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  Indian J Med Microbiol
 

Figure 5: Images of different reconstruction settings for comparison. (a) Normal myocardial perfusion SPECT study reconstructed using ordered subset expectation maximization without filter by iteration–subset combination of (i) 2-2, (ii) 4-6, and (iii) 8-16. (b) Normal myocardial perfusion SPECT study reconstructed using ordered subset expectation maximization with filter by iteration–subset combination of (i) 2-2, (ii) 4-6, and (iii) 8-16. (c) Comparison of best images obtained by ordered subset expectation maximization reconstruction without filter (i) and with filter (ii) with the corresponding filtered back projection-reconstructed image (iii) in normal myocardial perfusion SPECT study. Images obtained by ordered subset expectation maximization reconstruction with filter (ii in Figure 5c) were found to be the best in quality and most appropriate for processing myocardial perfusion SPECT studies

Figure 5: Images of different reconstruction settings for comparison. (a) Normal myocardial perfusion SPECT study reconstructed using ordered subset expectation maximization without filter by iteration–subset combination of (i) 2-2, (ii) 4-6, and (iii) 8-16. (b) Normal myocardial perfusion SPECT study reconstructed using ordered subset expectation maximization with filter by iteration–subset combination of (i) 2-2, (ii) 4-6, and (iii) 8-16. (c) Comparison of best images obtained by ordered subset expectation maximization reconstruction without filter (i) and with filter (ii) with the corresponding filtered back projection-reconstructed image (iii) in normal myocardial perfusion SPECT study. Images obtained by ordered subset expectation maximization reconstruction with filter (ii in Figure 5c) were found to be the best in quality and most appropriate for processing myocardial perfusion SPECT studies