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What is the range of physical half-lives of radionuclides?

From minutes to hours

From fractions of a second to millennia (correct)

From years to decades

From hours to days

What is the primary reason for the concentration of a radiopharmaceutical in a specific tissue or organ?

The biological half-life of the pharmaceutical

The metabolic properties of the pharmaceutical (correct)

The physical half-life of the radionuclide

The chemical properties of the radionuclide

What is the process by which a pharmaceutical is eliminated from the tissue, organ, and whole body?

Radioactive decay

Metabolic processes of turnover and excretion (correct)

Chemical reactions

Biological half-life

What is the term for the time it takes for a pharmaceutical to be eliminated from the body?

Biological half-life Signup and view all the answers

What is a radiopharmaceutical?

A pharmaceutical that has been labelled with a radionuclide Signup and view all the answers

What is the purpose of a radionuclide in medical imaging?

To provide a source of radiation for imaging Signup and view all the answers

What is the term for the half-life of a radionuclide in a specific tissue or organ?

Effective half-life Signup and view all the answers

What determines the physical half-life of a radionuclide?

The radioactive properties of the radionuclide Signup and view all the answers

What is the unit of measurement for the rate of disintegration of a radioactive sample?

Becquerel (Bq) Signup and view all the answers

What is the relationship between the count rate and the activity of a radioactive sample?

Count rate is directly proportional to the activity Signup and view all the answers

What is the fundamental law of radioactive decay?

The activity of a radioactive sample decreases by equal fractions in equal interval time Signup and view all the answers

What is the half-life of a radionuclide?

The time taken for the activity to decay to half of its original value Signup and view all the answers

What is the unit of measurement for radionuclide administrations in medical gamma imaging?

Megabecquerel (MBq) Signup and view all the answers

What is the relationship between the count rate and the number of radioactive atoms in a sample?

Count rate is directly proportional to the number of radioactive atoms Signup and view all the answers

What is the unit of measurement for the activity of radionuclide generators?

Gigabecquerel (GBq) Signup and view all the answers

What is the minimum value that the activity of a radioactive sample can reach?

Non-zero, but approaching zero Signup and view all the answers

What percentage of radionuclide imaging uses Technetium-99m?

90% Signup and view all the answers

What is the primary advantage of using Technetium-99m with its longer-lived parent in a generator?

Reduced decay during transport and storage Signup and view all the answers

What is the half-life of the parent 99Mo used in the Technetium generator?

67 hours Signup and view all the answers

What is the primary reason a reasonably large activity of Technetium-99m can be administered?

Its pure gamma emission Signup and view all the answers

What is the material used to shield the Technetium generator?

Lead Signup and view all the answers

What is the purpose of the exchange column of alumina beads in the Technetium generator?

To absorb the parent 99Mo Signup and view all the answers

What is the energy of the gamma emission of Technetium-99m?

141 keV Signup and view all the answers

What happens to the activity of the daughter 99mTc when the generator is delivered?

It has built up to its maximum Signup and view all the answers

What is the primary mode of decay of Gallium-67 and Indium-111?

Electron capture Signup and view all the answers

Which radionuclide is used to detect tumours and abscesses?

Gallium-67 Signup and view all the answers

What is the half-life of Indium-113?

100 minutes Signup and view all the answers

What is the primary use of 18F in PET scans?

Brain and heart metabolism as well as epilepsy and tumour detection Signup and view all the answers

Which of the following radionuclides has the shortest half-life?

Rubidium-82 Signup and view all the answers

What is the primary purpose of positron emitters in medical imaging?

To perform PET scans Signup and view all the answers

Which radionuclide is used to label white blood cells and platelets?

Indium-111 Signup and view all the answers

What is the energy of the gamma rays emitted by Indium-113?

390 keV Signup and view all the answers

What is the primary advantage of using Indium-113 over Indium-111?

Higher energy gamma rays Signup and view all the answers

What is the half-life of Rubidium-81?

4.7 hours Signup and view all the answers

What is emitted from the nucleus with high energy during β+ decay?

A positive electron (positron) Signup and view all the answers

What is the result of a neutron deficit in a radionuclide?

β+ decay or K-electron capture Signup and view all the answers

What occurs when an extranuclear electron is captured by the nucleus?

The number of neutrons increases relative to the number of protons Signup and view all the answers

What is emitted by the daughter nuclide after K-electron capture?

X-rays Signup and view all the answers

What is unique about the energy of gamma rays emitted during radioactive decay?

They have a specific energy that varies among nuclides Signup and view all the answers

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