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Table 5 Measured attanution cooficients of lead and comparison to theoretical

From: Characterisation of the attenuation properties of 3D-printed tungsten for use in gamma camera collimation

  Measured μ (cm−1) % deviation from theoretical (including Coherent scatter) % deviation from theoretical (excluding Coherent scatter)
Lead disks @ 140 keV 26.0 ± 0.2 − 4.1% 0.9%
Lead disks @ 364 keV Tungsten 2.8 ± 0.2 − 9.6% − 2.1%