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Which of the following radiations are used for imaging purposes?

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in Clinical Science by (102k points)
Which of the following radiations are used for imaging purposes?

(a) alpha

(b) beta

(c) gamma

(d) delta

This question was posed to me in an online interview.

The origin of the question is PET & SPECT in portion Diagnostic Investigation via Imaging Techniques of Clinical Science

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Best answer
Correct answer is (c) gamma

The explanation is: Gamma rays are energy rays or photon rays and do not have a mass. Thus, they do not destroy the cancerous cells or provide any relief in therapies. However, since they have a greater penetration power, they can be used for imaging. If the body is exposed to these penetrating radiations for a long time, the body may have burn and a prolonged and continuous exposure will result in damaged DNA. Increasing the intensity of the radiations also causes harm to the body.

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