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B.Sc Radiology Medical Radiation — practice questions

Explore 28 free Medical Radiation questions in B.Sc Radiology Radiography. Open each question or exercise to read its content, reference answers and available explanation.

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Medical Radiation questions and exercises with answers

Showing questions 1–28 of 28.

A compound is tagged with a radioactive atom and given to a patient so it can be tracked. Such a compound is a:Read the answer and worked solution →The workhorse isotope that can be attached to many compounds to image the skeleton, heart, lungs and kidneys is:Read the answer and worked solution →An early imaging device that maps where nuclear activity has concentrated in the body is the Anger camera, also called the:Read the answer and worked solution →A scanner rotates detectors around the patient in the same geometry as a CT machine, but images a radiopharmaceutical instead. That technique is:Read the answer and worked solution →Both SPECT and PET take nuclear activity inside the patient and build images that are:Read the answer and worked solution →An isotope that gathers wherever cells are growing fast, marking tumours and infection sites, is:Read the answer and worked solution →Radiation dose in SI units is measured in grays. A gray records the energy absorbed divided by the:Read the answer and worked solution →Alongside that SI unit, an older unit is still in everyday use for dose. It is the:Read the answer and worked solution →Equal doses of alpha and gamma radiation do not do equal damage. The factor that captures this difference is the:Read the answer and worked solution →Multiplying the dose in rads by that factor gives a unit closer to real biological effect, called the:Read the answer and worked solution →The SI equivalent of that biological dose unit is the:Read the answer and worked solution →A radiographer stands behind a lead screen. The screen protects her because shielding:Read the answer and worked solution →At the cellular level, the harm from ionizing radiation comes chiefly from breaks and changes in:Read the answer and worked solution →Those instructions carried in the double helix are known as the:Read the answer and worked solution →Safety rules assume that even very small doses carry proportionate risk. That assumption is the:Read the answer and worked solution →Today the deliberate use of large radiation doses to treat disease is almost entirely aimed at:Read the answer and worked solution →Treating food with ionizing radiation to kill spoilage organisms is called food:Read the answer and worked solution →Everyone receives some dose each year from natural and artificial sources. That everyday exposure is called:Read the answer and worked solution →A precision laboratory method using a radioactive isotope to measure tiny amounts of a substance is:Read the answer and worked solution →A radiopharmaceutical is sent to the most active bone cells so a scan can reveal cancerous tumours or:Read the answer and worked solution →Catch the imaging methodsRead the answer and worked solution →Pop the dose unitsRead the answer and worked solution →Run the radiation gatesRead the answer and worked solution →Slice the radiation wordsRead the answer and worked solution →Diagnose or treatRead the answer and worked solution →Sort the radiation wordsRead the answer and worked solution →Type the numberRead the answer and worked solution →Radiation bingoRead the answer and worked solution →

Worked practice questions

A compound is tagged with a radioactive atom and given to a patient so it can be tracked. Such a compound is a:

  1. Radiopharmaceutical
  2. Radiotelescope unit
  3. Radiator component
  4. Radial instrument
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Correct answer: A. Radiopharmaceutical

1. The compound behaves chemically as the body expects. 2. The tag lets a detector follow where the body sends it. 3. A tagged compound used this way is a radiopharmaceutical. _Source: OpenStax College Physics 2e, Chapter 32, Medical Applications of Nuclear Physics._

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The workhorse isotope that can be attached to many compounds to image the skeleton, heart, lungs and kidneys is:

  1. Uranium isotope
  2. Technetium-99m
  3. Carbon isotope
  4. Radon isotope
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Correct answer: B. Technetium-99m

1. It has to bind to many different carrier molecules. 2. It also has to clear the body quickly so the dose stays small. 3. The isotope that does both jobs is technetium-99m. _Source: OpenStax College Physics 2e, Chapter 32, Medical Applications of Nuclear Physics._

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An early imaging device that maps where nuclear activity has concentrated in the body is the Anger camera, also called the:

  1. Gauge camera
  2. Gamma camera
  3. Gravity camera
  4. Grating camera
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Correct answer: B. Gamma camera

1. The isotope emits gamma rays as it decays. 2. The camera collects those rays to build the picture. 3. It is the gamma camera. _Source: OpenStax College Physics 2e, Chapter 32, Medical Applications of Nuclear Physics._

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Medical ImagingPhysicsRadiography