Question 1

The maximum weekly permitted equivalent dose for a controlled area must not exceed:

Accepted Answer

The maximum weekly permitted equivalent dose for a controlled area is 1 millisievert, which aligns with the annual dose limit of 50 millisieverts for occupational exposure, divided by 50 working weeks.

Question 2

During which of the following x-ray examinations should a radiographer always wear a thyroid shield?

Accepted Answer

Fluoroscopy and special procedures involve prolonged exposure to radiation and a higher dose to the thyroid gland. Therefore, wearing a thyroid shield is recommended to reduce the risk of radiation exposure to the thyroid gland. For routine mobile radiographic procedures, general diagnostic radiographic procedures, and digital radiography procedures, wearing a thyroid shield may not be necessary unless the radiographer feels it is necessary for their own comfort and protection.

Question 3

What is the term for the proportional amount of time during which the x-ray beam is energized or directed toward a particular barrier?

Accepted Answer

The term for the proportional amount of time during which the x-ray beam is energized or directed toward a particular barrier is called the use factor. The occupancy factor relates to the number of individuals occupying a space, the workload factor relates to the amount of work being performed, and the distance factor relates to the inverse square law and the distance between the source of radiation and the barrier.

Question 4

Which of the following is another term for use factor (U)?

Accepted Answer

The answer of Which of the following is another term...

Question 5

When a radiologic technologist declares her pregnancy to her employer,which of the following is appropriate?

Accepted Answer

The best choice is D as it allows the radiologic technologist to continue her employment without interruption as long as she has received radiation safety counseling and follows established radiation safety practices. It is important for pregnant radiologic technologists to take necessary precautions to minimize their exposure to ionizing radiation, but termination or a leave of absence may not be necessary if proper safety measures are taken.

Question 6

When doors to radiographic and fluoroscopic rooms are closed during radiation exposures,a substantial degree of protection is provided for persons in areas adjacent to the room door.This is because in most facilities room doors have attenuation for diagnostic energy x-ray equivalent to that provided by _______ mm of lead.

Accepted Answer

The answer of When doors to radiographic and fluoroscopic rooms...

Question 7

When the time spent in a higher radiation area is reduced or limited,occupational exposure:

Accepted Answer

When the time spent in a higher radiation area is reduced or limited, the overall radiation exposure to the worker is also reduced. Therefore, occupational exposure is also reduced.

Question 8

Which of the following adjustments in technical exposure factors decreases the production of scattered radiation?

Accepted Answer

The answer of Which of the following adjustments in technical...

Question 9

While standing behind the control-booth barrier,a radiographer makes a radiographic exposure.The x-rays scattered from the patient's body should ____________________.

Accepted Answer

The answer of While standing behind the control-booth barrier,a radiographer...

Question 10

Whenever scattered radiation decreases,the radiographer's exposure:

Accepted Answer

The decrease in scattered radiation would indicate that less radiation is being scattered and therefore less is reaching the radiographer, resulting in a decrease in the radiographer's exposure.

Question 11

For C-arm devices with similar fields of view,the dose rate to personnel located within a meter of the patient is:

Accepted Answer

C-arm devices with similar fields of view typically have dose rates to personnel located within a meter of the patient that are comparable to that of routine fluoroscopy.

Question 12

In terms of occupational risk,radiography may be compared with the occupational risk associated with which of the following?

Accepted Answer

Radiography is generally considered a safe occupation compared to extremely hazardous industries or a nuclear war. However, it still carries some occupational risks associated with prolonged exposure to radiation. It can be compared to other industries that are considered reasonably safe, such as government and trade. A radiation accident like the Chernobyl disaster is an extreme scenario and not typically associated with occupational risk in radiography.

Question 13

Diagnostic imaging personnel receive the highest occupational exposure during which of the following procedures?
1)Fluoroscopy
2)Mobile radiography
3)Special procedures

Accepted Answer

The answer of Diagnostic imaging personnel receive the highest occupational...

Question 14

The annual effective dose limit for individual members of the general population not occupationally exposed is ___________ for continuous or frequent exposures from artificial sources other than medical irradiation and natural background and ____________ for infrequent annual exposure.

Accepted Answer

The annual effective dose limit for individual members of the general population not occupationally exposed is 1 mSv for continuous or frequent exposures from artificial sources other than medical irradiation and natural background and 5 mSv for infrequent annual exposure. This is stated in the International Commission on Radiological Protection (ICRP) publication 103.

Question 15

If the intensity of the x-ray beam is inversely proportional to the square of the distance from the source,how does the intensity of the x-ray beam change when the distance from the source of radiation and a measurement point is tripled?

Accepted Answer

According to the inverse square law, the intensity of the x-ray beam is inversely proportional to the square of the distance from the source. When the distance is tripled, it becomes 9 times greater than the original distance (3 squared). Therefore, the intensity of the x-ray beam will decrease by a factor of 9 at the new distance.

Question 16

Which part(s) of a diagnostic x-ray unit should a radiographer avoid touching while a radiographic exposure is in progress?

Accepted Answer

The tube housing, collimator, and high-tension cables should be avoided during exposure due to the risk of electrical shock and radiation exposure.

Question 17

Because occupational exposure of the radiographer can be kept as low as reasonably achievable (ALARA) through individual monitoring and other protective measures and the use of protective devices and because exposure from radiation-related jobs will not alter the ______________________,radiation workers may receive a larger equivalent dose than members of the general population.

Accepted Answer

The "genetically significant dose" (GSD) refers to the radiation dose received by the reproductive organs, which can potentially affect future generations. The statement is saying that radiation workers can receive a higher GSD than members of the general population without significantly altering this risk to future generations, due to the protective measures in place. Therefore, B is the best choice. Mean glandular dose, bone marrow dose, and tissue tolerance dose are not directly relevant to this statement.

Question 18

If the peak energy of the x-ray beam is 100 kVp,a protective lead apron must be the equivalent to at least which of the following measures?

Accepted Answer

The answer of If the peak energy of the x-ray...

Question 19

A spot film device protective curtain,or sliding panel,of a minimum thickness of 0.25-mm lead equivalent should normally be positioned between the fluoroscopist and the patient to intercept which of the following types of radiation?

Accepted Answer

The protective curtain or sliding panel is designed to intercept scattered radiation above the tabletop. The primary radiation is the useful beam that passes directly from the x-ray tube toward the patient. Exit or image formation radiation is the radiation that has passed through the patient and has been attenuated to form the image on the image receptor. Direct radiation is not a term used in medical imaging. Therefore, the correct answer is B.

Question 20

Which of the following x-ray procedures increases the radiographer's risk of exposure to ionizing radiation?
1)Mobile C-arm fluoroscopy
2)Interventional procedures that use high-level-control fluoroscopy
3)Mobile radiographic examinations

Accepted Answer

All of the listed procedures increase the radiographer's risk of exposure to ionizing radiation.

Quiz 13: Management of Imaging Personnel Radiation Dose During Diagnostic X-Ray Procedures