Term
| 4 Factors of the Control Panel That Affect Radiographic Quality: |
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Definition
1) Time (s)
2) Amperage
3) mAs
4) Voltage |
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Term
| 4 Factors That Affect Radiographic (not control panel factors): |
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Definition
1) Density
2) Detail
3) Distortion
4) Contrast |
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Term
Density: 1) ________ or ______ on a screen film radiograph.
2) Term used for digital? |
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Definition
1) Blackness or opacity
2) "brightness" |
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Term
| Order of densities (least to most) (5) |
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Definition
1) Gas
2) Fat
3) Muscle
4) Bone
5) Metals |
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Term
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Definition
| I one over I two equals D2 over D squared |
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Term
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Definition
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Term
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Definition
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Term
| Subject thickness and density affects _____. |
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Definition
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Term
Kilovoltage:
1) Energy of the ____ is affected by kVp
2) Higher kVp= penetration
3) Amount of ____ is affected by kVp
4) ___% rule |
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Definition
1) the beam
2) better
3) x-rays
4) 15% |
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Term
Distance:
a)SID reduced ½=__x increase in density
b)SID increased by 2=intensity cut ___ of original |
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Definition
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Term
Film:
a) made of _____.
b) AgBr = __________ and _______ (which is an _______)
c) Thicker emulsion = ______ film (more AgBr _________.) |
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Definition
a) polyester
b) silver and gelatin, emulsion
c) faster film, crystals |
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Term
Intensifying screens
a) decreases ___ dose
b) decreases ________ detail |
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Definition
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Term
Factors that influence screen speed (3):
1) _______ size
2) ________ thickness
3) ________ type |
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Definition
1) Crystal
2) Crystal
3) Phosphor |
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Term
Fog
a)decreased contrast increases or decreases density?
b) obscures or reveals detail? |
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Definition
a) increases density
b) obscures detail |
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Term
Assuming same exp. technique:
1) slow screen/film increases or decreases density?
2)fast screen/film increases or decreases density? |
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Definition
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Term
Collimators/Cones
1) decrease _____, increase ______ |
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Definition
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Term
Grid:
a) increases ______ by absorbing 90% or more of ______
b)Made of alternating strips of ____ and inner-space material |
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Definition
a) contrast, scatter
b) lead |
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Term
Filters:
a) filters out low energy ____ photons
b) decrease ______ dose |
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Definition
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Term
| Contrast: variation between any two _______ on the radiograph |
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Definition
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Term
| Increased subject part thickness ______ contrast. |
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Definition
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Term
| Kilovoltage determines ________ power of ____. |
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Definition
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Term
Low kvp=______ penetration
High kVp= __________ penetration |
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Definition
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Term
Long/____ Scale
High/____ Scale |
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Definition
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Term
Contrast: Intensifying Screen's ______ contrast.
Fog ______ contrast.
Grid & beam restrictors ________ contrast by decreasing scatter.
Filters _____ contrast, because energy of beam increases |
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Definition
Increases
Decreases
Increase |
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Term
| ______________ Angle can affect ______ due to superimposition of anatomy. |
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Definition
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Term
| Focal Spot Size is the _________ _________ of recorded detail. |
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Definition
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Term
| Increased OID decreases or increases detail? |
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Definition
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Term
| Small focal spot size produces the _______ detail. |
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Definition
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Term
| Increased SOD produces _______ detail. |
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Definition
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Term
| Increased SID produces _________ detail. |
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Definition
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Term
Distance:
Longer SID _________ amount of _________ reaching IR. |
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Definition
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Term
| Distance: What two laws affect distance? |
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Definition
Inverse Square Law
Direct Square Law |
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Term
| High speed film _____ detail. |
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Definition
| Decreases (slower=better) |
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Term
| Poor screen/film contact _____ contrast. |
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Definition
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Term
| Factors that contribute to distortion/magnification: |
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Definition
1) Beam Alignment
2) OID
3) SID |
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Term
| Distortion is the greatest toward the ______ side. |
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Definition
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