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Radiation Protection Test Bank
Questions Chapter 10 & 11 with well
elaborated answers 2025-2026.
What term involves a random effect of ionizing radiation
Stochastic event
Upper boundary radiation exposure limits for occupational exposed persons are associated with risks that are similar to those encountered by employees in other industries that are generally considered to be reasonably safe. These industries include
I. Manufacturing
II. Trade
III. Government
All of them
What agency was previously known as the atomic energy commission
NRC
What are the functions and responsibilities of the US occupational safety and health administration (OSHA)
Function as a monitoring agency in places of employment, predominantly in the industry
regulates occupational exposure to radiation through part 1910 of title 29 of the US code of federal regulations
responsible for regulations concerning an employee's "right to know" with regard to hazards in the workplace
What group is run by the government of japan, primarily to study Japanese atomic bomb survivors?
Radiation effects research foundation
Determine the cumulative effective dose limit to the whole body dose of an occupational exposed person who is 46 years old
460 mSv
The main function of the nuclear regulatory commission (NRC) is to
- Inspect imaging facilities
- Oversee the nuclear energy industry
- Regulate imaging facilities
2 only
The effective dose limiting system supersedes
The maximum permissible dose system (MPD)
The ALARA concept adopts an extremely conservative. Model with respect to the relationship between
The cumulative effective dose limit does NOT include
- Exposure acquired as a consequence of a radiation worker undergoing medical imaging procedures
- Radiation exposure from natural background radiation
- Radiation exposure received while radiographers perform imaging procedures on patients
1 and 2 only
Occasional exposure for the purpose of education ain't raining is permitted, provided that special care is taken to ensure that the annual effective dose limit of _____ is not exceeded for persons undergoing the age of 18 years
1 mSv annually
The effective dose limit for the lens of the eye for the public is
15 mSv
A radiation safety officer in a health care facility must hav sufficient authority, organizational freedoms, and management prerogative to
- Identify radiation safety problems
- Initiate, recommend or provide corrective actions
- Stop unsafe operations involving by-product material
- Verify implementation of corrective actions
1, 2, 3, and 4
Working in conjunction with their partner in other agencies, the FDA intends to take action to
- Promote safe use of medical imaging devices
- Support informed clinical decision
- Increase patient awareness
1, 2, and 3
Effective dose limits may be specified for
- Whole-body exposure
- Partial-body exposure
- Exposure of individual organs
1, 2, and 3
What is NOT an x-ray beam limitation device
Filter
The protective tube housing serves as a shield against _____________________ entering the x-ray tube, thereby preventing electric shock while also facilitating cooling of the x-ray tube.
The high voltage
If the luminance of the collimator light source is adequate the localizing light beams will satisfactorily outline the margins of the radiographic beam on the are of clinical interest on
All patients
When a fluoroscopic image is electronically amplified by the use of an image intensification system, which of the following benefits results?
- Increased image brightness
- Saving of time for the radiologist
- Patient dose reduction
1, 2 and 3
Current federal standard limit entrance skin exposure rates of general-purpose intensified fluoroscopic units with maximum technique factors engaged to a maximum of ______ as measured at tabletop, with the image intensifier entrance surface at a prescribed 30 cm above the tabletop
100 mGya/min
During a fluoro exam, a resettable cumulative timing device measures the x-ray beam on time and sounds an audible alarm or in some cases temporarily interrupts the exposure after the fluoroscope has been activated for what length of time
5 minutes
To visualize smaller and lower-contrast objects during interventional procedures, high-level-control fluoroscopy uses exposure rates that are _______ those normally used in routine fluoroscopy.
Higher than
When obtaining a dorsoplantar projection of a foot, which of the following types of filter should be used to provide a greater uniform density of anatomy
Wedge filter
Digital radiography systems offer several and tangles over computed radiography some of these include:
- Lower doe
- Ease of use
- Immediate imaging results
- Manipulation of the image
All of them
Total filtration of _________ for a fixed x-ray units operating above 70 kVp is the regulatory standard
2.5 mm aluminum eq
In digital radiography the number of different shades of gray that can be stores in memory and displayed on a computer monitor is termed
Grayscale
When an exposed computer radiography imaging plate is ready to be processed, an imaging reading unit is used to scan the photostimulable phosphor imaging plate with a helium-neon laser beam. This process results in the emission of violet light that is changed into an electron signal by a device called
Photomultiplier tube
Which procedures involve extended fluoroscopic time
Biliary drainage
