In Positron Emission Tomography PET) Scans, a Very Small Amount

question 55

Multiple Choice

In positron emission tomography PET) scans, a very small amount of a radioactive drug is given to a patient. Fluorine-18 doped or labeled fluorodeoxyglucose, also called FDG, is a radioactive version of the sugar glucose with a half-life of 110 minutes. Once injected into the body, it will go to places where glucose is used for energy. For example, FDG will go to the brain, and, in particular, to those parts of the brain that are actively burning glucose for energy. A variety of different images are observed depending on the parts of the brain being used in certain tasks, such as reading or listening. If the patient came back at the same time the next day after their initial injection for a further scan, how much of the original fluorine-18 decay rate would remain?

• A) zero
• B) 1.15 × 10^-2 %
• C) 3.53 × 10^-2 %
• D) 5.41 × 10^-2 %
• E) 5.41 × 10^-4 %

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Definitions:

Descriptive Statistic

A brief summary statistic that quantitatively describes or summarizes features from a collection of information.

Data Set

A collection of data, often presented in tabular form, where each row represents a different individual or entity and each column represents a particular variable or attribute.

Population Subset

A smaller group selected from a larger population, used in statistical analysis to draw conclusions or make inferences about the greater population.

Inferential Statistics

A branch of statistics that allows us to make predictions or inferences about a population based on a sample of data.