Table 1.

Qualitative scoring description

Metal artifact severity and diagnose confidence		Resolution
Score	Definition	Score	Definition
1	Marked artifacts, which completely non-diagnostic	1	The resolution is far lower than FBP images
2	Major artifacts, which impairing diagnosis	2	The resolution is lower than FBP images
3	Moderate artifacts, which easing diagnosis	3	The resolution of FBP images were set 3 point as control group
4	Minor artifacts, which probably easing diagnosis	4	The resolution is higher than FBP images
5	No artifact and no influence on diagnosis	5	The resolution is far higher than FBP images
The extent of new artifacts		The contours of different soft tissue interfaces
Score	Definition	Score	Definition
1	Absent	1	Completely indistinguishable
2	Mild, acceptable	2	Poor
3	Moderate, partially impaired diagnosis	3	Moderate
4	Severe, mostly impaired diagnosis	4	Good
5	Extensive, undiagnostic	5	Excellent