Diagnosing Carotid Near-Occlusion with Phase-Contrast MRI

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Abstract
SUMMARY: Carotid near-occlusion is a frequently overlooked diagnosis when CTA examinations are assessed in routine practice. To evaluate the potential value of phase-contrast MR imaging in identifying near-occlusion, we examined 9 carotid near-occlusions and 20 cases of conventional ≥50% carotid stenosis (mean stenosis degree, 65%) with phase-contrast MR imaging. Mean ICA flow was lower in near-occlusions (52 mL/min) than in conventional ≥50% stenosis (198 mL/min, P < .001). ICA flow of ≤110 mL/min was 100% sensitive and specific for near-occlusion. Phase-contrast MR imaging is a promising tool for diagnosing carotid near-occlusion.
Funding Information
  • Hjärt-Lungfonden (20140592)
  • The Northern Swedish Stroke fund
  • The Swedish Stroke fund
  • Svenska Läkaresällskapet
  • Knut och Alice Wallenbergs Stiftelse
  • The research fund for neurological research at the university hospital of northern Sweden
  • Region Västerbotten
  • Vetenskapsrådet (2015-05616, 2017-04949)

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