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The Value of Non-Invasive Optimal Vessel Analysis Quantitative Magnetic Resonance Angiography for Studying Flow and

Fiona Helg1, Elisa Colombo1,2, Corinne Inauen3

  • 1Department of Neurosurgery, Clinical Neuroscience Center, University Hospital Zurich, 8091 Zurich, Switzerland.

Brain Sciences
|February 26, 2025
PubMed

Insights

Non-invasive optimal vessel analysis quantitative magnetic resonance angiography (NOVA-qMRA) effectively assesses blood flow in bilateral carotid artery disease. It aids in tailoring revascularization treatments by revealing critical flow patterns.

Area of Science:

  • Neurology
  • Radiology
  • Vascular Medicine

Background:

  • Bilateral internal carotid artery (ICA) steno-occlusive disease presents significant stroke risk, morbidity, and mortality.
  • Management of these complex cases requires precise assessment of cerebral hemodynamics.
  • Non-invasive optimal vessel analysis quantitative magnetic resonance angiography (NOVA-qMRA) offers a potential solution for evaluating flow and collateral patterns.

Purpose of the Study:

  • To evaluate the utility of NOVA-qMRA in assessing flow and collateral patterns in patients with bilateral carotid steno-occlusive disease.
  • To determine if NOVA-qMRA findings correlate with treatment decisions and outcomes.

Main Methods:

  • Retrospective analysis of 22 patients with bilateral ICA stenosis (≥50%) who underwent NOVA-qMRA.
  • Quantitative analysis of volume flow rates (VFRs) in the A2-ACA, M1-MCA, and P2-PCA segments.
  • Collection of demographic, clinical, and treatment data.

Main Results:

  • Nineteen of 22 patients (86%) were symptomatic.
  • In revascularized patients, mean M1-VFR was significantly lower on the treated side (88 mL/min) vs. contralateral (130 mL/min) (p=0.01).
  • P2-VFR was significantly higher in the treated subgroup (108 mL/min) compared to the non-treated group (83 mL/min) (p=0.04).

Conclusions:

  • NOVA-qMRA is a valuable tool for assessing cerebral blood flow and collateral patterns in bilateral carotid steno-occlusive disease.
  • M1-VFR and P2-VFR measurements derived from NOVA-qMRA can inform clinical decision-making for revascularization.
  • This technique aids in tailoring treatment strategies for improved patient management.

Keywords:
NOVA-qMRAsteno-occlusive diseasestroke

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