Table 4 Theoretical linear attenuation coefficients of lead at photopeak energies of Tc99m and I131 organised by interaction
Lead | 140 keV | 364 keV | ||
|---|---|---|---|---|
Interaction | % contribution | μ (cm−1) | % contribution | μ (cm− 1) |
Incoherent | 4.0 | 1.09 | 27.4 | 0.86 |
Coherent | 5.0 | 1.34 | 7.6 | 0.24 |
Photoelectric | 91.0 | 24.68 | 65.0 | 2.03 |
Total | – | 27.11 | – | 3.12 |