Article Figures & Data
Figures
- Fig 1.
The size of ROIs manually drawn at each intervertebral disc level. The error bars represent the SDs.
- Fig 2.
Averaged DTI parameters of ZOOM and non-ZOOM (full-FOV [fFOV] single-shot-EPI [ss-EPI]) sequences for the direct age-matched group as a function of intervertebral disc levels across all subjects. The error bars represent the SDs.
- Fig 3.
Averaged DTI indices of ZOOM EPI and non-ZOOM (full-FOV [fFOV] single-shot-EPI) sequences for the indirect age-matched group as a function of intervertebral disc levels across all subjects. The error bars represent the SDs.
- Fig 4.
Illustration of DTI indices at different spinal cord levels localized by a T2-weighted image in ZOOM. Midsagittal T2-weighted image shows the location of the 7 axial diffusion tensor images that cover the entire length of the cervical spinal cord. Color and gray-scale FA maps are in the first and second columns. MD, AD, and RD maps at each location are also shown. Note that spatial resolution is improved and distortion is lower compared with the non-ZOOM acquisition (Fig 5). ssEPI indicates single-shot EPI.
- Fig 5.
Illustration of DTI indices at different spinal cord levels localized by a T2-weighted image in non-ZOOM. Midsagittal T2-weighted image shows the location of the 7 axial diffusion tensor images that cover the entire length of the cervical spinal cord. Color and gray-scale FA maps are in the first and second columns. MD, AD, and RD maps at each location are also shown.
Tables
- Table 1:
Comparison of non-ZOOM and ZOOM of averaged FA, MD, AD, and RD values along the cervical spinal cord levels and across direct age-matched subjectsa
Non-ZOOM ZOOM Prob<|t| FA 0.65 ± 0.042 0.74 ± 0.038 P = .04 MD 0.72 ± 0.038 0.50 ± 0.032 P = 005 AD 1.36 ± 0.086 0.99 ± 0.021 P = .002 RD 0.42 ± 0.041 0.24 ± 0.037 P < .001 Note:—Prob<|t| indicates the P value for 2-tailed test.
↵a Data are means and SDs.
- Table 2:
Comparison of non-ZOOM and ZOOM of averaged FA, MD, AD, and RD values along the cervical spinal cord levels and across indirect age-matched subjectsa
Non-ZOOM ZOOM Prob<|t| FA 0.65 ± 0.067 0.76 ± 0.04 P = .03 MD 0.7 ± 0.038 0.49 ± 0.047 P = .002 AD 1.3 ± 0.06 1.02 ± 0.05 P < .001 RD 0.4 ± 0.06 0.23 ± 0.05 P = .002 ↵a Data are means and SDs.
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