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European Radiology Experimental
Fig. 3 | European Radiology Experimental

Fig. 3

From: Photon-counting CT of elbow joint fractures: image quality in a simulated post-trauma setting with off-center positioning

Fig. 3

a Example of region of interest (ROI) placement for SNR/CNR measurements. The larger circle indicates the HU-measurements in the distal humerus. The smaller circle was placed in a homogeneous region of subcutaneous fat tissue and served as background for the calculations. Identical measurements were performed on three consecutive axial slices. b Example of cortical sharpness measurements with line profile analysis performed at the dorsal cortex of the humerus. CNR Contrast-to-noise ratio, SNR Signal-to-noise ratio

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