Table 3.
Phantom | Contrast | Variability of reference (mm) | ||
---|---|---|---|---|
Interoperator | Intraoperator | Overall | ||
NEMA | 9.7:1 | 0.32 [0.27, 0.37] | 0.39 [0.36, 0.41] | 0.50 [0.47, 0.53] |
CTN | 4:1 | 0.30 [0.23, 0.36] | 0.56 [0.53, 0.58] | 0.63 [0.60, 0.66] |
CTN | 2:1 | 0.34 [0.26, 0.41] | 0.64 [0.61, 0.67] | 0.72 [0.69, 0.76] |