Fig. 3.

Results from DL-based generation of attenuation correction maps from SPECT MPI images [16]. Left panel shows images of the primary, scatter window SPECT reconstructions, the synthetic attenuation maps, and CT-based attenuation (true) maps in the axial, coronal, and sagittal views. Right panel shows SPECT reconstructed images corrected using CT-based (true) attenuation maps, synthetic attenuation maps generated by the Generative Adversarial Network (GAN) and without attenuation correction in short axis (SA) and vertical long axis (VLA) views. Note in the right panel the agreement between the true corrected and corrected with synthetic DL-generated ATTMAP short axis (SA) views and vertical long axis (VLA) views. Note that the uncorrected bottom slices show inferior wall attenuation artifacts absent in the corrected ones. ATTMAP, attenuation map, w, with, w.no, without. Reprint with permission from [16], Shi et al., Eur J Nucl Med Mol Imag, 2020