ORCID: https://orcid.org/0000-0002-0654-387X
(2019):
Within-lesion heterogeneity of subcortical DWI lesion evolution, and stroke outcome: A voxel-based analysis.
In: Journal of Cerebral Blood Flow and Metabolism, Vol. 40, No. 7: pp. 1482-1491
[PDF, 539kB]

Abstract
The fate of subcortical diffusion-weighted imaging (DWI) lesions in stroke patients is highly variable, ranging from complete tissue loss to no visible lesion on follow-up. Little is known about within-lesion heterogeneity and its relevance for stroke outcome. Patients with subcortical stroke and recruited through the prospective DEDEMAS study (NCT01334749) were examined at baseline (n = 45), six months (n = 45), and three years (n = 28) post-stroke. We performed high-resolution structural MRI including DWI. Tissue fate was determined voxel-wise using fully automated tissue segmentation. Within-lesion heterogeneity at baseline was assessed by free water diffusion imaging measures. The majority of DWI lesions (66%) showed cavitation on six months follow-up but the proportion of tissue turning into a cavity was small (9 +/- 13.5% of the DWI lesion). On average, 69 +/- 25% of the initial lesion resolved without any visually apparent signal abnormality. The extent of cavitation at six months post-stroke was independently associated with clinical outcome, i.e. modified Rankin scale score at six months (OR = 4.71, p = 0.005). DWI lesion size and the free water-corrected tissue mean diffusivity at baseline independently predicted cavitation. In conclusion, the proportion of cavitating tissue is typically small, but relevant for clinical outcome. Within-lesion heterogeneity at baseline on advanced diffusion imaging is predictive of tissue fate.
Item Type: | Journal article |
---|---|
Faculties: | Medicine Medicine > Munich Cluster for Systems Neurology (SyNergy) Medicine > Institute for Stroke and Dementia Research (ISD) |
Subjects: | 600 Technology > 610 Medicine and health |
URN: | urn:nbn:de:bvb:19-epub-79553-9 |
ISSN: | 0271-678X |
Language: | English |
Item ID: | 79553 |
Date Deposited: | 15. Dec 2021, 14:49 |
Last Modified: | 10. Jun 2024, 11:50 |
DFG: | Gefördert durch die Deutsche Forschungsgemeinschaft (DFG) - 390857198 |