RAD 115 Distortion Test2 with Questions fully
Solved
what is the goal of distortion
reduce magnification
misrepresentation of the size and shape of the structures
distortion
results from different structures lying at different levels within the body
distortion
the difference between the structures being examined and the recorded image
distortion
evaluation and adjustment of distortion relies on what?
knowledge of the shape and size of the structure
distortion is directly related to what?
positioning
the long axis of the anatomical part must be perpendicular to what?
CR
the long axis of the anatomical part must be parallel to what?
film
what are the 2 types of distortion
size and shape
, which type of distortion is related to magnification
size
size distortion is controlled by what?
distances
if OID is decreased, magnification ___ (increases or decreases)
decreases
if magnification is decreased, resolution will be ___ (increased or decreased)
increased
if magnification is decreased, distortion will be __ (increased or decreased)
decreased
(t/f) magnification can be helpful
true
(t/f) dose is greater with larger patients
true
what are the 2 reasons that the dose might be greater to a larger patient
-part is closer to the tube
-require greater exposure due to thickness
when magnification is decreased, resolution will be ___ (increased or decreased)
increased
(t/f) you can never completely eliminate OID
true
Solved
what is the goal of distortion
reduce magnification
misrepresentation of the size and shape of the structures
distortion
results from different structures lying at different levels within the body
distortion
the difference between the structures being examined and the recorded image
distortion
evaluation and adjustment of distortion relies on what?
knowledge of the shape and size of the structure
distortion is directly related to what?
positioning
the long axis of the anatomical part must be perpendicular to what?
CR
the long axis of the anatomical part must be parallel to what?
film
what are the 2 types of distortion
size and shape
, which type of distortion is related to magnification
size
size distortion is controlled by what?
distances
if OID is decreased, magnification ___ (increases or decreases)
decreases
if magnification is decreased, resolution will be ___ (increased or decreased)
increased
if magnification is decreased, distortion will be __ (increased or decreased)
decreased
(t/f) magnification can be helpful
true
(t/f) dose is greater with larger patients
true
what are the 2 reasons that the dose might be greater to a larger patient
-part is closer to the tube
-require greater exposure due to thickness
when magnification is decreased, resolution will be ___ (increased or decreased)
increased
(t/f) you can never completely eliminate OID
true
