Figure 2

Images of 1.7 MeV gamma-ray beams irradiating from 0° and 20° off the axis of the camera. (left) Simple back projection image. (right) ML-EM image (iteration: 5 times).

Images of 1.7 MeV gamma-ray beams irradiating from 0° and 20° off the axis of the camera. (left) Simple back projection image. (right) ML-EM image (iteration: 5 times).