MR images of 36-year-old man with subtotal resection of right frontal grade
III anaplastic astrocytoma, before and after radiation therapy.
Upper row: T1-weighted/FLAIR/T2-weighted RGB composites.
Lower row: RGB composites with contrast enhancement.
Left: December 2000
Right: January 2001 (after radiation therapy)
Comparison of the Talairach-referenced composites demonstrates
interval improvement as evidenced by reduction in aberrant
hyperintense T2 and FLAIR signal (blue-green) and mass
effect. A reduction in periventricular rimming
(blue-green) is also seen, which may reflect reduction in transependymal
cerebrospinal fluid migration. Note that performing studies with
similar Talairach angulation, imaging parameters, and RGB
encoding facilitates intrasubject comparison over time.
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