Diagnostic accuracy of ultra-low-dose CT compared to standard-dose CT for identification of non-displaced fractures of the shoulder, knee, ankle, and wrist

Insights into Imaging

Table 4 Comparison of subjective CT image quality and the impact of subjective CT image quality on clinical decision-making between ULD-CT and SD-CT

Fracture		Subjective evaluation				Impact of image quality on clinical decision-making
Fracture		SD	ULD	Z	P	SD	ULD	Z	P
Shoulder (n = 24)	Score	4.99 ± 0.01	3.17 ± 0.38	− 4.61	< 0.0001	4.99 ± 0.01	3.33 ± 0.48	− 4.46	< 0.0001
Shoulder (n = 24)	ICC	0.99	0.65	− 4.61	< 0.0001	0.99	0.61	− 4.46	< 0.0001
Knee (n = 17)	Score	4.99 ± 0.01	3.06 ± 0.24	− 4.12	< 0.0001	4.99 ± 0.01	3.23 ± 0.44	− 3.83	< 0.0001
Knee (n = 17)	ICC	0.99	0.72	− 4.12	< 0.0001	0.99	0.75	− 3.83	< 0.0001
Ankle (n = 25)	Score	4.99 ± 0.01	4,16 ± 0.69	− 3.83	< 0.0001	4.99 ± 0.01	4.24 ± 0.66	− 3.76	< 0.0001
Ankle (n = 25)	ICC	0.99	0.96	− 3.83	< 0.0001	0.99	0.95	− 3.76	< 0.0001
Wrist (n = 26)	Score	4.99 ± 0.01	3.19 ± 0.40	− 4.78	< 0.0001	4.99 ± 0.01	3.45 ± 0.63	− 4.66	< 0.0001
Wrist (n = 26)	ICC	0.99	0.75	− 4.78	< 0.0001	0.99	0.90	− 4.66	< 0.0001