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rad201 wk 11
| Question | Answer |
|---|---|
| Digital radiography images can be accessed | at several workstations at the same time, thus making image viewing very convenient for physicians providing patient care. |
| The control panel, where technical exposure factors are selected and visually displayed for the equipment operator, must be located | behind a suitable protective barrier that has a radiation-absorbent window that permits observation of the patient during any procedure. |
| What is the purpose of radiographic beam filtration? | To reduce exposure to the patient's skin and superficial tissues by absorbing most of the lower-energy photons from the heterogeneous beam |
| 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 Al Eq |
| Which of the following is frequently a problem in diagnostic pediatric radiography? | patient motion |
| ________________________ are the sensing devices most often used to measure skin dose directly. | TLD |
| A blotchy radiographic image that results when an insufficient quantity of x-ray photons reaches the image receptor is called | quantum mottle or noise |
| Reducing the field size to the anatomic features of interest not only reduces patient exposure but also | increases completed image quality by decreasing scatter. |
| During a radiographic examination, which of the following combinations of technical exposure factors reduce patient radiation dose? | higher kvp, low mas |
| During which of the following x-ray examinations should a radiographer always wear a thyroid shield? | Fluoroscopy and x-ray special procedures |
| Secondary radiation includes | leakage and scatter radiation |
| Compared to general diagnostic radiography performed in an x-ray room, imaging personnel receive the highest occupational exposure during which of the following procedures? | fluoroscopy |
| _______________ is essentially the radiation output weighted time that the unit is actually delivering radiation during the week. | workload |
| Whenever scattered radiation decreases, the radiographer’s exposure | decreases |
Created by:
lindseylaporte