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Arterial-optimized 4D-flow MRI for quantifying flow and pulsatility in venous sinuses and large cerebral veins
Umeå universitet, Medicinska fakulteten, Institutionen för diagnostik och intervention. Umeå universitet, Medicinska fakulteten, Institutionen för klinisk vetenskap, Neurovetenskaper.
Umeå universitet, Medicinska fakulteten, Institutionen för diagnostik och intervention. Umeå universitet, Medicinska fakulteten, Umeå centrum för funktionell hjärnavbildning (UFBI). Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för tillämpad fysik och elektronik.ORCID-id: 0000-0001-6784-1945
Umeå universitet, Medicinska fakulteten, Institutionen för klinisk vetenskap, Neurovetenskaper.ORCID-id: 0000-0001-6451-1940
Umeå universitet, Medicinska fakulteten, Institutionen för diagnostik och intervention.ORCID-id: 0000-0002-2031-722X
2025 (engelsk)Inngår i: Scientific Reports, E-ISSN 2045-2322, Vol. 15, nr 1, artikkel-id 41181Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A single, arterial-optimized 4D-flow MRI acquisition may enable fast assessment of both cerebral arterial and venous flow. However, arteries and veins require different velocity encoding (VENC) settings for optimal velocity-to-noise ratio (VNR). Consequently, venous measurements using arterial-optimized VENC settings are subject to reduced VNR and require further evaluation. This study compared cerebral venous flow and pulsatility assessments using a high-VENC (110 cm/s, adapted to the arterial system) and a low-VENC (40 cm/s, adapted to the venous system) 4D-flow MRI sequence at 3 Tesla. Flow and pulsatility index (PI) were calculated for cerebral veins, sinuses and internal jugular veins in 36 elderly volunteers (79 ± 5 years). The high-VENC acquisitions allowed visualization of nearly all venous structures. Mean flow differences were small and the correlation, strong, when comparing both acquisitions across sinuses (R = 0.90–0.99, difference = -8–7%) and cortical veins (R = 0.93, difference = − 6%). Inflow-outflow differences at the confluence of sinuses were similar between acquisitions. PI showed moderate to strong agreement except in the straight sinus. Both the vein of Galen and the jugular veins suffered from aliasing in the venous VENC acquisitions. In summary, this study demonstrated that a VENC setting adapted for the arterial cerebral circulation was feasible for studying cerebral venous flow and pulsatility.

sted, utgiver, år, opplag, sider
Springer Nature, 2025. Vol. 15, nr 1, artikkel-id 41181
Emneord [en]
4D flow MRI, Cerebral sinus, Cerebral vein, Hemodynamics, Velocity encoding
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Identifikatorer
URN: urn:nbn:se:umu:diva-246954DOI: 10.1038/s41598-025-28405-8PubMedID: 41266760Scopus ID: 2-s2.0-105022640890OAI: oai:DiVA.org:umu-246954DiVA, id: diva2:2019355
Forskningsfinansiär
Swedish Foundation for Strategic Research, RMX18-0152Swedish Research Council, 2015–05616Region VästerbottenTilgjengelig fra: 2025-12-05 Laget: 2025-12-05 Sist oppdatert: 2025-12-05bibliografisk kontrollert

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Westlund, ArvidWåhlin, AndersMalm, JanEklund, Anders

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