Table 5 Low-contrast resolution results of the CT scan
Low-contrast resolution | ROIs | Insert | Background #1 | Background #2 | Background #3 |
|---|---|---|---|---|---|
0.5% | CT value (HU) | 7.73 | 1.04 | 3.30 | 3.32 |
SD (HU) | 2.37 | 2.18 | 2.28 | 1.83 | |
Mean of ΔCT (HU) | 5.18 | ||||
CNR | 2.47 | ||||
1.0% | CT value (HU) | 11.16 | 1.61 | 1.57 | 1.04 |
SD (HU) | 2.03 | 2.08 | 1.98 | 2.18 | |
Mean of ΔCT (HU) | 9.75 | ||||
CNR | 4.69 | ||||
1.5% | CT value (HU) | 20.23 | 4.29 | 4.85 | 5.36 |
SD (HU) | 1.89 | 2.24 | 1.80 | 2.44 | |
Mean of ΔCT (HU) | 15.40 | ||||
CNR | 7.25 | ||||