Personnel Protection

Question 1

A protective curtain, or sliding panel, with a minimum 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?

Answer 1

Scattered radiation above the tabletop

Question 2

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

Answer 2

comparable to; routine fluoroscopy.

Question 3

For primary radiation, what is the term that represents a portion of beam-on time that the x-ray beam is directed at a primary barrier during the week?

Answer 3

Use factor

Question 4

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?

Answer 4

0.25-mm thickness of lead

Question 5

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.

Answer 5

1 mSv; 5 mSv

Question 6

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

Answer 6

1 mSv.

Question 7

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

Answer 7

She continues to perform her duties without interruption of employment, provided that she has received radiation safety counseling and follows established radiation safety practices.

Question 8

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.

Answer 8

0.8

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 ____________________.

Answer 9

scatter a minimum of 2 times before reaching any area behind the control-booth barrier.

Question 10

Who should determine the exact shielding requirements for a particular imaging facility?

Answer 10

Medical physicist