Table 2.

Detailed explanation of grading of image quality

Grade	Image quality
Grade 0	Poor image quality	Significant artifacts, no visibility of anatomical structures, no diagnostic confidence
Grade 1	Fair image quality	Major artifacts, poor visibility of anatomical structures, poor diagnostic confidence
Grade 2	Good image quality	Insignificant artifacts, adequate visibility of anatomical structures, good diagnostic confidence
Grade 3	Excellent image quality	No artifacts, full visibility of anatomical structures, high diagnostic confidence