Table 1 SPECT acquisition parameters
From: Dual energy window imaging for optimisation of P/V ratios in VP SPECT
Camera model | Siemens Symbia—dual detector | Infinia Hawkeye—dual detector |
|---|---|---|
Collimators | LEAP | LEAP |
Collimator sensitivity (measured) (cps/MBq) | 133 | 119 |
Matrix | 64 × 64 | 64 × 64 |
Zoom | 1.45 | 1.3 |
Pixel size (mm) | 6.8 | 6.8 |
Primary energy window centre (keV) | 140 | 140 |
Primary energy window lower threshold (keV) | 129.5 | 129.5 |
Primary energy window upper threshold (keV) | 150.5 | 151 |
Secondary energy window centre (keV) | 119 | 119 |
Secondary energy window lower threshold (keV) | 108.5 | 108.5 |
Secondary energy window upper threshold (keV) | 129.5 | 129.5 |
Frames | 120 | 120 |
Angle step (degrees) | 3 | 3 |
Rotation (degrees) | 360 | 360 |
Frame duration ventilation SPECT (sec) | 10 | 12 |
Frame duration perfusion SPECT (sec) | 5 | 5 |