Detector Efficiency Is Defined as
A)the Ratio of the Number $\mu$

question 33

Multiple Choice

Detector efficiency is defined as

• A)the ratio of the number of detected events to the number of source emissions.
• B)the geometric efficiency and is defined as the fraction of emitted photons (gamma or x-rays) that hit the detector; it depends on the detector configuration and its distance from the source.
• C)the fraction of gamma rays that are detected when they hit the detector; it depends on the thickness (t) and attenuation coefficient (\(\mu\)) of the detecting material.
• D)the amount of blurring that is produced by an imaging system, characterized by point spread function and line spread function.

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Definitions:

Existence

The state or fact of having objective reality or being, encompassing all entities, events, or phenomena that are considered real or conceivable.

Substance

In the context of health and psychology, often refers to psychoactive drugs that can affect mental processes and that may be subject to abuse.

Self-Concept

An individual's perception of self, encompassing beliefs, feelings, and thoughts about one's identity and abilities.

Preoperational Stage

The second stage in Piaget's theory of cognitive development, occurring roughly between the ages of 2 and 7, characterized by symbolic thinking, egocentrism, and a lack of logical reasoning.