Ch. 12-17
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| show | base and emulsion
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| show | hold the silver halide crystals
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| Crystals in film emulsion consist of | show 🗑
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| show | gelatin
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| Latent imaging formation occurs during the film | show 🗑
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| show | sensitivity speck
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| The latent image can only be seen after | show 🗑
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| Photon interaction in the emulsion occur with exposure to both | show 🗑
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| show | speed
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| The efficiency of the intensifying screen is improved by the | show 🗑
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| A phosphorescent material emits light for a period of time after | show 🗑
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| show | luminescence and fluorescence
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| Luminescent material emits light after its outer shell _________ are excited | show 🗑
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| show | log
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| The ability of an intensifying screen to absorb xrays is called | show 🗑
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| The four primary exposure factors are | show 🗑
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| show | optical density, image contrast, and image noise
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| show | no change in beam quality and an increase in beam quantity
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| There is a direct relationship between the quantity of xrays and the | show 🗑
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| If mAs is increased from 20mAs to 40 mAs the patient dose will increase | show 🗑
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| A 15% increase in kVp has the same effect on density as _____ the mAs | show 🗑
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| A radiograph with long scale of contrast will also have wide latitude and _____ contrast | show 🗑
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| show | optical density
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| show | optical density
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| A technique of 55kVp @ 20mAs was used, what technique would double density and produce a longer scale radiograph? | show 🗑
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| Patient dose increases are directly related to increases in ______ | show 🗑
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| The small focal spot is used to provide ______ detail when less quantity if xrays is needed. | show 🗑
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| show | increase; reduce
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| Lung is the most ____ tissue in the body, fat is more radiolucent than muscle and bone is the most radiopaque | show 🗑
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| Emphysema makes the lungs ____ radiolucent | show 🗑
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| When only optical density needs to be changed only the ___ should be changed | show 🗑
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| show | SID; decreasing OID
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| ____ is caused by an angled body part when the beam is perpendicular to the image. | show 🗑
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| show | variable mAs technique; fixed kVp technique
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| With ____ the exposure is terminated when the optimum optical density is reached | show 🗑
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| show | vacuum
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| show | silicon
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| show | hardware
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| show | hardware
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| show | replace
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| The bit represents zero or ____ | show 🗑
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| In computer language, 2 bytes is a _____ | show 🗑
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| show | data
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| Teleradiology is the practice of transferring patient images, and ___ to remote sites | show 🗑
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| Digital radiography was first introduced by Fuji in ____ | show 🗑
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| CR IPs and FS cassettes can be used _____ with any xray imaging system | show 🗑
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| show | photostimulable luminescence
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| A photostimulable phosphor in a metastable state will emit light ___ when stimulated by xrays, when ___ by light and over time. | show 🗑
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| Europium is the ___ of the photostimulable phosphor | show 🗑
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| The CR cassette is called an ______ | show 🗑
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| show | reader, scanner
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| show | mechanical, optical, computer
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| show | exposure, stimulate IP, read IP, erase
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| Following the laser stimulation of PSP, the electrons are mostly ____. | show 🗑
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| show | stimulating
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| show | computer system
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| One of the similarities between CR and SF imaging is that both have ___ | show 🗑
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| The principle source of noise in CR is _____ | show 🗑
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| With computed radiography the contrast is constant ___ | show 🗑
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| The computed radiography image has ____ exposure latitude and improved ____ resolution | show 🗑
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| show | cassette
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| show | ghosting
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| Computed radiography images produce ____ gray shades | show 🗑
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| Switching from screen film imaging to computed radiography can reduce patient ______ | show 🗑
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| show | spatial
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| In medical imaging, the quality of spatial resolution is measured by the _________ | show 🗑
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| show | one
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| show | 1/8
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| As spatial frequency increases the object size decreases and the _____ increases. | show 🗑
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| show | 1
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| show | 30
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| show | dynamic range
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| Screen film radiography has a dynamic range of ____ | show 🗑
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| show | dynamic
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| The mammography digital imaging systems uses the highest ______ | show 🗑
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| show | signal
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| Recent studies have shown that denser breast tissue is best imaged with ____ mammography. | show 🗑
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| As mAs is increased the _______ is increased | show 🗑
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| show | spatial resolution
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| With digital imaging, patient dose can be reduced by using ___ kVp techniques | show 🗑
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| show | detective quantum efficiency
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| show | post processing
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