Analysis
Mistakes
Distortion
Size
Details
100
This can be viewed to determine the proper size of the collimated field for extremities with increased OID
Shadow of the magnified structure projected onto the IR by the collimator light
100
Results in clipping of required anatomy on the projection
Over-collimation
100
Type of shape distortion occurring when one of the structure's axes appears disproportionately shorter on the projection than the opposite axis
Foreshortening
100
This focal spot should be used to maximize spatial resolution
Small
100
Refers to the ability of an imaging system to record sharp detail edges and distinguish small adjacent details from each other in a projection
Spatial resolution
200
During the image analysis process, this can be used to determine if an adequate amount of exposure reached the IR
Exposure indicator/index
200
Occurs with computed radiography when two projections are exposed on the same IR cassette without processing having been completed between exposures
Double exposure
200
Type of shape distortion occurring when one of the structure's axes appears disproportionately longer on the projection than the opposite axis:
Elongation
200
This is the minimal SSD that should be maintained for mobile radiography
12"
200
Outline of an anatomic structure
Profile
300
As CR angulation increases, the degree of anatomy movement ____________.
Increases
300
IF you make an error and send it to PACS, who you going to call?
PACS coordinator
300
The CR is angled in this direction.
Caudal
300
The act of throwing the image of an anatomic structure forward
Project
300
Sharpness of structures that have been included on the image
Recorded detail
400
A __________ OID produces an image with better spatial resolution.
Shorter
400
Is the positioning of this Neer shoulder optimal?
No!
What's wrong with it?
400
Upon comparison of image A to image B, what type of shape distortion demonstrated
Elongation
400
Brightness values (raw data) that represent only the anatomic structures of interest in DR
VOI (Values of interest)
400
AEC backup timer should be set at ____________ of the expected manual exposure time.
150% - 200%
500
Columns and rows of pixels (array) that divide a digital pixel
Matrix
500
What's wrong with this picture?
Marker placement
500
Refers to lack of detail sharpness in a projection that is caused by patient movement during the exposure
Motion unsharpness
500
Expressed in a unit of lp/mm
Spatial frequency
500
A post-processing manipulation that adds a black background over the areas outside the VOI to eliminate them and provide a perceived enhancement of image contrast
Contrast mask