Fig. 4
From: Kidney dynamic SPECT acquisition on a CZT swiveling-detector ring camera: an in vivo pilot study
A CT image of the pig by the Starguide. ROIs were manually drawn around the left (blue) and right (green) kidneys. Final SPECT ROIs were obtained by extending the CT ROIs, as illustrated by the left (purple) and right (cyan) kidney’s ROIs extended by 1 cm in all directions. B NAC SPECT image corresponding to the fourth 30s frame reconstructed with 20 MLEM iterations, with kidney’s ROIs