LRA 211 WEEK 3 EXAM QUESTIONS
AND ANSWERS
What is defined as "the range of exposure intensities an image receptor can accurately
detect - Answer- dynamic range
For a given field of view (FOV), a _________ matrix size will result in _________ pixels.
- Answer- large, more
In digital imaging, which of the following determines the range of grayscale available for
display - Answer- pixel bit depth
During digital image display, the contrast can be lowered (decreased by increasing -
Answer- window width
The ability of the imaging system to distinguish between small objects that attenuate the
x-ray beam similarly defines: - Answer- contrast resolution
Increasing the displayed field of view (FOV) for a fixed matrix size will result in: -
Answer- increased pixel size
The visibility of anatomic structures is increased with: - Answer- increased contrast-to-
noise ratio (CNR) & increased signal-to-noise ratio (SNR)
Describes the process of radiographic image formation - Answer- diffeential absorption
x-rays can eject electrons from atoms. This is known as - Answer- ionization
the x-rays interaction with an atomic tissue that is responsible for scattering is - Answer-
compton
what will increase beam attenuation - Answer- thicker anatomic part
factors that decrease x-ray beam quality - Answer- increased x-ray beam quality
the range of exposure intensities an image receptor can accurately detect defines: -
Answer- dynamic range
AND ANSWERS
What is defined as "the range of exposure intensities an image receptor can accurately
detect - Answer- dynamic range
For a given field of view (FOV), a _________ matrix size will result in _________ pixels.
- Answer- large, more
In digital imaging, which of the following determines the range of grayscale available for
display - Answer- pixel bit depth
During digital image display, the contrast can be lowered (decreased by increasing -
Answer- window width
The ability of the imaging system to distinguish between small objects that attenuate the
x-ray beam similarly defines: - Answer- contrast resolution
Increasing the displayed field of view (FOV) for a fixed matrix size will result in: -
Answer- increased pixel size
The visibility of anatomic structures is increased with: - Answer- increased contrast-to-
noise ratio (CNR) & increased signal-to-noise ratio (SNR)
Describes the process of radiographic image formation - Answer- diffeential absorption
x-rays can eject electrons from atoms. This is known as - Answer- ionization
the x-rays interaction with an atomic tissue that is responsible for scattering is - Answer-
compton
what will increase beam attenuation - Answer- thicker anatomic part
factors that decrease x-ray beam quality - Answer- increased x-ray beam quality
the range of exposure intensities an image receptor can accurately detect defines: -
Answer- dynamic range
