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Manpreet's Stack
Final exam RAD 201
| Question | Answer |
|---|---|
| What is USE factor ? | The fraction or percentage of time that the primary radiation beam is directed at a specific structural barrier during X-ray . |
| What is workload? | It is the radiation output weighted time that the unit is actually delivering radiation during the week. |
| ______________________a diagnostic x-ray unit should not be touched while a radiographic exposure is in progress? | Tube housing, collimator, and high-tension cables |
| Whenever scattered radiation decreases, the radiographer’s exposure ______________? | Decreases. |
| ___________________ determine the exact shielding requirements for a particular imaging facility? | Medical physicist |
| What are the sensing devices most often used to measure skin dose directly? | Thermoluminescent dosimeters |
| 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. |
| ______________ is frequently a problem in diagnostic pediatric radiography? | Patient motion |
| Essentially all diagnostic medical procedures result in fetal exposures ______________, so that _______________________? | Of less than 0.01 Gy; the risk of abnormality is very small |
| Reducing the field size to the anatomic features of interest not only reduces patient exposure but also ___________________ ? | increases completed image quality by decreasing scatter. |
| A blotchy radiographic image that results when an insufficient quantity of x-ray photons reaches the image receptor is called ___________? | quantum noise, or mottle. |
| What is a minimal source-skin distance, When performing a mobile radiographic procedure, to reduce the radiation exposure to the patient? | 30 cm. |
| When obtaining a dorsoplantar projection of a foot, ________________ should be used to provide a greater uniform density of the anatomy? | Wedge filter |
| 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 |
| Luminance is determined by measuring the concentration of light ____________ ? | over a particular field of view. |
Created by:
Mann gill
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