Radiology Final

What specific mechanism of radiation injury may result in the information of hydrogen peroxide when x-ray energy is absorbed by patient tissues?

• An ejected high-speed electron may interact with other atoms within absorbing tissues.

• Free radical formation created by the ionization of water may occur.

• Unequal charge distribution may result in negative electrical potential

• Creation of a magnetic field may cause polarization.

Which of the following is considered a short-term effect of radiation exposure?

• Genetic defects

• Birth abnormalities

• Hair loss

• Cancer

Which of the following are considered to be radioresistant tissue?

• Bone marrow

• Salivary glands

• Lymphoid Tissue

• Intestines

The potential risk of dental radiography inducing a fatal cancer in an individual is about ______the risk of a person developing cancer spontaneously.

• 1/10

• 1/100

• 1/1000

• 1/1,000,000

Risk estimate suggest (1) that death is more likely to occur from common activities than from dental radiographic procedures, and (2) that cancer is much more likely to be unrelated to radiation exposure.

• Both statements are true

• Both statements are false

• First True and Second False

• First False and Second True

_______is an example of a patient protection technique used before x-ray exposure.

• Proper film processing

• Proper prescribing of radiographs

• a lead apron

• a thyroid collar

The collimator:

• Is always round

• Restricts the size and shape of the x-ray beam.

• Is a solid piece of aluminum

• Is fitted within the copper stem beneath the molybdenum cup.

Which type of PID would be most effective in reducing patient exposure?

• Conical

• 16-inch round PID

• 8 inch rectangular PID

• 16-inch rectangular PID

On some dental x-ray machines, only the_____can be altered; the other parameters are preset by the manufacturer.

• kilovoltage peak

• exposure time

• PID length

• milliamperage

A film badge:

• Is worn at waist level by the patient.

• Is worn at waist level by the operator.

• Is clipped to the shirt pocket of the operator

• Is clipped to the shirt pocket of the patient.