SOFTWARE PROJECT MANAGEMENT
QUALITY MANAGEMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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to determine constancy and linearity of radiation output
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to determine the dose receive by patient
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Either A or B
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None of the above
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Detailed explanation-1: -As defined by Venes & Taber (2005), “linearity in radiography is the production of a constant amount of radiation for different combinations of milliamperage and exposure time”. In the clinical setting, it is essential that all general x-ray units produce a proportional change in exposure as milliamperage (mA) varies.
Detailed explanation-2: -The mAs linearity test was done to assess the consistency of tube current at the same mAs. Measurement of focal spot size was performed initially during the acceptance test and then occasionally as part of image quality control.
Detailed explanation-3: -Nuclear Regulatory Commission (NRC) guidelines state that dose calibrators must be tested for linearity upon installation and quarterly thereafter over a range of activities from 10 J, Ci (370 kBq) to the highest dose administered to the patient (300 mCi [11.1 GBq] ofiodine-131 for therapy at our institution).