General Radiation
Infection Prevention and Control
Purpose and Technique
Terminology
Radiation Characteristics and Protection
100

This factor primarily controls the quantity (number) of x-rays produced.

What is mA?

100

Hand hygiene should be performed before and after this radiographic procedure step.

What is patient contact?

100

This technique requires the image receptor to be placed parallel to the long axis of the tooth.

What is the paralleling technique?

100

The unsharp edge surrounding an image caused by increased focal spot size.

What is penumbra?

100

This principle means radiation exposure should be kept as low as reasonably possible.

What is ALARA?

200

This term refers to the penetrating power of an x-ray beam.

What is quality?

200

Digital sensors are classified as this type of patient-care item.

What is semi-critical?

200

This technique uses an imaginary bisector to determine vertical angulation.

What is the bisecting angle technique?  

200

This refers to the overall blackness or darkness of a radiographic image.

What is density?

200

The recommended operator position during exposure is at least this distance from the tubehead.

What is 6 feet?

300

This error occurs when the x-ray beam fails to cover the entire image receptor.

What is a cone cut?

300

This organization sets infection control guidelines for dental radiography.

What is the CDC?

300

This device helps ensure accurate beam alignment when using the paralleling technique.

What is an XCP (beam alignment device)?

300

The ability of a radiograph to display subtle differences between structures.

What is contrast?

300

Radiation that is deflected after interacting with matter is called __________ radiation.

What is scatter radiation?

400

This imaging method produces three-dimensional views and is often used for implant planning.

What is CBCT?

400

These precautions are used for every patient, regardless of diagnosis.

What are standard precautions?

400

Incorrect vertical angulation can result in this image error, where teeth appear too long.

What is elongation?

400

This law explains how radiation intensity decreases as distance increases.

What is the inverse square law?

400

The unit used to measure equivalent dose and biological risk is the __________.

What is the sievert (Sv)?

500

A radiopaque object appearing on an image due to failure to remove jewelry is called a(n) __________.

What is an artifact?

500

The CDC recommends following this document when processing radiographic equipment.

What are the manufacturer’s instructions for use (IFU)?

500

Overlapping contacts on an image are usually caused by improper __________ angulation.

What is horizontal angulation?

500

When teeth appear too short on a radiograph, the image is described as __________.

What is foreshortening?

500

This protective device reduces patient exposure by limiting the size of the x-ray beam.

What is collimation?

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