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201 Final

QuestionAnswer
When a fluoroscopic image is electronically amplified by the use of an image intensification system, which of the following benefits results? 1. Increased image brightness 2. Saving of time for the radiologist 3. Patient dose reduction All of the options
When using digital fluoroscopy systems, making use of the last image hold feature can be an effective dose reduction technique.
Luminance is determined by measuring the concentration of light over a particular field of view.
Total filtration of _______________________ for fixed x-ray units operating above 70 kVp is the regulatory standard. 2.5-mm aluminum equivalent
Digital radiography images can be accessed at several workstations at the same time, thus making image viewing very convenient for physicians providing patient care.
Specific area shielding may be selectively used during some x-ray procedures to protect which of the following? All of the options
According to the U.S. Public Health Service, the genetically significant dose (GSD) for the population of the United States is approximately 0.20 mSv.
Which of the following must always be the first step in protection of the reproductive organs? Adequate and precise collimation of the radiographic beam to include only the anatomy of interest
Reducing the field size to the anatomic features of interest not only reduces patient exposure but also increases completed image quality by decreasing scatter.
Which of the following are reasons for unacceptable images? 1. Patient mispositioning 2. Incorrect centering of the radiographic beam 3. Patient motion during the radiographic exposure 4. Incorrect collimation of the radiographic beam All of the options
Which of the following adjustments in technical exposure factors decreases the production of scattered radiation during routine radiographic procedures? Increase kVp and decrease mAs in compensation
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? 0.25-mm thickness of lead
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 ______________. comparable to; routine fluoroscopy.
To ensure that the lifetime risk of occupationally exposed persons remains acceptable, an additional recommendation is that the lifetime effective dose in mSv should not exceed 10 times the occupationally exposed person’s age in years.
exposure of the radiographer can be kept ALARA through individual monitoring and measures and the use of devices. because exposure from radiation jobs will not alter the ________, radiation workers may receive a larger equivalent dose. genetically significant dose
Created by: cathrvn
 

 



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