Table 3 SPECT/CT acquisition parameters
Radionuclide | 133Ba cylinders | 131I cylinders | 131I uniform Jaszczak |
|---|---|---|---|
Collimator | High-energy | ||
Number of energy windows | 3 | ||
Photopeak energy (keV) | 356.0 ± 26.7 (15% width) | 364.5 ± 36.6 (20% width) | 364.5 ± 36.6 (20% width) |
Lower scatter energy (keV) | 321.0 ± 8.0 (5% width) | 317.1 ± 9.5 (6% width) | 317.1 ± 9.5 (6% width) |
High scatter energy (keV) | 403.0 ± 20.2 (10% width) | 411.9 ± 12.4 (6% width) | 411.9 ± 12.4 (6% width) |
Flood uniformity | As per clinical imaging protocol for 131I | ||
Matrix | 128 | ||
SPECT orbit | Body contour | ||
Number of projections | 120 (60 per detector) | ||
Time/projection | 30 s | 30 s | 60 s |
Detector movement | Step-and-shoot | ||
CT | Standard low-dose protocol | ||