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Regarding “Altered Blood Flow in the Ophthalmic and Internal Carotid Arteries in Patients with Age-Related Macular Degeneration Measured Using Noncontrast MR Angiography at 7T”

Regarding “Altered Blood Flow in the Ophthalmic and Internal Carotid Arteries in Patients with... LETTERS Regarding “Altered Blood Flow in the Ophthalmic and Internal Carotid Arteries in Patients with Age-Related Macular Degeneration Measured Using Noncontrast MR Angiography at 7T” e read with great interest the article by Hibert et al, single measurement cannot conclude that the maximum vari- W“Altered Blood Flow in the Ophthalmic and Internal ability is indeed 10%. This issue is especially true if we consider Carotid Arteries in Patients with Age-Related Macular that flow measurement with phase-contrast MR imaging was Degeneration Measured Using Noncontrast MR Angiography shown to have a certain level of intermeasurement variability, at 7T.” On the basis of MR imaging of the ophthalmic arteries increasing with higher-degree stenosis. We believe that further (OAs) and the internal carotid artery and the study of the dif- assessment was necessary to conclude that variability in the ference between patients with age-related macular degenera- measurements did not exceed or invalidate the findings of this tion (AMD) and healthy controls in terms of flow velocities study. and volume flows, they suggested that OA volume flow is Furthermore, the authors mentioned a specific analysis reduced and flow velocity is increased in patients with AMD, of patients who had AMD at different stages between http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png American Journal of Neuroradiology American Journal of Neuroradiology

Regarding “Altered Blood Flow in the Ophthalmic and Internal Carotid Arteries in Patients with Age-Related Macular Degeneration Measured Using Noncontrast MR Angiography at 7T”

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Publisher
American Journal of Neuroradiology
Copyright
© 2022 by American Journal of Neuroradiology
ISSN
0195-6108
eISSN
1936-959X
DOI
10.3174/ajnr.a7479
Publisher site
See Article on Publisher Site

Abstract

LETTERS Regarding “Altered Blood Flow in the Ophthalmic and Internal Carotid Arteries in Patients with Age-Related Macular Degeneration Measured Using Noncontrast MR Angiography at 7T” e read with great interest the article by Hibert et al, single measurement cannot conclude that the maximum vari- W“Altered Blood Flow in the Ophthalmic and Internal ability is indeed 10%. This issue is especially true if we consider Carotid Arteries in Patients with Age-Related Macular that flow measurement with phase-contrast MR imaging was Degeneration Measured Using Noncontrast MR Angiography shown to have a certain level of intermeasurement variability, at 7T.” On the basis of MR imaging of the ophthalmic arteries increasing with higher-degree stenosis. We believe that further (OAs) and the internal carotid artery and the study of the dif- assessment was necessary to conclude that variability in the ference between patients with age-related macular degenera- measurements did not exceed or invalidate the findings of this tion (AMD) and healthy controls in terms of flow velocities study. and volume flows, they suggested that OA volume flow is Furthermore, the authors mentioned a specific analysis reduced and flow velocity is increased in patients with AMD, of patients who had AMD at different stages between

Journal

American Journal of Neuroradiology – American Journal of Neuroradiology

Published: Dec 1, 2022

References

  • Altered blood flow in the ophthalmic and internal carotid arteries in patients with age-related macular degeneration measured using noncontrast MR angiography at 7T
    ML. Hibert; YI. Chen; N. Ohringer
  • Effects of age on the peak ratio of ophthalmic artery Doppler
    XY. Yang; LF. Xu; Y. Luo
  • The relationship between cardiovascular risk scores and several markers of subclinical atherosclerosis in an asymptomatic population
    O. Mitu; A. Crisan; S. Redwood
  • Accuracy of flow measurement with phase contrast MRI in a stenotic phantom: where should flow be measured?
    I. Khodarahmi; M. Shakeri; M. Kotys-Traughber
  • Ophthalmic artery angioplasty for age-related macular degeneration
    I. Lylyk; C. Bleise; PN. Lylyk