Fig. 5

Representative images of under-detection (a, b) and over-detection (d, e) on radial-VIBE compared to CT. Images a and b are axial slices of radial-VIBE and image C is an axial slice of CT from the same patient. Red arrows on images a and b indicate calcifications, which appear as hypointense voxels. Red areas on image b illustrate the voxels that are considered as calcifications by the segmentation algorithm. Images d and e are identical axial slices of radial-VIBE belonging to another patient, and image F is the corresponding CT slice. Red areas on image e are the voxels considered as calcifications by the segmentation algorithm, which are likely to be noise and not genuine calcifications. For these two patients, the subjective analysis deemed excellent agreement between radial-VIBE and CT, despite the quantitative analysis differing significantly