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RAD-172 (DENS/IR CONTRAST. REC. DETAIL)INCREASE OR DECREASE REVIEW
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which of the tech factors will produce a darker radiograph (increased density)or an increased exposure to IR
10 mAs 60kv
10mAs 70kv
10mAs 70kv
More scatter, more photons, more penetration
increasing kvp will ____ the radiographic density/IR exposure
increase
More penetration, more scattered photons hitting the IR
decreasing mAs will ___ the radiographic density/IR exposure
decrease
Less photons created and hitting the IR
increasing the thickness of the body part will _____ radiographic density/IR exposure
decrease
Less photons will make it through the patient to expose IR
increasing sid from 40-80 will ____ radiographic density
D
Less radiation hits the IR (Inverse Square)
decreasing the grid ratio will ___ the radiographic density/Ir exposure
increase
7. Increasing processor temperature will ________the radiographic film density.
increase
Reducing agents over-react and turn all crystals into black metallic silver
6. Decreasing the grid ratio will ____________the radiographic density/IR exposure.
increase
Less photons get absorbed in lead strips and more scatter gets through
6. Decreasing the amount of filtration will ___________ the radiographic density/IR exposure.
I
6. Increasing collimation will ______________the radiographic density/IR exposure.
D
less tissue is irradiated so less scatter is created
Increasing the speed of the intensifying screens will _________the radiographic film density.
I
faster screens expose IR to more light photons
7. Decreasing kVp will ______________the radiographic density/IR exposure.
D
7. Increasing the mAs 15% will _____________visible radiographic film density.
no change
mAs must be changed 30% to see a visible density difference on film
7. When the anode heel effect is apparent, what side of the IR can appear more exposed?
cathode more photons hit the cathode side due to absorption of the beam in the heel of the anode
9. Increasing kVp will ________________the amount of photoelectric absorption interactions occurring.
D
9. Decreasing the kVp will _____________contrast.
I
9. Decreasing the mAs 30% will ____________contrast.
not affect
9. Increasing filtration will __________contrast.
D
9. Increasing collimation will _______________ contrast.
I
9. Decreasing the thickness of the body part will _____________ contrast.
I
9. Increasing grid ratio will ______________contrast.
I
9. Increasing kvp and IS screens will _______ contrast.
I
H&D curve shows films with increased speed generally have higher contrast
9. Decreasing processing temperature will _______contrast.
D
any change that does not provide optimal processing conditions will decrease film contrast
9. Increasing OID will _________________ contrast.
I
Allows scatter to angle away from the film due to air-gap
9. Increasing the processing time (immersion time) will _______contrast.
D
9. Angling the x-ray beam through a body part while maintaining the same SID will __________ contrast.
D
9. Poor film screen contact will cause recorded detail to _____.
D
light diffusion causes loss of detail
9. Increasing the size of the focal spot will __________recorded detail.
D
9. Decreasing SID will ___________recorded detail.
D
more angled photons will expose film causing geometric unsharpness
9. Increasing OID will ____________recorded detail.
D
More magnification will increase geometric unsharpness and decrease detail
9. Increasing film/screen speed will ___________ recorded detail.
D
Smaller crystals/thinner layer provide better recorded detail
9. Motion will ___________ recorded detail.
D
9. Increasing film processing temperature will ______ recorded detail.
not affect
9. Using compression will _______recorded detail.
I
reduces the possibility of motion
9. Increasing SID will ___________ recorded detail.
I
9. Going from a .5 mm to a 1.25 mm focal spot size will ______recorded detail.
D
9. Decreasing the crystal/phosphor size will _____ recorded detail.
I
Smaller crystal size or phosphor size = better detail
increasing SID will ___ size distortion
decreases
increasing OFD will ___ size distortion
increase
improper cr alignment will ___ shape distortion
increase
decreasing ofd will ___ shape distortion
not affect
Author
anatomy12
ID
266504
Card Set
RAD-172 (DENS/IR CONTRAST. REC. DETAIL)INCREASE OR DECREASE REVIEW
Description
xray
Updated
5/5/2014, 12:25:02 PM
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