Contrast material–enhanced MRA overestimates severity of carotid stenosis, compared with 3D time-of-flight MRA Tiffany C Townsend, MD, David Saloner,

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Presentation transcript:

Contrast material–enhanced MRA overestimates severity of carotid stenosis, compared with 3D time-of-flight MRA Tiffany C Townsend, MD, David Saloner, PhD, Xian Mang Pan, MD, Joseph H Rapp, MD Journal of Vascular Surgery Volume 38, Issue 1, Pages 36-40 (July 2003) DOI: 10.1016/S0741-5214(03)00332-X

Fig 1 Magnetic resonance angiograms (MRA) of same carotid artery in vivo. Contrast-enhanced MRA (left) shows flow void; time-of-flight MRA (right) does not. Journal of Vascular Surgery 2003 38, 36-40DOI: (10.1016/S0741-5214(03)00332-X)

Fig 2 Silicone phantom of a carotid bifurcation with 80% internal carotid artery stenosis imaged with both contrast-enhanced magnetic resonance angiography (CE-MRA; left) and time-of-flight MRA (right). CE-MRA demonstrates flow void in both internal and external carotid arteries at areas of stenosis. Journal of Vascular Surgery 2003 38, 36-40DOI: (10.1016/S0741-5214(03)00332-X)

Fig 3 Contrast-enhanced magnetic resonance angiograms of phantom with flow (left) and without flow (right) through the phantom show excellent resolution of the phantom without flow but loss of signal with flowing medium. Journal of Vascular Surgery 2003 38, 36-40DOI: (10.1016/S0741-5214(03)00332-X)

Fig 4 Contrast-enhanced magnetic resonance angiograms of phantom with standard (left) and increased in-plane resolution (right). Journal of Vascular Surgery 2003 38, 36-40DOI: (10.1016/S0741-5214(03)00332-X)

Fig 5 Contrast-enhanced magnetic resonance angiograms of phantom without (left) and with (right) flow compensation. Journal of Vascular Surgery 2003 38, 36-40DOI: (10.1016/S0741-5214(03)00332-X)

Fig 6 Contrast-enhanced magnetic resonance angiograms of phantom with frequency encoding gradients aligned along vessel axis (left) and at 90 degrees to the vessel axis (right). Journal of Vascular Surgery 2003 38, 36-40DOI: (10.1016/S0741-5214(03)00332-X)