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Digital Imaging Ch. 21 & 22

Terms in this set (79)

When developing exposure factors for digital imaging system, which factors need to continue to be considered?
Body Habitus
ALARA
Optimal kVp Settings
If a technologist fails to properly center over the appropriate automatic exposure control (AEC) cell, what undesirable results are likely to occur?
Underexposure & Mottle
If a technologist fails to proper align the exposure field with a digital image receptor, what undesirable result is likely to occur?
Histogram Errors & Suboptimal EI values
The software function responsible for evaluating the collimated borders of an exposed imaging plate is called:
Exposure Field Recognition
One of the problems identified with the technologist interface with digital imaging systems and technique selections is that:
Visual cues indicating over- or underexposure are no longer present on the image
True/False: the 15% rule can be used to adjust technique for changed patient thickness
True
True/False: Digital imaging systems are inherently mAs driven
False
True/False: The field size must be large enough so that at least 30% of the image receptor is exposed.
True
True/False: It is recommended that all exposures be made using a minimum of 70 kVp.
False
True/False: To avoid image mottle, expose all digital images without a grid whenever possible
False
The practice of using higher exposure factors than needed to obtain a diagnostic radiograph is commonly referred to as:
Dose Creep
According to comparative anatomy principles, if a technologist had developed an acceptable technique for an AP L-spine, the technique for an AP Pelvis would be:
the same
Which of the following statements is true regarding kVp's role when using digital imaging systems?
kVp ensures adequate penetration of the anatomy
The quality that best describes digital imaging's ability to display a diagnostic radiograph even if the technical factors used are 400% greater than actually needed is exposure:
Latitude
When an image is said to be "saturated," this means that:
Excessive overexposure has occurred
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