Table 1.
Numerical parameters: entrance surface air kerma at PMMA phantom (Ka,e), air kerma at flat detector (AK), contrast-to-noise ratio (CNR) as defined in Eq. 1 and high contrast image resolution (HCSR) as defined in Eq. 2 for cine mode and all PMMA thicknesses and field of view (FOV) of 25 cm
| Numerical parameters | Matrix size and bits depth | 16 cm of PMMA | 20 cm of PMMA | 24 cm of PMMA | 28 cm of PMMA |
|---|---|---|---|---|---|
| kVp/mA | 67/430 | 71/620 | 75/854 | 86/833 | |
| Ka,e (μGy/fr) | 143.6 | 290.5 | 586.8 | 964.8 | |
| AK at flat detector (μGy/fr) | 0.732 | 0.734 | 0.745 | 0.685 | |
| CNR | 1,024 and 10 bits | 4.2 ± 0.4 | 3.1 ± 0.2 | 2.3 ± 0.2 | 1.81 ± 0.03 |
| 1,024 and 8 bits | 4.2 ± 0.3 | 3.1 ± 0.1 | 2.36 ± 0.06 | 1.76 ± 0.02 | |
| 512 and 10 bits | 5.4 ± 0.3 | 3.8 ± 0.1 | 3.1 ± 0.3 | 2.28 ± 0.08 | |
| 512 and 8 bits | 5.3 ± 0.4 | 3.72 ± 0.09 | 3.0 ± 0.3 | 2.3 ± 0.2 | |
| HCSR | 1,024 and 10 bits | 0.46 ± 0.02 | 0.335 ± 0.007 | 0.24 ± 0.01 | 0.145 ± 0.003 |
| 1,024 and 8 bits | 0.45 ± 0.01 | 0.338 ± 0.007 | 0.24 ± 0.01 | 0.144 ± 0.005 | |
| 512 and 10 bits | 0.34 ± 0.01 | 0.262 ± 0.008 | 0.191 ± 0.013 | 0.122 ± 0.002 | |
| 512 and 8 bits | 0.356 ± 0.008 | 0.259 ± 0.003 | 0.19 ± 0.01 | 0.119 ± 0.004 |