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Fig. 1 | EJNMMI Physics

Fig. 1

From: Theranostic SPECT reconstruction for improved resolution: application to radionuclide therapy dosimetry

Fig. 1

Transverse centre slice of IEC image quality phantom for each reconstruction method. a CT image (segmented spheres), b 68Ga PET, TOF + RM + 5 mm Gaussian, resampled to SPECT dimensions and used as prior image used in the SPECTRE reconstruction. c Our in-house routine qSPECT-OSEM reconstruction (4 iterations and 8 subsets), d OSEM + RM reconstruction (5 iterations and 12 subsets), e OSEM + RM reconstruction (40 iterations and 12 subsets), and f SPECTRE with RM [HKEM parameters: σp = 2, σs = 2, σdp = 5, σds = 5, NN = 5] (40 iterations and 12 subsets)

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