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Final Exam
Imaging Equipment
| Question | Answer |
|---|---|
| An image intensifier tube is identified by the diameter of its __________________. | input phosphor |
| The ability of the eye to detect differences in brightness levels is termed ___________. | contrast perception |
| Image intensified fluoroscopy is performed at illumination levels similar to ________. | radiographic viewing |
| The ratio of x-rays incident on the input phosphor to light photons exiting the output phosphor is called _______ gain. | flux |
| The image intensifier improved fluoroscopy by increasing image _________________. | brightness |
| X-rays that exit the patient and enter the image intensifier first interact with the _____. | input phosphor |
| The capability of an image intensifier to increase the illumination level of the image is called its _____________________. | brightness gain |
| The input phosphor converts _________ to _________. | x-rays and light |
| Fluoroscopy was developed so that radiologists could view ______________ images. | dynamic |
| The ____________ in the image intensifier emits electrons when it is stimulated by light photons. | photocathode |
| The new development in the fourth-generation CT scanner is the ________________ | stationary detector assembly |
| The patient dose in CT is determined by the ________________ collimator. | prepatient |
| Many CT x-ray tubes have the capacity for millions of _________ with each exam. | heat units |
| The second-generation CT scanners had the disadvantage of increased ____________. | beam scatter |
| CT scanners operate on ________________ voltage generation. | high frequency |
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ashleymarshall