ARRT review
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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| As matrix size increases, what 2 things happen? | pixel size decreases, resolution increases (Saia, 232)
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| As KvP increases, scatter ______. | increases (Saia, 234)
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| As KvP increases, radiographic contrast_______. | decreases (Saia, 234)
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| As KvP increases, exposure rate ______. | increases (Saia, 234)
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| X-ray photon energy is ______ related to wavelength. | inversely (Saia, 236)
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| An increase in ____ serves to increase the number of photons produces at the target. | Ma (Saia, 236)
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| What is 2 dimensional, travels in the xy plane, and is a picture element? | Pixel (Saia, 240)
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| What is 3 dimensional, travels in the 2 plane, and is the depth of a pixel? | voxel (Saia, 241)
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| As FOV increases, pixel size ______. | increases (Saia, 242)
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| As FOV increases, the part being examines is ______. | magnified (Saia,242)
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| Low contrast, _____ scale. | long (Saia, 243)
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| High contrast, _____ scale. | short (saia, 243)
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| Osteoporosis, osteomalacia, and degenerative arthritis require a _______ in exposure factor | decrease (Saia 245)
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| Pneumoperitoneum, emphysema, necrotic, and atrophic conditions require a _______ in exposure factor | decrease (Saia 245)
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| Osteosclerosis, ascites, Atelectasis, edematous tissue and congestive heart failure require a _______ in exposure factor | increase (Saia 245)
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| Rheumatoid arthritis, pleural effusion, paget disease, and pneumonia require a _______ in exposure factor | increase (Saia 245)
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| As KvP increases, the wave length gets ____. | shorter (Saia 247)
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| As KvP increases, patient absorption ____. | decreases (Saia 247)
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| _____ illustrates pixel value distribution that is representative of a grayscale, and there are different ones for each body part. | histogram (Saia 247)
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| Histograms can be affected by? (8) | algorithm, scatter, SID, SOD, OID, collimation, positioning, centering (Saia 247)
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| The quantity of photons produced at the focal spot is a result of Ma, so an increase in focal spot size will ______ exposure rate | increase (Saia 248)
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| Diagnostic x-rays are _____ frequency and ______ wavelength. | high, short (Saia 248)
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| On lateral chest, outer photocells are selected, the film will be ______ and _____ density because the x-ray will be terminated almost immediately. | underexposure, decreased (saia 249)
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| Scatter radiation produces ____ on a film & _____ contrast, makes it have a _____ scale. | fog, decreases, longer(Saia 249)
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| As DEL increases, __________ increases | spatial resolution (saia 256)
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| As DEL decreases, ____________ | Spatial resolution decreases (saia 256)
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| An increase in KVP will produce a ____ scale of contrast. | longer (saia 256)
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| A decrease in KVP will produce a _____ scale of contrast. | shorter (saia 256)
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| Magnification in fluoro is accomplished by moving the II focal point _____ from the output phosphor | further (Saia 257)
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| Magnification in fluoro is accomplished by selecting a ____ part of the ____ phosphor | smaller, input (saia 257)
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| Processing algorithm represents the ______ and ______. | anatomical part and projection (Saia 258)
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| A decrease in KV will result in a _____ of optical density. | decrease (saia 260)
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| To make a noticeable change in density, increase mAs by ____ %. | 30 (saia 269)
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| As grid ratio is decreased, the scale of contrast gets ______. | longer (saia 269)
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| As grid radio is increased, the scale of contrast gets ______. | shorter (saia 269
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| To compensate for every 1 inch of OID, an increase of ____ inch of SID is required. | 7 (Saia 269)
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| Using high Kvp ______ exposure latitude. | increases (saia 271)
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| As Kvp increases, it produces _____ scale contrast. | longer (saia 271)
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| As window level increases, _____ increases. | brightness (Saia 273)
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| Window level is associated with image ______. | brightness (saia 273)
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| Window width is associated with image _____. | contrast (saia 273)
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| High KVP= _____ energy = ____ contrast= ____ scale | high, low contrast, longer scale (Wallace 83)
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| Low KVP= ______ energy = _____ contrast= _____ scale | low, high contrast, short scale (Wallace 83)
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| High contrast = _____ scale contrast | short (Wallace 76)
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| low contrast = _____ scale contrast | long (Wallace 76)
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| Scattered radiation _____ contrast | lowers (Wallace 84)
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| High Kvp= _____ scatter= _____ contrast image | more, low (Wallace 85)
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| Low Kvp= ____ scatter = ____ contrast image | less, high (Wallace 85)
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| Use of a grid _____ contrast. | increases (Wallace 102)
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| A small focal spot ______ recorded detail. | increases (Wallace 134)
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| Air gap _____ contrast & _____ density. | increases contrast, decreases density (Wallace 123)
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| Use of filtration ______ density and contras. | decreases (Wallace 120)
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| SID and density are _____ proportional. | inversely (Wallace 176)
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| OID and density are ____ proportional. | inversely (Wallace 176)
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| A grid with a higher ratio has more lead, and ____ density. | decrease(Wallace 176)
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| A large collimation field size produces ____ scatter and ____ density. | more, more (Wallace 176)
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| A high screen speed _____ density. | increases (Wallace 176)
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| Developer temperature and density are _____ proportional. | directly (Wallace 176)
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| SID _____ contrast. | doesn't affect(Wallace 178)
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| OID and contrast are _____ proportional. | directly (Wallace 178)
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| Focal spot ______ contrast. | doesn't affect (Wallace 178)
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| Increase in collimation size, _____ contrast. | decreases (Wallace 178)
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| When going from a 14x17 to a 4x4, there is ____ scatter and _____ contrast. | less, higher(more) (saia 264)
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