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Insights into Imaging
Fig. 1 | Insights into Imaging

Fig. 1

From: Optimal combination periprosthetic vasculature visualization and metal artifact reduction by spectral computed tomography using virtual monoenergetic images in total hip arthroplasty

Fig. 1

Illustration of the quantitative assessment of image quality. The axial slices where the vessel was most disturbed by the metal artifact were selected. Regions of interest (ROI) were placed in the external iliac or common femoral vessels (red circle) and the most pronounced hyperdense artifact (blue circle). Attenuation values and standard deviations within the ROI were automatically recorded. Additionally, the width of the most pronounced hyperdense artifact was measured close to the metal implant in its largest diameter (black line). ROIs were kept constant and measurements of width were conducted in the same location on CI, CIMAR, and VMIMAR (CI indicates conventional images; CIMAR indicates conventional images combined with orthopedic metal artifact reduction; VMIMAR indicates virtual monoenergetic images combined with orthopedic metal artifact reduction)

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