Clinical Study
Differences of Various Region-of-Interest Methods for Measuring Dopamine Transporter Availability Using -TRODAT-1 SPECT
Table 4
Striatal DAT availabilities, declines per decade of DAT availabilities, and striatum sizes in the regions: (1) inside both the threshold ROIs and the atlas-defined ROIs, (2) inside the threshold ROIs but outside the atlas-defined ROIs, and (3) outside the threshold ROIs but inside the atlas-defined ROIs.
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In each pair of data, the left is for MRI-normalization, while the right is for SPECT-normalization. Size: each voxel is of 2.897 mm × 2.897 mm × 2.897 mm. Decline per decade. For comparisons, the same OC averages from the threshold-ROI methods were used in the calculation of (ST-OC)/OC. |