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Imaging of the pial arterial vasculature of the human brain in vivo using high-resolution 7T time-of-flight angiography.
Bollmann, Saskia; Mattern, Hendrik; Bernier, Michaël; Robinson, Simon D; Park, Daniel; Speck, Oliver; Polimeni, Jonathan R.
Afiliação
  • Bollmann S; Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, United States.
  • Mattern H; Department of Radiology, Harvard Medical School, Boston, United States.
  • Bernier M; Centre for Advanced Imaging, The University of Queensland, Brisbane, Australia.
  • Robinson SD; Department of Biomedical Magnetic Resonance, Institute of Experimental Physics, Otto-von- Guericke-University, Magdeburg, Germany.
  • Park D; Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, United States.
  • Speck O; Department of Radiology, Harvard Medical School, Boston, United States.
  • Polimeni JR; Centre for Advanced Imaging, The University of Queensland, Brisbane, Australia.
Elife ; 112022 04 29.
Article em En | MEDLINE | ID: mdl-35486089
The pial arterial vasculature of the human brain is the only blood supply to the neocortex, but quantitative data on the morphology and topology of these mesoscopic arteries (diameter 50-300 µm) remains scarce. Because it is commonly assumed that blood flow velocities in these vessels are prohibitively slow, non-invasive time-of-flight magnetic resonance angiography (TOF-MRA)-which is well suited to high 3D imaging resolutions-has not been applied to imaging the pial arteries. Here, we provide a theoretical framework that outlines how TOF-MRA can visualize small pial arteries in vivo, by employing extremely small voxels at the size of individual vessels. We then provide evidence for this theory by imaging the pial arteries at 140 µm isotropic resolution using a 7 Tesla (T) magnetic resonance imaging (MRI) scanner and prospective motion correction, and show that pial arteries one voxel width in diameter can be detected. We conclude that imaging pial arteries is not limited by slow blood flow, but instead by achievable image resolution. This study represents the first targeted, comprehensive account of imaging pial arteries in vivo in the human brain. This ultra-high-resolution angiography will enable the characterization of pial vascular anatomy across the brain to investigate patterns of blood supply and relationships between vascular and functional architecture.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Encéfalo / Angiografia por Ressonância Magnética Tipo de estudo: Observational_studies Limite: Humans Idioma: En Ano de publicação: 2022 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Encéfalo / Angiografia por Ressonância Magnética Tipo de estudo: Observational_studies Limite: Humans Idioma: En Ano de publicação: 2022 Tipo de documento: Article