Figure 2.

The SPECT images by 3D-OSEM-CTAC with various reconstruction parameters. We chose the iteration of 10 and subset of 9 based on the visual assessment of the balance between spatial resolution and noise for the SPECT images

The SPECT images by 3D-OSEM-CTAC with various reconstruction parameters. We chose the iteration of 10 and subset of 9 based on the visual assessment of the balance between spatial resolution and noise for the SPECT images