Serial MRI in Epidemiology: Seasonal Occurrence of New MS Lesions
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چکیده
lesions and active scans. Significantly higher rates of disease activity in spring/summer compared to autumn/winter are apparent. "active scan" rates reflect relative counts of exams with one or more new lesions Fig.1: Example shows maximum intensity projection of all activity over 3 months with Gd-DTPA (left) and PD-weighted change (center & right) with monthly intervals. Several activity loci missed by the contrast scan are captured by the PD change.
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تاریخ انتشار 2008