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CT image uniformity
| Location | Background | Boundary | Purified water | |||
|---|---|---|---|---|---|---|
| ROIs | CT value (HU) | ΔCT value (HU) | CT value (HU) | ΔCT value (HU) | CT value (HU) | ΔCT value (HU) |
| ROI-c | 4.51 | 0 | 4.51 | 0 | 4.51 | 0 |
| ROI-1 | 6.1 | 1.59 | 6.21 | 1.7 | 3.74 | 0.77 |
| ROI-2 | 5.15 | 0.64 | 5.77 | 1.26 | 2.88 | 1.63 |
| ROI-3 | 6.46 | 1.95 | 4.88 | 0.37 | 3.2 | 1.31 |
| ROI-4 | 6.58 | 2.07 | 5.78 | 1.27 | 2.66 | 1.85 |
| Image uniformity | 2.07 | 1.7 | 1.85 | |||
ΔCT = CTROI-i − CTROI-c i = 1, 2, 3. Numbers in bold represent the CT image uniformity measurement results
