WorksheetsRAD 121 Carroll Chap 14-16
Total questions: 10
Worksheet time: 5mins
Which of the following is equivalent to low sharpness:
good blur
short gray scale
low brightness
high penumbra
Foreshortening is a form of:
distortion
artifact
umbra
noise
The ability to distinguish two adjacent details as being separate and distinct from each other defines image:
visibility
resolution
sharpness
contrast
Penumbra occurs in all radiographic images because:
some degree of motion cannot be avoided
some degree of scatter radiation is always present
x-rays emanate from an area source
x-rays are emitted from a point source
The formula FS X OID/SOD is used to calculate the____ in a radiographic image:
noise
distortion
magnification
unsharpness
For the image of an object to be shape distorted, its length and its width must be altered by:
different degrees
the same degree
one being reduced, the other increased
off-centering
The mAs should be considered as the primary control for what aspect of the remnant x-ray beam?
distortion
magnification
sharpness of detail
intensity
Extremely low mAs could result in all of the following except:
loss of sharpness of detail
visible quantum mottle
loss of exposure intensity
loss of subject contrast
With all other factors unchanged, if mAs is increased by 50%, subject contrast in the remnant beam will:
increase as a direct result
decrease as a direct result
not change at all
may be affected indirectly, but is not directly controlled by it
All other factors equal, when mAs is reduced, the photoelectric/Compton ratio will:
increase
decrease
remain unchanged
