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RAD 201 EXAM 3

QuestionAnswer
Luminance is determined by measuring the concentration of light over a particular field of view
Digital radiography systems offer several advantages over computed radiography. Some of these include lower dose, ease of use, immediate imaging results, manipulation of the image
All digital imaging devices are subject to certain artifacts such as aliasing, moirè patterns, contouring.
In digital radiography the number of different shades of gray that can be stored in memory and displayed on a computer monitor is termed grayscale
When generator settings are changed from one mA and time combination to another, the most that linearity can vary is 10%
When using digital fluoroscopy systems, making use of the last image hold feature can be an effective dose reduction technique
What is frequent a problem in diagnostic pediatric radiography? motion
___________ are the sensing devices most often used to measure skin dose directly. Thermoluminescent dosimeters
During a radiographic examination, which of the following combinations of technical exposure factors reduce patient radiation dose? higher kVP, lower mAs
Because multiple bony areas span the entire body, the radiation dose absorbed by the organ called bone marrow cannot be measured by a direct method, it can only be estimated
What procedure results in the lowest radiation effective dose to the patient? dual energy X-ray absorptiometry
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
Reducing the field size to the anatomic features of interest not only reduces patient exposure but also increases completed image quality by decreasing scatter
Studies of groups such as the atomic bomb survivors of Hiroshima have shown that damage to the newborn is unlikely for doses below 0.2 Gy
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
Created by: ashleymarshall
 

 



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