EJNMMI Physics

Table 2 Concordance correlation coefficients for OSEM reconstructions for patients whose unaltered activity ratio was > 90%

From: Time-modified OSEM algorithm for more robust assessment of left ventricular dyssynchrony with phase analysis in ECG-gated myocardial perfusion SPECT

AR (%)	BW			StD			ENT
90 vs.	CCC	C_b	r	CCC	C_b	r	CCC	C_b	r
80	0.820	0.853	0.961	0.856	0.870	0.984	0.970	0.974	0.996
70	0.653	0.700	0.933	0.578	0.630	0.918	0.879	0.889	0.989
60	0.473	0.536	0.882	0.279	0.407	0.685	0.729	0.756	0.965
50	0.362	0.433	0.836	0.168	0.289	0.582	0.653	0.671	0.973

AR activity ratio, BW bandwidth, StD standard deviation, ENT entropy, CCC concordance correlation coefficient, C_b bias correction factor, r Pearson’s correlation coefficient

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