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Nuclear Medicine Exam Questions and Answers 100% Pass Nuclides with the same atomic number but different numbers of neutrons are called? - ANSWER-Isotopes Two nuclides with the same atomic numbers are called? - ANSWER-Isobars Two nuclides with the same number of neutrons but different atomic n...

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  • November 11, 2024
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  • 2024/2025
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Nuclear Medicine Exam Questions and
Answers 100% Pass

Nuclides with the same atomic number but different numbers of neutrons are called? -

ANSWER✔✔-Isotopes


Two nuclides with the same atomic numbers are called? - ANSWER✔✔-Isobars


Two nuclides with the same number of neutrons but different atomic numbers are

called? - ANSWER✔✔-Isotones


What is a radionuclide? - ANSWER✔✔-A nuclide that emits particular or photon

energy to achieve a more stable energy state


Another name for a helium ion containing two protons and two neutrons is? -

ANSWER✔✔-an alpha particle


What is a beta particle? - ANSWER✔✔-An electron


Why are alpha particles and beta particles not used for imaging? - ANSWER✔✔-They

do not exit the body efficiently and thus are not detected


What ratio of protons to neutrons favors beta decay? - ANSWER✔✔-A low proton-to-

neutron ratio, as compared with stable nuclei

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What two particles are emitted from the nucleus during beta decay? - ANSWER✔✔-A

beta particle (electron) and an antineutrino


What is the relationship between the mean energy of beta spectrum? - ANSWER✔✔-

The mean energy is approximately one third of the maximum energy


What ratio of protons to neutrons favors positron decay? - ANSWER✔✔-A high proton-

to-neutron ratio


What particles are released from the nucleus during positron decay? - ANSWER✔✔-A

positron (antielectron) and Neutrino


What is the minimum amount of nuclear energy required for positron decay? -

ANSWER✔✔-1.02MeV


What is the fate of a positron? - ANSWER✔✔-To travel a short distance, combine with

an electron, and be annihilated


When a positron is annihilated via combination with an electron, the result is the

production of? - ANSWER✔✔-Two nearly opposed 511 keV photons


What ratio of protons to neutrons favors electron capture decay? - ANSWER✔✔-A high

proton-to-neutron ratio


What particle is released from the nucleus during electron capture decay? -

ANSWER✔✔-A neutrino



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What is released from the nucleus during isometric transition? - ANSWER✔✔-Gama

rays


Other than wavelength, frequency, and energy intensity, the fundamental difference

between X-rays and gamma rays is? - ANSWER✔✔-that x-rays are produced from

energy released due to changes in the quantum levels/values of orbital electrons of an

atom, while gamma rays are produced from energy shifts in the nucleus


When energy from a nuclear transition results in the emission of an orbital electron

rather than a gamma ray, this process is called? - ANSWER✔✔-internal conversion


Internal conversion electrons increase the radiation dose to the patient because? -

ANSWER✔✔-Energy from the electron is absorbed within the patients body


When energy from an orbital transition results in the emission of an orbital electron

rather than an X-ray, the electron is called? - ANSWER✔✔-An Auger electron


What does the term "Metastable" mean? - ANSWER✔✔-When an isomeric state is long-

lived longer


After an electron is ejected from an inner shell orbital. what occurs? - ANSWER✔✔-

Outer shell electrons release energy by moving to now unoccupied, less energic inner

orbitals; the energy released by this transition is termed "characteristic of x-ray

radiation"




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What are the two methods used to create synthetically radioactive materials? -

ANSWER✔✔-Radioactive materials are produced by bombarding a target material with

either ions or with neutrons


A_______ us used to bombard elements with neutrons - ANSWER✔✔-nuclear reactor


An______is used to bombard elements with protons - ANSWER✔✔-accelerator (linear

or cyclotron)


Name the 5 common cyclotron produced radionuclides used in nuclear medicine -

ANSWER✔✔-In111, I123, Ga67, F18 an Tl201


What is a carrier free radioisotope? - ANSWER✔✔-A radioisotope that does not contain

any nonradioactive species


What does the term "activity" mean? - ANSWER✔✔-The rate of disintegration of a

radionuclide


The unit of radioactivty equal to 3.7 x 10^10 disintergrations per second called? -

ANSWER✔✔-The curie (Ci)


What is a becquerel (Bq)? - ANSWER✔✔-The derived unit of radioactivity used by

modern metric system the SI is called the becquerel. One becquerel is equal to one

disintegration per second or 2.7027x10^-11 Ci


A 1 millicurie dose of radiopharmaceutical is equal to how many becquerels? -

ANSWER✔✔-37 million (37MBq)
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