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

question 21

Multiple Choice

Geometric efficiency is defined

• A)as the ratio of the number of detected events to the number of source emissions.
• B)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)as 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)as the amount of blurring that is produced by an imaging system, characterized by point spread function and line spread function.

---

Definitions:

School Grades

Evaluations of a student's performance or achievement in academic subjects, often in the form of letters or numbers.

IQ Scores

Standardized scores derived from intelligence tests, intended to measure a person’s cognitive abilities in relation to their age group.

Labyrinth

A complex system of paths or tunnels in which it is easy to get lost; in anatomy, it refers to the inner ear's intricate structure involved in hearing and balance.

Cochlea

A spiral-shaped cavity of the inner ear that plays a crucial role in the sense of hearing by converting sound waves into nerve impulses.