Table 2 Subjective evaluation of cone-beam (CBCT) and multidetector CT (MDCT) image quality by two radiologists (R1, R2) using a seven-point Likert scale
Score | Regular-dose CBCT | Low-dose CBCT | Regular-dose MDCT | Low-dose MDCT | |||||
|---|---|---|---|---|---|---|---|---|---|
R1 | R2 | R1 | R2 | R1 | R2 | R1 | R2 | ||
Overall image quality | 7 | 16 (100.0) | 13 (81.3) | 7 (43.8) | 8 (50.0) | 1 (6.3) | 3 (18.8) | – | – |
6 | – | 3 (18.8) | 9 (56.3) | 7 (43.8) | 9 (56.3) | 4 (25.0) | – | – | |
5 | – | – | – | 1 (6.3) | – | 3 (18.8) | 2 (12.5) | 5 (31.3) | |
4 | – | – | – | – | 4 (25.0) | 3 (18.8) | 6 (37.5) | 2 (12.5) | |
3 | – | – | – | – | 2 (12.5) | 3 (18.8) | 2 (12.5) | 4 (25.0) | |
2 | – | – | – | – | – | – | 5 (31.3) | 3 (18.8) | |
1 | – | – | – | – | – | – | 1 (6.3) | 2 (12.5) | |
Median | 7.0 | 7.0 | 6.0 | 6.5 | 6.0 | 5.0 | 3.5 | 3.0 | |