Chapter 15: Management of Imaging Personnel Radiation

Because the workforce in radiation-related jobs is small compared with the population as a whole. the amount of radiation received by this workforce can be larger than the amount received by the general public without altering the

GSD

Which of the following is a tenet of the ALARA concept?

The radiographer’s exposure should be kept as low as reasonably achievable

The facility that employs a pregnant diagnostic imaging staff member should provide that individual with an additional monitor to be worn at waist level during all radiation procedures. The purpose of this additional monitor is to ensure that the monthly EgD to the embryo-fetus does not exceed BLANK in metric units

0.5 mSv

Which of the following are radiation sources that can be generated in a diagnostic x-ray room?

1. Primary radiation

2. Scatter radiation

3. Leakage radiation

1, 2 and 3

During C-arm fluoroscopy, the exposure rate cause by scatter near the entrance surface of the patient (the x-ray tube side) BLANK the exposure rate caused by scatter near the exit surface of the patient

Exceeds

For high-level control interventional procedures, the radiographer should verify that which of the following dose reduction features are available and in good working order?

1. High-quality, low-dose fluoroscopy mode and pulsed beam operation

2. Manual collimation, correct beam filtration, and removable grids

3. Roadmapping, time-interval differences, and last-image-hold mode

1, 2 and 3

In diagnostic radiology, which of the following radiation sources poses the most significant occupational hazard for the radiographer?

Scattered radiation

During a fluoroscopic examination, which of the following methods and devices reduce(s) the radiographer’s exposure?

1. Adequate x-ray beam collimation

2. Control of technical exposure factors

3. Use of a cumulative timing device

1, 2 and 3

If the peak energy of the diagnostic x-ray beam is 120 kVp, the primary protective barrier in a typical installation consists of at least BLANK and extends BLANK upward from the floor of the x-ray room, when the tube is 1.5 to 2.1 from the wall in question

1.6 mm lead, 2.1 m

Of the following radiation sources, which is the control booth barrier not intended to intercept in a diagnostic x-ray room?

1. Leakage radiation

2. Primary radiation

3. Scattered radiation

2 only

Which of the following statements is true?

Radiographers and non occupationally exposed individuals should never stand in the useful beam to restrain a patient during a radiographic procedure

Of the devices listed here, which eliminates non-useful low-energy photons from the primary beam?

1. Collimator light source

2. Electronic sensors

3. Aluminum filtration

3 only

Which of the following is the most effective means of protection from ionizing radiation normally available to the radiographer?

Placing as much distance as possible between oneself and the source of radiation

The lead glass window of the control booth barrier in a stationary radiographic installation typically consists of which of the following?

1.5 mm lead equivalent

The beam direction factor is also known as the

Use factor

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

It decreases by a factor of 16 at the new distance

Leakage radiation and scatter radiation are forms of

Secondary radiation

Diagnostic x-ray installations must be equipped with

Radiation absorbent barriers

Which of the following principles can be used to minimize occupational radiation exposure?

1. Time

2. Distance

3. Shielding

1, 2 and 3

Pregnant radiographers can wear an additional monitoring device at waist level to ensure that the monthly EgD does not exceed

0.5 mSv

During fluoroscopy, which of the following will provide radiation protection for the radiographer and the radiologist

1. Using appropriate source to skin distance

2. Having a diagnostic type x-ray tube housing

3. Using a remote control fluoroscopic system

1, 2 and 3

Floors of radiation rooms except dental installations, doors, walls, and ceilings of radiation rooms exposed routinely to the primary beam are given a use factor of

1

If a radiographer moves closer to a source of radiation, the radiation exposure to the radiographer

Increases significantly