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The most preferred radioisotope element for SPECT is

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in Clinical Science by (102k points)
The most preferred radioisotope element for SPECT is

(a) Mo

(b) W

(c) Tc

(d) Ba

The question was posed to me in a national level competition.

This key question is from PET & SPECT topic in chapter Diagnostic Investigation via Imaging Techniques of Clinical Science

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Best answer
The correct answer is (c) Tc

The best I can explain: Tc – 99m is activated Technetium which can be produced from Molybdenum. Tc – 99m has a half life of around 6hrs, is relatively easy to produce and can be flushed out of the body without causing much harm. It is also relatively stable and thus makes a good choice for SPECT scanning.

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