Table 2 Parameter values before, during, and after calibration
From: Multimodality calibration for simultaneous fluoroscopic and nuclear imaging
Parameter | Pinhole nr. | Direct physical measurement (before) | Calibration pinhole positions (step 1) | Calibration effective size x-ray detector (step 2) | Calibration position x-ray detector (step 3) |
|---|---|---|---|---|---|
x pinhole (cm) | 1 | −5.40 | −5.527 ± 0.001 | * | * |
2 | −5.50 | −5.488 ± 0.020 | * | * | |
3 | 5.40 | 5.291 ± 0.020 | * | * | |
4 | 5.50 | 5.551 ± 0.005 | * | * | |
y pinhole (cm) | 1 | −8.90 | −8.810 ± 0.007 | * | * |
2 | 8.90 | 8.911 ± 0.020 | * | * | |
3 | −9.15 | −9.094 ± 0.036 | * | * | |
4 | 9.15 | 9.057 ± 0.049 | * | * | |
d x-ray detector (cm) |  | 22.86 | 22.86 | 21.39 ± 0.02 | * |
x x-ray detector (cm) |  | 0.00 | 0.00 | 0.00 | −1.14 ± 0.07 |
y x-ray detector (cm) |  | 0.00 | 0.00 | 0.00 | 0.16 ± 0.03 |