Carotid Artery Stenosis - Case Study

Courtesy of Dr. W. Dennis Foley
Froedtert Memorial Lutheran Hospital, Medical College of Wisconsin, Milwaukee, WI USA

Carotid Artery Stenosis

User-selected transparency
Multi-focal plaques
Volume rendering of the anatomy from aortic arch to Circle of Willis with user-selected transparency.   Volume rendering of the anatomy from aortic arch to Circle of Willis demonstrating multi-focal plaques.  

Clinical Background

  • 90-year- old male patient with right hemisphere TIA and right neck bruit.
  • Define any disease suggested by bruit and provide complete high-resolution arterial roadmap from Aortic arch to Circle of Willis.

Curved reformat of left side. Axial reformat Curved reformat
Curved reformat of left side.   Axial reformat of 3 mm demonstrating the right and the left-sided plaque at the level of the carotid bifurcation. Curved reformat of right side demonstrating the significant stenosis.  

Diagnosis

  • High-grade atherosclerotic stenosis of the proximal right internal carotid artery. Calcific plaque with insignificant stenosis of the left internal carotid artery. Normal vertebral basilar system and intact Circle of Willis.
  • With its wide coverage, LightSpeed VCT provided a high-resolution arterial roadmap with 50 cc of contrast agent.

Scan Technique

  • Detector Configuration: 64 x 0.625 mm at 40 mm coverage per rotation
  • Gantry Speed: 0.5 sec
  • Scan Time: 4.2 sec
  • Pitch: 0.984
  • Scan Coverage: 338 mm
  • Contrast: 60 cc @ 5 cc/sec with 30 cc saline flush

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