Research output: Contribution to journal › Article › peer-review
T1w/T2w ratio is associated with the brush sign and perfusion delay in watershed regions in patients with moyamoya angiopathy. / Filimonova, E; Ovsiannikov, K; Zaitsev, B et al.
In: Clinical Neurology and Neurosurgery, Vol. 231, 107821, 08.2023.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - T1w/T2w ratio is associated with the brush sign and perfusion delay in watershed regions in patients with moyamoya angiopathy
AU - Filimonova, E
AU - Ovsiannikov, K
AU - Zaitsev, B
AU - Rzaev, J
N1 - Copyright © 2023 Elsevier B.V. All rights reserved.
PY - 2023/8
Y1 - 2023/8
N2 - BACKGROUND: It has been shown recently using the T1w/T2w mapping technique that white matter microstructural integrity impairments exist in watershed regions patients with moyamoya angiopathy (MMA). We hypothesized that these changes could be associated with the prominence of other neuroimaging markers of chronic brain ischemia, such as perfusion delay and the brush sign.METHODS: Thirteen adult patients with MMA (24 affected hemispheres) were evaluated using brain MRI and CT perfusion. The T1w/T2w signal intensity ratio, which reflects white matter integrity, was calculated in watershed regions (centrum semiovale and middle frontal gyrus). Brush sign prominence was evaluated with susceptibility-weighted MRI. Additionally, brain perfusion parameters such as cerebral blood flow (CBF), cerebral blood volume (CBF), and mean transit time (MTT) were assessed. Correlations between white matter integrity and perfusion changes in watershed regions, as well as the prominence of the brush sign, were evaluated.RESULTS: Statistically significant negative correlations between the prominence of the brush sign and the T1w/T2w ratio values from the centrum semiovale and middle frontal white matter were found (R = -0.62 to 0.71, adjusted p < 0.05). Furthermore, there was a positive correlation between the T1w/T2w ratio values and the MTT values from the centrum semiovale (R = 0.65, adjusted p < 0.05).CONCLUSIONS: We revealed that T1w/T2w ratio changes are associated with the prominence of the brush sign as well as white matter hypoperfusion in watershed regions in patients with MMA. This could be explained by chronic ischemia due to venous congestion in the deep medullary vein territory.
AB - BACKGROUND: It has been shown recently using the T1w/T2w mapping technique that white matter microstructural integrity impairments exist in watershed regions patients with moyamoya angiopathy (MMA). We hypothesized that these changes could be associated with the prominence of other neuroimaging markers of chronic brain ischemia, such as perfusion delay and the brush sign.METHODS: Thirteen adult patients with MMA (24 affected hemispheres) were evaluated using brain MRI and CT perfusion. The T1w/T2w signal intensity ratio, which reflects white matter integrity, was calculated in watershed regions (centrum semiovale and middle frontal gyrus). Brush sign prominence was evaluated with susceptibility-weighted MRI. Additionally, brain perfusion parameters such as cerebral blood flow (CBF), cerebral blood volume (CBF), and mean transit time (MTT) were assessed. Correlations between white matter integrity and perfusion changes in watershed regions, as well as the prominence of the brush sign, were evaluated.RESULTS: Statistically significant negative correlations between the prominence of the brush sign and the T1w/T2w ratio values from the centrum semiovale and middle frontal white matter were found (R = -0.62 to 0.71, adjusted p < 0.05). Furthermore, there was a positive correlation between the T1w/T2w ratio values and the MTT values from the centrum semiovale (R = 0.65, adjusted p < 0.05).CONCLUSIONS: We revealed that T1w/T2w ratio changes are associated with the prominence of the brush sign as well as white matter hypoperfusion in watershed regions in patients with MMA. This could be explained by chronic ischemia due to venous congestion in the deep medullary vein territory.
KW - CT perfusion
KW - Magnetic Resonance Imaging (MRI)
KW - Moyamoya Angiopathy (MMA)
KW - Susceptibility Weighted Imaging (SWI)
KW - T1w/T2w ratio
UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85161623189&origin=inward&txGid=4041768da31bf7f20d61558bdae56378
UR - https://www.mendeley.com/catalogue/214e2773-7253-39c5-8640-09369e2f8428/
U2 - 10.1016/j.clineuro.2023.107821
DO - 10.1016/j.clineuro.2023.107821
M3 - Article
C2 - 37302378
VL - 231
JO - Clinical Neurology and Neurosurgery
JF - Clinical Neurology and Neurosurgery
SN - 0303-8467
M1 - 107821
ER -
ID: 53444425