Comparison of Diagnostic Value for Chronic Kidney Disease between 640-Slice Computed Tomography Kidney Scan and Conventional Computed Tomography Scan

Table 1

Subjective scoring criteria for image quality.

Grade	Scoring criteria
1	With clear anatomical details and structures, sharp image edges, and no artifacts or obvious noise, the images could be used for diagnosis directly
2	With fairly clear anatomical details and slight artifacts and noise, the anatomical structures of the images could meet the diagnostic requirements
3	Fairly clear anatomical structures, vague image edges, and fairly obvious artifacts and noise
4	Unrecognizable fine anatomical structures, unclear images, and extremely obvious artifacts and noise