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RADT 1075 exam #1.
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Exam of 8 pages for the course RADIOBIOLOGY RADT 155 EXAM 1 REVIEW at RADIOBIOLOGY RADT 155 EXAM 1 REVIEW (RADT 1075 exam #1.)
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RADT 1075 exam #1An increased part thickness results in: - ANS-increased beam attenuation ( beam
absorption)
A body tissue with an increased tissue density results in: - ANS-increased beam
attenuation
Unwanted exposure to the IR due to scatter radiation is called: - ANS-fog
Brightness/density is a quality related to the _____________ of the radiographic image.
- ANS-Visibility of structures
Contrast is a quality related to the ______ of the radiographic image - ANS-Visibility of
structures
The amount of luminance of a display monitor is: - ANS-brightness
The overall blackness on the processed film image is: - ANS-density
Difference in the brightness levels or densities is: - ANS-image contrast
The number of shades of gray that can be displayed by a computer system is: -
ANS-Grayscale
A radiographic image with a large number of similar densities that have small
differences between them: - ANS-All the above: appears gray, has long scale contrast,
has low contrast
The quality of a radiographic image depends on:
A. Brightness - visibility of analog mic structures
B. Accuracy of the recorded an atomic structural lines
C. Contrast - visibility of an atomic structures - ANS-A,B and C
The smallest object that can be detected in an image is the: - ANS-spatial resolution (
recoded detail )
, The accuracy of the anatomical structural lines recorded in the radiographic image is
determined: - ANS-Spatial resolution
Radiographic misrepresentation of the size or shape of the anatomic structure being
imaged is:
A. Magnification
B. Elongation
C. Foreshortening
D. All of the above - ANS-All of the above
Shape distortion includes:
A. Magnification
B. Elongation
C. Size distortion
D. All of the above - ANS-Elongation
As seen on the radiographic image, scatter radiation: - ANS-decreases the visibility of
anatomic structures
With radiographic imaging, anatomic tissues, such as bone, that absorb most of the
radiation result in that area of the image being: - ANS-lighter (less density)
The three primary geometric factors affecting image quality are
____________________ - ANS-magnification, distortion, and focal spot blur
What is the formula for magnification factor? - ANS-MF = SID/SOD
Focal spot blur can be reduced by using ________________ - ANS-small focal spot
Radiographic image quality is improved when the _______________ is increased. -
ANS-source image distance
The technologist primarily controls radiographic contrast by varying the __________ -
ANS-kilovoltage
Changes in kVp affect:
A. Optical density
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