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Emphysema Index Measurements at CT1 and CT2
Note.- EI -950 = emphysema indexes, as measured with threshold of -950 HU, between CT1 and CT2, EI -970 = emphysema indexes, as measured with threshold of -970 HU, between CT1 and CT2, HR = high resolution reconstruction algorithm, Perc50 = 50th percentile, Perc95 = 95th percentile, SD = standard deviation, Std = standard reconstruction algorithm
