ARRT registry review covering Image Production and Evaluation
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| An increase in added filtration will result in a ______ in x-ray intensity and a _______ in effective energy of the x-ray beam. | decrease, increase
Buschong p146
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| What is the direction of electron travel in the x-ray tube? | cathode to anode
Buschong p122
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| What technical changes would best serve to remedy the effect of very dissimilar tissue densities? | high-kilovoltage exposure factors
Buschong p273
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| Where is the focal-spot blur the greatest? | at the cathode end of the x-ray beam
Buschong p287
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| What is the reduction in x-ray photon intensity as the photon passes through material? | attenuation
Buschong p185
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| What radiographic instruments are used to measure the thickness of body parts in order to determine optimal selection of exposure factors? | calipers
Buschong p 308
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| The slit camera test requires two exposures to evaluate ______ and accuracy? | focal-spot
Buschong p462
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| Two types of exposure-time artifacts are_______ and ______? | double exposure and motion
Buschong p473
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| What is the continued emission of light by a phosphor after the activating source has ceased? | phosphorescence
Buschong p221
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| What imaging a body part over 4 inches and using a high kilovoltage, what sort of radiographic equipment can be employed to produce a better image? | Grid
Buschong p248
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| Differential absorption is related to pathology and ________. | subject contrast
Carlton p245
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| Greater latitude is available to radiographers in film/screen imaging when they use ________ factors. | high-kilovoltage
Carlton p185
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| If 16 mAs was used to produce a particular x-ray image, what new mAs value would be required to produce a similar image if the kVp was increased by 15% | 8 mAs
Buschong p254
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| When the light field goes pass the body as in a lateral lumbar, what can be done to prevent excessive density due to undercutting? | use lead rubber to absorb primary radiation on tabletop
Carlton p233
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| What is used to express the resolution of a diagnostic image? | line pair per millimeter (Ip/mm)
Carlton p334
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| What is used to express resolution/recorded detail? | Modulation transfer function
Carlton p334
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| As the CR laser scanner/reader recognizes the photostimulated luminescence released by the PSP storage plate, it constructs a graphic representation of a pixel value distribution. This is a? | histogram
Carlton p361
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| Improved recorded detail and heat capacity can be achieved with an anode with a _______ angle. | small
Buschong p139
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| High signal-to-noise is most likely to produce a _____-quality image? | high
Buschong 112
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| True or False: Beam restriction improves spatial resolution? | False
Buschong p243
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| Geometric unsharpness is affected directly by? | OID
Carlton p444
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| The scale of contrast becomes longer as grid ratio _______. | decreases
Carlton p432
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| With the anode heel effect, the intensity of the x-ray beam is greatest at? | the cathode end of the beam
Carlton p407
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| Radiographs made with parallel grids show decreased density on their lateral edges from? | decreased SID
Carlton p260
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| Using 600mA and 0.02sec would be more helpful to control voluntary or involuntary motion? | involuntary motion
Carlton p451
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| On CR imaging, the latent image present on the PSP is changed to a computerized image by: | the analog to digital converter (ADC)
Carlton p358
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| Grids being off-center can cause_______ which would result in overall loss of density. | grid cutoff
Carlton p257
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| When a radiologic technologist uses a SID of 25-30 inches with a 14X17 IR, it is likely to: | increase the anode heel affect
Carlton p407
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| Luminescent light that is emitted by the PSP gets transformed into the image on the CRT by: | ADC
Carlton p357
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| What layer of the CR image plate records the radiographic image? | photostimulable phosphor
Carlton p357
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