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Radiotracers generally have short half lives. Detection requires a number of decay events. Using material with a short half life means a smaller amount is required and that after the detection the amount of residual radiation is reduced.

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14y ago
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13y ago

No. Its generally the other way around. The short-lived natural isotopes have all decayed, so only the long-lived natural isotopes remain.

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11y ago

Short half-lives

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Q: Do radiotracers generally have long or short half-lives?
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