Article Figures & Data
Figures
- Fig 1.
Schema for calculating regional structural volume and SPECT counts. An example of calculating striatal and occipital volume and SPECT counts is shown. A, The original MR imaging and SPECT images are coregistered. B−D, We transformed the striatal and occipital VOI templates to the individual brain (B); and by using these VOI templates on the individual MR image (C), we extracted individual regional segmented VOI templates (D) and calculated their volumes. E, Then, by using the extracted striatum and occipital lobe as VOIs for the individual coregistered SPECT image, we determined striatal and occipital lobe counts.
- Fig 2.
Distribution of SPECT occipital ratio and the striatal volume ratio of patients with DLB and AD. The square indicates AD; the triangle, DLB.
- Fig 3.
ROC curves to discriminate between DLB and AD. The measurement of the z-score in the combined striatal volume and occipital SPECT ratio yielded higher sensitivity and specificity (AUC = 0.898) (a) compared with the independent striatal volume ratio (AUC = 0.679) (b) or the independent occipital SPECT ratio (AUC = 0.798) (c).
Tables
Mean volume ratio and SPECT counts ratio of the DLB and AD groups
MR Imaging SPECT Hippocampal Striatal Occipital Hippocampal Occipital DLB 0.00285 ± 0.0004 0.00596 ± 0.00145a 0.0616 ± 0.00624 3.54 ± 0.244 1.90 ± 0.214a AD 0.00294 ± 0.0006 0.00710 ± 0.00173 0.0627 ± 0.00437 3.51 ± 0.213 2.15 ± 0.180 -
a Significantly lower (P < .05)
-
In this issue
Jump to section
Related Articles
Cited By...
- No citing articles found.