Technique Charts
Technique charts are unique to these.
What are x-ray machines or facilities?
This type of chart changes the kVp by 2 to 3 kVp per cm.
What is variable kVp chart?
Atelectasis will require this change in an exposure.
What is an increase?
An adjustment of this amount of mAs will compensate for a 2-cm increase in part size.
What is 30%?
It is helpful to test some of the exposures using this before using a technique chart on patients.
What is a radiographic phantom?
An advantage of this chart is that overall image contrast is lower, which may provide greater visibility of detail.
What is variable kVp?
A change in part size of 2 kVp/cm is sufficient below this range of kVp.
What is 85?
This is used to test the basic data needed to tailor a technique chart to an x-ray department.
What is a Supertech calculator?
This chart is based upon an optimum kVp value that is established for each projection.
What is fixed kVp?
Wet plaster casts require this change in mAs.
What is multiplied by 3?
If an image is too light, the best solution is usually an increase in this technical factor.
What is mAs?
Ascites will require this change in exposure
What is an increase?
This practice may result in charts being outdated or unavailable and may cause unnecessary exposure errors.
What is memorizing or estimating exposures?
The sample manual x-ray technique charts in Appendix B are this type of technique chart.
What is fixed kVp?
No change is required in technical factors for these casts and splints.
What are fiberglass casts and pneumatic splints?
If kVp is increased by 15%, mAs must be changed by this amount to keep the density constant.
What is by half?
This may cause all of the radiographs from a department to be too light (insufficient density).
What is processor malfunction?
This institution requires x-ray technique charts in radiography departments.
What is the Joint Commission for the Accreditation of Healthcare Organizations (JCO)
A modified fixed kVp chart has a fluctuation range of this amount from the optimum level.
What is +/-4 kVp?
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?
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?
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 exposure time?