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The most preferred radioisotope element for SPECT is(a) Mo(b) W(c) Tc(d) BaThe 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

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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