Term
| What is the purpose of fluoroscopy? |
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Definition
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Term
| In a stationary fluoroscopy unit, where is the fluoroscopic x-ray tube located? |
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Definition
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Term
| What is the normal tube current during fluoroscopy? |
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Definition
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Term
During fluoroscopy, which of the following is correct?
a. increasing kVp produces a longer scale of contrast
b. increasing mA lowers patient dose
c. increasing spot filming lowers patient dose |
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Definition
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Term
| What conversion occurs in the image at the input phosphor of an image intensifier tube? |
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Definition
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Term
| What conversion occurs in the iamge at the photocathode of the image intensifier tube? |
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Definition
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Term
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Definition
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Term
| What conversion occurs in the image at the output phosphor of an image intesifier tube? |
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Definition
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Term
| At what stage of image intensified fluoroscopy is the number of photons lowest? |
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Definition
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Term
Of the following, what comes first in image intensifying?
a. photocathode
b. electrostatic focusing lenses
c. cesium iodide screen
e. zinc cadmium sulfide screen |
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Definition
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Term
Of the following, what comes last in image intensifying?
a. photocathode
b. electrostatic focusing lenses
c. cesium iodide screen
e. zinc cadmium sulfide screen |
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Definition
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Term
| What are the functions of the electrostatic lenses in an image intensification tube? |
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Definition
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Term
| What is the process called when an image intensifier tube makes a dim image brighter? |
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Definition
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Term
| How is the image intensifier's input phosphor different from the output phosphor? |
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Definition
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Term
| What maintains the image brightness in a fluoroscopic system? |
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Definition
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Term
| Automatic brightness control (ABC) is designed to compensate for what? |
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Definition
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Term
| The flux gain of an image intensifier tube increases with an increase in what? |
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Definition
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Term
| What happens when a multifocus image intensifier tube is operated in the magnification mode? |
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Definition
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Term
| (True or False) When using a multifocus image intensifier tube in magnification mode resolution is improved. |
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Definition
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Term
| Which "mode" provide the largest field of view (FOV) in a 25/17/12 image intensifier tube? |
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Definition
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Term
| How is th electron beam in a television camera tube produced? |
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Definition
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Term
| Which component of the television monitor transfers the video signal into a visible image? |
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Definition
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Term
| What is currently the most widely used recording media in fluoroscopic studies for "dynamic" imaging? |
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Definition
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Term
| What is the most significant advantage for using a spot film camera over a spot film cassette? |
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Definition
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Term
| List the three types (major categories) of artifacts. |
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Definition
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Term
| List the major types of exposure artifacts. |
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Definition
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Term
| List the major types of processing artifacts. |
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Definition
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Term
| List the major types of handleing and storage artifacts. |
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Definition
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