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WorksheetsRadiographic Image Production Module 1 Test Prep
Total questions: 20
Worksheet time: 10mins
The amount of light emitted from the display monitor is
brightness.
contrast resolution.
spatial resolution.
noise.
Which of the following contribute to subject contrast?
Differences in tissue thickness
Differences in tissue density
Effective atomic number
All of these
Making the digital image appear with low contrast, many shades of gray, is done by
raising the window level.
lowering the window level.
increasing the window width (wide WW).
decreasing the window width (narrow WW).
Increasing the matrix size for a fixed field of view (FOV) results in:
smaller pixel sizes.
larger pixel sizes.
increased spatial resolution.
smaller pixel sizes and increased spatial resolution.
To measure resolution, a __________ is necessary.
sensitometer
densitometer
resolution test pattern
resolution camera
An imaging system that can resolve a greater number of line pairs within 1 mm is said to have __________.
improved spatial resolution
decreased spatial resolution
improved brightness
decreased brightness
What is a measure of the imaging system’s ability to display the contrast of anatomic objects varying in size?
detective quantum efficiency
spatial resolution
spatial frequency
modulation transfer function
Which of the following combinations would result in an image with the least amount of magnification?
Decreased OID and decreased source-to-image receptor distance (SID)
Decreased OID and increased SID
Increased OID and decreased SID
Increased OID and increased SID
When the image of a structure appears shorter than the actual structure there is
size distortion.
elongation.
magnification.
shape distortion.
Brightness fluctuations on the image is called
brightness.
contrast resolution.
spatial resolution.
quantum noise.
Which of the following is a method of describing the strength of the radiation exposure compared with the amount of noise apparent in a digital image?
contrast-to-noise ratio
detective quantum efficiency
modulation transfer function
signal-to-noise ratio
An artifact that is imaged within the patient’s body is a
anatomic anomaly.
foreign body.
double exposure.
none of these.
During fluoroscopy, the x-ray tube is usually positioned underneath the table.
True
False
A pixel’s ______ determines the amount of shades of gray that can be displayed in a digital image.
size
location
height
bit depth
A digital image is composed of a combination of rows and columns recorded as a:
dynamic image.
latent image.
pixel.
matrix.
Place the following digital imaging steps in the correct order, from beginning to end: I remnant radiation reaches the digital image receptor II the manifest image is displayed on a monitor III the manifest image can be adjusted because it is composed of digital data IV the latent image is processed by the computer
III, IV, I, II
I, IV, II, III
I, II, III, IV
IV, III, II, I
Before processing, the image receptor has a(n) __________ image.
latent
visible
invisible
latent and invisible
A low-kilovoltage x-ray beam results in
increased attenuation.
decreased attenuation.
no change in attenuation.
decreased absorption.
For every 4–5 cm of tissue, the x-ray beam quantity is reduced by approximately
10%
25%
50%
75%
At higher kilovoltages within the diagnostic range
the percentage of photoelectric interactions increases.
the percentage of photoelectric interactions decreases.
the percentage of photoelectric interactions remains the same.
none of these.
