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"SPECT.mac" is a macro which defined a complete simulation
for SPECT application.

- The SPECT scanner is defined with the SPECThead system
- The camera is NaI camera with 4 heads and paralel collimator 
- An orbiting movement of the camera is defined
- A translation movement of the bed and the phantom is defined
- Phantom : water cylinder
- Source : gamma 140 keV
- Dynamic acquisition : 16 frames of 37.5 secondes




