Letter by Stanley et al Regarding Article, “Primary Angiitis of the Central Nervous System Magnetic Resonance Imaging Spectrum of Parenchymal, Meningeal, and Vascular Lesions at Baseline”
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To the Editor:
We read with great interest the article entitled Primary Angiitis of the Central Nervous System. Magnetic Resonance Imaging Spectrum of Parenchymal, Meningeal, and Vascular Lesions at baseline, by Boulouis et al.1
The authors defined acute and subacute ischemic lesions as those that were 0 to 7 days old and 1 to 3 weeks old, respectively. These lesions were characterized as those that were hyperintense on diffusion-weighted imaging (DWI) and had correlating hypointense signal on the apparent diffusion coefficient (ADC) maps. Authors defined chronic lesions …