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final questions

QuestionAnswer
an image with low contrast appears very gray
a radiograph with few densities but great diff among them is said to have high contrast
what is the primary conroller of image contrast kvp
if the kvp were decreased by 15% and no changes were made to the mas density would decrease and contrast would increase
reducing the area of exposure (increasing collimation) ____ image contrast increases
generally speaking what do additive patholigcal conditions require increased kvp
which of the following changes will result in increased density with no change in contrast increased sid
if barium sulfate is selected as the contrast media, it is necessary to increase kvp
the relationship of the focal spot size, sid, and oid specifically impacts the ___ image geometric unsharpness
during the slection of the focal spot size, the radiographer is really determing the actual size of the filament used
when the sid is divded by the sod what is the result mag factor
the property of the xray beam that impacts the unsharpness on the radiography is beam divergence
the most detrimental factor to max recorded detail is motion
the misrepresentation of the size of an object is magnification
in order to image a structure that is located anteriorly in the bodym it is best to readiographed to minimized mag by doing a ___ projection pa
using a small focal spot size may be prohibited due to the amount of heat produced by xray exposure
the unit of line pairs per mm is a measure of resolution
magnification is affected by oid, sid
shape distortion can be created by off cetering the cr and angleing the cr
the ability of the system to differentiate between 2 small objects that have similiar subject contrast refers to contrast resolution
the ___ is the portion of the xray tube that contrains the filament cathode
the filament is made of tungsten
the focusing cup has a negative charge
____ is the phenomonem that occurs around the filament during thermoionic emission and prevents the furthur escape of electrons from the filament space chaqrge
what is the name of the exact area on the anode that is stuck by the electron beam focal spot
which of the following could be defined as the production of an xray photon by the electrostatic attraction between the incident electorn and the nucleus of the tungsten atom bremsstrahlung
which of the following could be defined as the production of an xray photon by a vollision between the incident electorn and the k shell electron of the tungsten atom characterisitc interaction
____ is the boiling off of electrons from the filament when the current is applied thermionic emission
ma is a measure of ___ that flows from cathode to anode tube current
increasing the kvp will do what increase the speed of electrons and increase the penterability of the beam
what is the focal spot size measured directly under the anode target effective focal spot
the filtration of the xray beam results in lower average energy photons and increassed beam quality
density is a ____ propperty of the radiographic image photographic
as it applies to a radiography, density is the measurement of the overall blackening on the radiography image
what is the minimum change in mas that would result in a visible change in radiographic density 30%
if the kvp were decrease bt 15% and no changes were made to the mas density would decrease and contrast would increase
what would be the appropriate change in mas if the kvp were decrease by 15% and the density needed to be maintained twice the mas
Created by: rachelbeatty4
 

 



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