Technique Charts
Fixed vs. Variable
Pathology Changes
Adjustment of Techniques
Hodge Podge
100
Technique charts are unique to these.
What are x-ray machines or facilities?
100
This type of chart changes the kVp by 2 to 3 kVp per cm.
What is variable kVp chart? p. 149
100
Atelectasis will require this change in an exposure.
What is an increase?
100
An adjustment of this amount of mAs will compensate for a 2-cm increase in part size.
What is 30%? p. 152
100
This technical factor should be used to correct problems with radiographic density.
What is mAs?
200
It is helpful to test some of the exposures using this before using a technique chart on patients.
What is a radiographic phantom? p. 148
200
An advantage of this chart is that overall image contrast is lower, which may provide greater visibility of detail.
What is variable kVp? p. 149
200
COPD will require this change in an exposure.
What is a decrease?
200
A change in part size of 2 kVp/cm is sufficient below this range of kVp.
What is 85? p. 152
200
This radiographic quality characteristic is primarily affected by kVp.
What is contrast?
300
This is used to test the basic data needed to tailor a technique chart to an x-ray department.
What is a Supertech calculator? p. 148
300
This chart is based upon an optimum kVp value that is established for each projection.
What is fixed kVp? p. 149
300
Wet plaster casts require this change in mAs.
What is multiplied by 3?
300
If an image is too light, the best solution is usually an increase in this technical factor.
What is mAs? p. 153
300
Ascites will require this change in exposure
What is an increase? p. 153
400
This practice may result in charts being outdated or unavailable and may cause unnecessary exposure errors.
What is memorizing or estimating exposures? p. 146
400
The sample manual x-ray technique charts in Appendix B are this type of technique chart.
What is fixed kVp? p. 579
400
No change is required in technical factors for these casts and splints.
What are fiberglass casts and pneumatic splints?
400
If kVp is increased by 15%, mAs must be changed by this amount to keep the density constant.
What is by half? p. 154
400
This may cause all of the radiographs from a department to be too light (insufficient density).
What is processor malfunction?
500
This institution requires x-ray technique charts in radiography departments.
What is the Joint Commission for the Accreditation of Healthcare Organizations (JCAHO) p. 147
500
A modified fixed kVp chart has a fluctuation range of this amount from the optimum level.
What is +-4 kVp? p. 149
500
For conditions that require an exposure decrease, this amount of change is required in part measurement depending on the severity of condition.
What is a decrease of 2 to 4 cm?
500
The use of a grid results in this change in contrast, even when the kVp is increased to compensate for the grid.
What is increased? p. 156
500
When there is a likelihood of motion, it is wise to select this setting for mA and exposure time.
What is high mA and low expsoure time? p. 151
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