Asked by dallasboy
Which characteristics of a radioisotope make it useful for diagnosing medical problems?
a long half-life and it is taken up by a specific part of the body
a long half-life and it is not taken up by the body
a short half-life and it is taken up by a specific part of the body
a short half-life and it is not taken up by the body
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Answered by
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A short half-life and it is taken up by a specific part of the body.
Explanation: uptake by the target organ gives useful imaging contrast, while a short half-life minimizes the patient's radiation dose (but must be long enough to perform the scan). Example: technetium‑99m (≈6 h half‑life) is widely used for diagnostic scans.
Explanation: uptake by the target organ gives useful imaging contrast, while a short half-life minimizes the patient's radiation dose (but must be long enough to perform the scan). Example: technetium‑99m (≈6 h half‑life) is widely used for diagnostic scans.
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