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

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

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

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

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

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

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.

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

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

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