Table 1.

Grading Scales for the Qualitative Image Analysis

Grading Score	Subjective image noise	Image sharpness	Artifacts	Diagnostic confidence
1	Unacceptable noise	Blurry	Major	Unacceptable
2	Above average	Worse than average	Minor	Poor
3	Average	Average	Very little	Average
4	Less than average	Better than average	None	High
5	Minimal	Sharpest		Excellent