Image acquisition and evaluation review
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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show | amount of blackness on a given area of a radiograph
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show | quantity of xrays produced
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kVp controls what? | show 🗑
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Contrast | show 🗑
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density may be defined as: | show 🗑
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show | exit rays striking the image receptor
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show | mAs and window level
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show | density is directly proportional to mAs
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show | mAs
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the law stating that any combinations of mA and time that produce the same mAs value will produce the same radiographic density is the: | show 🗑
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show | PSP
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the primary controlling factors of contrast are: | show 🗑
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the relationship between kVp and density may be described as: | show 🗑
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the 15% rule states that: | show 🗑
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what governs the relationship between SID and density? | show 🗑
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show | density is reduced to one-fourth
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show | reduce mAs to one-fourth its original value
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show | Long OID, Large focal spot, patient motion, magnification
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show | high-resolution monitor capable of displaying millions of pixels
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a primary advantage to digital fluoroscopy is: | show 🗑
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which of the following describes the relationship between radiographic density and the use of grids? | show 🗑
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the use of filtration: | show 🗑
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show | density decrease
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show | anode heel effect
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the thicker part of anatomy should be placed under which aspect of the xray tube? | show 🗑
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show | make detail visible
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a radiograph with few gray tones, primarily exhibiting black and white, would be described as having what type of contrast? | show 🗑
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poorer recorded detail may be caused by which of the following factors? | show 🗑
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show | low contrast, long scale, many gray tones
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low kVp produces which of the following? | show 🗑
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show | high
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show | photoelectric interaction
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show | increase contrast because of reduction in the number of compton interactions that occur
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the adjustment in technical factors required when using beam restriction is: | show 🗑
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show | increase contrast
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as the amount of beam filtration is increased: | show 🗑
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the portion of contrast that is caused by variations in the anatomy or is secondary to pathological changes is called: | show 🗑
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show | geometric representation of the part being radiographed
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show | long SID, short OID, small focal spot
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optimal recorded detail may be created using what? | show 🗑
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show | shape distortion
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show | short SID, long OID
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distortion that occurs when the xray beam is angled against the long axis of a part is: | show 🗑
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distortion that occurs when the xray beam is angled along the long axis of a part is: | show 🗑
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the actual patient dose as measured by a meter embedded in the collimator is: | show 🗑
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show | every 3 months
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quality assurance and maintenance of CR cassettes includes erasing plates at least: | show 🗑
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show | image appearance consistency
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a software function that evens the brightness displayed in the image called: | show 🗑
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show | the latitude of collimation that still allows the software to detect collimated edges
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show | increasing kVp
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show | scatter and background radiation
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show | histogram analysis error
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show | edge enhancement
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as speed class increases: | show 🗑
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smoothing software may result in: | show 🗑
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show | degrade visibility of anatomy
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a high SNR provides an image with: | show 🗑
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show | detail
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grid ratio is defined as: | show 🗑
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grid frequency is defined as: | show 🗑
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show | focused grid
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show | grid radius
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show | crosshatch grids
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show | decreased density on a radiograph as a result of absorption of image forming rays
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use of the air gap technique: | show 🗑
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materials that make flat panel detectors possible are: | show 🗑
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Which of the following maintains image brightness over a wide range of exposures? | show 🗑
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show | bit depth
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the smallest exposure change able to be captured by a detector is called: | show 🗑
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show | dose area product
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show | detector size
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show | detector element
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what allows more anatomical structures to be captured during an exposure? | show 🗑
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the range of receptor exposures that provides a quality image is called: | show 🗑
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which of the following is a graphical representation of pixel values? | show 🗑
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undesirable fluctuations in brightness are called: | show 🗑
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the number of pixels making up the digital image is the: | show 🗑
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show | modulation transfer function (MTF)
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which of the following terms describes the highest spatial frequency that can be recorded by a digital detector? | show 🗑
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what converts light into a charge? | show 🗑
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the smallest area represented in a digital image is the: | show 🗑
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show | pixel density
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the space from the center of a pixel to the center of the adjacent pixel is called: | show 🗑
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show | quantization
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a material that absorbs xray energy and emits part of that energy as visible light is called: | show 🗑
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bit depth is equal to: | show 🗑
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receptor exposure | show 🗑
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show | to see a difference in density, the mAs must change at least 30%
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filtration effect on contrast? | show 🗑
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collimation effect on contrast? | show 🗑
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show | lines pairs per millimeter (lp/mm)
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what technical factors should be used for wet plaster casts? | show 🗑
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show | increase 10 kVp
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what technical factors should be used for fiberglass cast? | show 🗑
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show | not over 70 kVp
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what technical factors should be used for barium contrast? | show 🗑
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whats the order of film development? | show 🗑
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where do most processor problems with film occur? | show 🗑
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what temperature should the developer be? | show 🗑
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the faster the speed of the screen? | show 🗑
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where is the micro switch located that controls replenishment | show 🗑
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collimation effect on density? | show 🗑
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show | 36"
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does mAs go up or down for a higher grid ratio? | show 🗑
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show | increase mAs=increase density
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show | increase kVp=increase density
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show | increase SID=decrease density
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grid ratio effect on density? | show 🗑
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show | increase filitration=decrease density
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show | increase anode heel effect=decrease density
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show | increase factors=decrease density
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kVp effect on contrast? | show 🗑
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show | increase OID=increase contrast
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show | increase grid ratio=increase contrast
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patient factors on contrast? | show 🗑
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Created by:
Chrslarsen
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