Half-life time
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Half life-life time
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Physical half life-life time (Tp)
The time interval required for an amount of certain radioactive nuclei to decay to its half of original value.
Biological half life-life time (Tb)
The time interval required for the body to eliminate 50% of any substance by normal routes of elimination: metabolic turn overturnover and excretion.
Effective half life-life time (Te)
The time interval required for the radioactivity of a certain amount of radioactive substance distributed in tissues and organs to decrease to half its original value due to radioactive decay and biological elimination.
The Physical half life-life time is longer than the biological half life timelifetime which is longer than the effective half life timelifetime.
1/Te = 1/Tp+1/Tb
-<h5>Physical half life time (T<sub>p</sub>)</h5><p>The time interval required for an amount of certain radioactive nuclei to decay to its half of original value.</p><h5>Biological half life time (T<sub>b</sub>) </h5><p>The time interval required for the body to eliminate 50% of any substance by normal routes of elimination: metabolic turn over and excretion.</p><h5>Effective half life time (T<sub>e</sub>)</h5><p>The time interval required for the radioactivity of a certain amount of radioactive substance distributed in tissues and organs to decrease to half its original value due to radioactive decay and biological elimination.</p><p><strong>The Physical half life time is longer than the biological half life time which is longer than the effective half life time.</strong></p><p><strong>1/T<sub>e</sub> = 1/T<sub>p</sub>+1/T<sub>b</sub></strong></p>- +<h5>Physical half-life time (T<sub>p</sub>)</h5><p>The time interval required for an amount of certain radioactive nuclei to decay to its half of original value.</p><h5>Biological half-life time (T<sub>b</sub>) </h5><p>The time interval required for the body to eliminate 50% of any substance by normal routes of elimination: metabolic turnover and excretion.</p><h5>Effective half-life time (T<sub>e</sub>)</h5><p>The time interval required for the radioactivity of a certain amount of radioactive substance distributed in tissues and organs to decrease to half its original value due to radioactive decay and biological elimination.</p><p><strong>The Physical half-life time is longer than the biological half lifetime which is longer than the effective half lifetime.</strong></p><p><strong>1/T<sub>e</sub> = 1/T<sub>p</sub>+1/T<sub>b</sub></strong></p>
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