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In a material medium, when a positron meets an electron both the particles annihilate leading to the emission of two gamma ray photons.

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In a material medium, when a positron meets an electron both the particles annihilate leading to the emission of two gamma ray photons. This process forms the basis of an important diagnostic procedure called

(a) MRI

(b) PET

(c) CAT

(d) SPECT

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The correct option is (b) PET.

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