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Distortion
N/A
14
Physics
Professional
04/05/2013

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Cards

Term
factors that control distortion are directly related to ___
Definition
positioning
Term
size distortion is a funtion of __ and ___
Definition
decreased SID
increased OID
Term
reduced magnification ___ the resolution of the recorded detail
Definition
increases
Term
magnification is controlled by ___ and ___ to maximize SID and minimize OID
Definition
positioning body part
xray tube
Term
misrepresentation by unequal magnification of the actual shape
Definition
shape distortion
Term
two types of shape distortion
Definition
elongation
foreshortening
Term
occurs when the tube or IR are improperly aligned
Definition
elongation
Term
occurs when part being examined is not properly aligned
Definition
foreshortening
Term
two types of size distortion
Definition
magnification
diffuse blurring
Term
three geometric principles of distortion
Definition
object thickness
object position
spatial distortion
Term
due to OID, thicker part will have more distortion
Definition
object thickness
Term
when object plane and image plane are not parallel
Definition
object position
Term
degree of distortion affected by objects ___
Definition
thickness/ inclination
Term
minimal along the CR
as object shifts laterally, spatial distortion increases
Definition
spatial distortion
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