figure 3c: (a) Color-coded image of T2 map with ROI placement, (b) sodium image, and (c) T2-weighted sagittal image for the semiquantitative modified Pfirrmann scoring.

Figure 4:

Figure 4: Bar graph shows mean normalized sodium signal intensity values and T2 values for the different modified Pfirrmann scores.

Figure 5a:

Figure 5a: Correlation between (a) T2 values and modified Pfirrmann scores, (b) normalized sodium signal intensity values and the modified Pfirrmann scores, and (c) T2 values and normalized sodium signal intensity values.

Figure 5b:

Figure 5b: Correlation between (a) T2 values and modified Pfirrmann scores, (b) normalized sodium signal intensity values and the modified Pfirrmann scores, and (c) T2 values and normalized sodium signal intensity values.

Figure 5c:

Figure 5c: Correlation between (a) T2 values and modified Pfirrmann scores, (b) normalized sodium signal intensity values and the modified Pfirrmann scores, and (c) T2 values and normalized sodium signal intensity values.