design of phantom and metallic implants for 3d - ePrints@USM
design of phantom and metallic implants for 3d - ePrints@USM
design of phantom and metallic implants for 3d - ePrints@USM
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ρ Density <strong>of</strong> the material<br />
µ/ρ Total mass attenuation coefficient <strong>for</strong> gamma ray interactions<br />
τ/ρ Mass attenuation coefficient <strong>of</strong> photoelectric process<br />
σ/ρ Mass attenuation coefficient <strong>of</strong> Compton effect<br />
κ/ρ Mass attenuation coefficient <strong>of</strong> pair production<br />
∆N Numbers <strong>of</strong> atoms <strong>of</strong> the nuclide in the sample present at a time, t<br />
∆t Time<br />
λ Decay constant<br />
A Activity <strong>of</strong> the nuclide (disintegrations/second)<br />
λ Decay constant (s -1 )<br />
N(t) Number <strong>of</strong> atoms at a time, t<br />
N0 Number <strong>of</strong> atoms initially present<br />
λ Decay constant<br />
t Time<br />
t1/2 Half-life<br />
µT Linear attenuation coefficient <strong>of</strong> tissue<br />
µwater<br />
g Gram<br />
Bq Becquerel<br />
Linear attenuation coefficient <strong>of</strong> water<br />
MBq Mega Becquerel<br />
GBq Giga Becquerel<br />
ml Millilitre<br />
kg kilogram<br />
Ge Germanium<br />
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