Table 3 Point system according to Stübig et al. [24]. Subjective Image Quality Total (SIQ), trabecular structure (TS)
Points | SIQ | Delineation of Cortical Bone | Delineation of Cancellous Bone | Delineation of Articular Surfaces | Artifacts | Clinical Assessment Total |
|---|---|---|---|---|---|---|
1 | Excellent | Excellent | TS perfectly visible | Excellent | No relevant artifacts | Very good evaluation, no open questions |
2 | Good | Good | TS clearly visible | Good | Few artifacts, barely disturbing | Good evaluation despite minor quality defects |
3 | Acceptable | Acceptable | TS moderately visible | Acceptable | Moderate artifacts, slightly disturbing | Evaluation generally possible with some open questions |
4 | Somewhat reduced | Barely visible, blurred edges | TS barely visible | Barely visible, blurred edges | Disturbing, evaluation rather limited | Limited evaluation, control scan recommended |
5 | Reduced | Completely blurred, no delineation | TS not visible | Completely blurred, no delineation | Very disturbing, evaluation impossible | No evaluation of query, CT recommended |