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Table 1 Inter-calibration of pixel intensity (grayscales) to account for scanning artifacts detected (see Methods); X represents the raw measurements for grayscales and the calibration equation was applied to correct scanning artifacts.

From: An investigation of the efficacy and mechanism of contrast-enhanced X-ray Computed Tomography utilizing iodine for large specimens through experimental and simulation approaches

Scan Timing Air Brain Range Average air Average range: brain-air Calibration equation
N (control)   11988 21532 9543 13192 8635 X *8635/9543 + 13192-11988* 8635/9543
A Day 5 13415 21113 7699 (N, A, and B)   X *8635/7699 + 13192-13415* 8635/7699
B Day 10 14174 22835 8661    X *8635/8661 + 13192-14174* 8635/8661
C Day 34 14335 23019 8685 15206 8278 X *8278/8685 + 15206-14335* 8278/8685
D Day 49 16078 23950 7872 (C and D)   X *8278/7872 + 15206-16078* 8278/7872
  1. * represent multiple; original measurements and calculation were conducted with two decimals and rounded to integer shown here