Table 1 Description of the categories of image quality characteristics
Image quality characteristic | Score | ||||
|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | |
Noise | Excessive noise, impairs diagnostic quality | Substantial noise increase; reduced image quality | Moderate increase of noise compared to current standard | Average noise; equal to current standard | Low noise magnitude, lower than current standard |
Subjective sharpness | Excessive blurring, impairs diagnostic quality | Substantial blurring; reduced image quality | Moderate sharpness; less sharpness compared to current standard | Average sharpness; equal to current standard | Sharp delineation of structures, superior to current standard |
Natural appearance | Unnatural appearance impairing diagnostic quality | Substantial unnatural appearance, moderate impairment of diagnostic quality | Moderate unnatural appearance, not impairing diagnostic quality | Natural appearance is normal, equal to current standard | Natural appearance is superior to current standard |