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Radiopharmaceuticals are compounds consisting of a chemical…

Radiopharmaceuticals are compounds consisting of a chemical substrate linked to a radioactive element.

Published March 26, 2025
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The finite distance which the positron travels before annihi…

The finite distance which the positron travels before annihilation with an electron defines a sphere of uncertainty in SPECT.

Published March 26, 2025
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The iterative algorithm of image reconstruction for CT scans…

The iterative algorithm of image reconstruction for CT scans starts with an initial estimate of the two-dimensional matrix of attenuation coefficients.

Published March 26, 2025
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In PET scan, a pair of gamma-ray photons are created simulta…

In PET scan, a pair of gamma-ray photons are created simultaneously and always detected at exactly the same time.

Published March 26, 2025
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The gamma-ray photons generated for PET scan are from isomer…

The gamma-ray photons generated for PET scan are from isomeric transition.

Published March 26, 2025
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A sample contains 9879432567 atoms.  If 60 atoms of the samp…

A sample contains 9879432567 atoms.  If 60 atoms of the sample decay in 5 s, what is the radioactivity of the sample?   

Published March 26, 2025
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The notation 68Zn(p,2n)67Ga indicates that Gallium-67 is pro…

The notation 68Zn(p,2n)67Ga indicates that Gallium-67 is produced in a process that a target material zinc-68 is bombarded with a proton and emits two neutrons.

Published March 26, 2025
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The spatial resolution of a nuclear medicine imaging is affe…

The spatial resolution of a nuclear medicine imaging is affected by the geometry of the collimator used.

Published March 26, 2025
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In an isomeric transition, a nucleus releases energy by conv…

In an isomeric transition, a nucleus releases energy by converting a proton into a neutron and emitting a positron.

Published March 26, 2025
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PET scan is more efficient for collecting gamma-ray photons…

PET scan is more efficient for collecting gamma-ray photons in image formation compared with SPECT.

Published March 26, 2025
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