2D mode and 3D mode

Without Slat Collimators or Septa (3D mode):

• Sensitivity to trues ? (maybe 6 times)

• Sensitivity to scatter and singles  (and therefore randoms and dead-time) ? EVEN MORE

With Slat Collimators or Septa (2D):

• Sensitivity to trues much less

• Sensitivity to scatter and singles  (and therefore randoms and dead-time) reduced even more

• 2D necessary for whole-body DHCI

• 3D for full-ring brain, but 2D for whole-body  (this may change to 3D)

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