American Registry of Radiologic Technologists (ARRT) Practice Exam

Question: 1 / 400

In which units is the intensity of x-ray beams commonly measured?

Joules

Roentgens

The intensity of x-ray beams is commonly measured in roentgens, which defines the quantity of ionization produced in air by x-rays or gamma rays. This unit is especially relevant in radiologic technology as it relates directly to the exposure levels of x-ray beams and their potential biological effects on patients and personnel. Understanding the measurement of intensity in roentgens is essential for ensuring safe radiologic practices, as it helps technicians assess and control the dose of radiation delivered to patients.

Other units listed, such as joules, watts, and decibels, serve different purposes. Joules measure energy, watts measure power (with respect to time), and decibels measure sound intensity, making them less suitable for the specific context of measuring the intensity of x-ray beams. Hence, roentgens is the appropriate unit of measure for this application within radiologic technology.

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Watts

Decibels

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