RADT 1075 Exam #1 Questions and
Answers
An increased part thickness results in: - Answer-increased beam attenuation ( beam
absorption)
A body tissue with an increased tissue density results in: - Answer-increased beam
attenuation
Unwanted exposure to the IR due to scatter radiation is called: - Answer-fog
Brightness/density is a quality related to the _____________ of the radiographic image.
- Answer-Visibility of structures
Contrast is a quality related to the ______ of the radiographic image - Answer-Visibility
of structures
The amount of luminance of a display monitor is: - Answer-brightness
The overall blackness on the processed film image is: - Answer-density
Difference in the brightness levels or densities is: - Answer-image contrast
The number of shades of gray that can be displayed by a computer system is: - Answer-
Grayscale
A radiographic image with a large number of similar densities that have small
differences between them: - Answer-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 - Answer-A,B and C
The smallest object that can be detected in an image is the: - Answer-spatial resolution
( recoded detail )
The accuracy of the anatomical structural lines recorded in the radiographic image is
determined: - Answer-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 - Answer-All of the above
Shape distortion includes:
A. Magnification
B. Elongation
C. Size distortion
D. All of the above - Answer-Elongation
As seen on the radiographic image, scatter radiation: - Answer-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: - Answer-lighter (less density)
The three primary geometric factors affecting image quality are
____________________ - Answer-magnification, distortion, and focal spot blur
What is the formula for magnification factor? - Answer-MF = SID/SOD
Focal spot blur can be reduced by using ________________ - Answer-small focal spot
Radiographic image quality is improved when the _______________ is increased. -
Answer-source image distance
The technologist primarily controls radiographic contrast by varying the __________ -
Answer-kilovoltage
Changes in kVp affect:
A. Optical density
B. Image contrast
C. Image noise
D. All of the above - Answer-optical density, image contrast, image noise
Beam penetrability is increased if _____ is/are increased.
A. mAs
B. SID
C. kVp
D. All of the above - Answer-kVp
Answers
An increased part thickness results in: - Answer-increased beam attenuation ( beam
absorption)
A body tissue with an increased tissue density results in: - Answer-increased beam
attenuation
Unwanted exposure to the IR due to scatter radiation is called: - Answer-fog
Brightness/density is a quality related to the _____________ of the radiographic image.
- Answer-Visibility of structures
Contrast is a quality related to the ______ of the radiographic image - Answer-Visibility
of structures
The amount of luminance of a display monitor is: - Answer-brightness
The overall blackness on the processed film image is: - Answer-density
Difference in the brightness levels or densities is: - Answer-image contrast
The number of shades of gray that can be displayed by a computer system is: - Answer-
Grayscale
A radiographic image with a large number of similar densities that have small
differences between them: - Answer-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 - Answer-A,B and C
The smallest object that can be detected in an image is the: - Answer-spatial resolution
( recoded detail )
The accuracy of the anatomical structural lines recorded in the radiographic image is
determined: - Answer-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 - Answer-All of the above
Shape distortion includes:
A. Magnification
B. Elongation
C. Size distortion
D. All of the above - Answer-Elongation
As seen on the radiographic image, scatter radiation: - Answer-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: - Answer-lighter (less density)
The three primary geometric factors affecting image quality are
____________________ - Answer-magnification, distortion, and focal spot blur
What is the formula for magnification factor? - Answer-MF = SID/SOD
Focal spot blur can be reduced by using ________________ - Answer-small focal spot
Radiographic image quality is improved when the _______________ is increased. -
Answer-source image distance
The technologist primarily controls radiographic contrast by varying the __________ -
Answer-kilovoltage
Changes in kVp affect:
A. Optical density
B. Image contrast
C. Image noise
D. All of the above - Answer-optical density, image contrast, image noise
Beam penetrability is increased if _____ is/are increased.
A. mAs
B. SID
C. kVp
D. All of the above - Answer-kVp
