Article Figures & Data
Figures
- FIG 1.
A 44-year-old woman with a saccular intracranial aneurysm. EID-CT (A and C) and UHR PCD-CT (B, D–G) angiograms of the head show an intracranial saccular aneurysm of the left paraclinoid ICA (arrows). PCD-CT reconstructions show increasing vessel sharpness with higher kernel levels: D, (Bv36). E, (Bv40). F, (Bv44). G, (Bv48). Window settings were identical in each image.
- FIG 2.
Quantitative image-quality analysis. Signal, noise, SNR, and CNR scores of the PCD-CT (Bv36, Bv40, Bv44, Bv48) and EID-CT images are represented with error bars (mean [SD]).
- FIG 3.
Example of vessels sharpness measurements. Line profiles of the MCA and corresponding images: EID-CT (upper row), PCD-CT Bv36 (middle row), PCD-CT Bv48 (lower row). A steeper slope representing a sharper vessel wall can be observed in the Bv48 image (vessel sharpness = 217.8 maximum ΔHU), compared with the Bv36 (vessel sharpness = 139.8 maximum ΔHU) and the EID-CT image (vessel sharpness = 102.6 maximum ΔHU).
- FIG 4.
Qualitative image-quality scores from the EID-CT and PCD-CT CT (Bv36, Bv40, Bv44, Bv48) images. Stacked bar charts show the pooled ratings from 3 readers in percentages. The 10 evaluated intracranial locations are the following: ICA (C2 segment), PICA, basilar artery (BA), AcomA, OA, carotid terminus (CT), MCA, VB, PcomA and the location of the aneurysm/s. Interpretation of scores: 5 = excellent image quality, 4 = good image quality, 3 = acceptable image quality, 2 = barely satisfactory image quality, 1 = unacceptable image quality.
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