Article Figures & Data
Figures
- fig 1.
Digital radiographs of the iodinated contrast-material–filled carotid artery phantom models. The measured degree of stenosis is 38% for phantom 1, 61% for phantom 2, 80% for phantom 3, and 92% for phantom 4
- fig 2.
2D projectional images of 3D k-space data. A, Superimposed squares show the percentages of k-space used to generate corresponding different MR angiographic maximum intensity projections (4.1/1.5, flip angle of 30°) of the phantom. B, Inverse Fourier transform of 2D projectional image is an MR angiographic image of phantom 2. Adequate luminal representation is maintained at 50% k-space, but is lost at 10% k-space.
- fig 3.
MR angiographic maximum intensity projections (4.1/1.5, flip angle of 30°) of phantom 4 show that luminal representation is maintained at 60% k-space, but is lost at 50% k-space (arrows)
- fig 4.
Plot of the ratio of luminal stenosis in the four phantoms shown by MR angiography (4.1/1.5, flip angle of 30°) divided by the standard of reference as a function of percent k-space. The ratio deviates from unity at higher percent k-space for phantoms with greater severity of stenosis
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