A technique chart provides the following information
1. MA 2. kVp 3. source-image distance (SID)
Manual technique charts are based on patient part measurements obtained using an x-ray caliper
thickness, in centimeters
The kVp that is sufficient to penetrate the body part adequately without excess exposure to the patient is called
What factors need to be considered when selecting the mA station
Exposure time and focal spot size
When selecting a low mA station (100 mA) you should use
the small focal spot.
The advantage of using a variable kVp technique chart are
Lower overall image contrast. Improved visibility of detail. ability to make small incremental changes in exposure technique.
Why should a small focal spot be used as much as possible.
It provides better image sharpness
How should a exposure factors be adjusted when there is the likelihood of motion?
increase mA , decrease exposure time
A satisfactory radiograph is made using 5 mAs with an image receptor relative speed (RS) of 400. How many mAs would be necessary to produce a radiographih of similar density if an RS 100 screen is used?
Which mA station can be used for the most average size patients to take advantage of the small focal spot?
If 10 mAs produces satisfactory results with a 5:1 ratio grid, what mAs would be needed if a 16:1 ratio grid is used?
Radiography of a wet plaster cast will require an increase in mAs of how much?
A fiberglass cast will require an increase in mAs of how much?
No change is required.
What x-ray projections can benefit from the use of compensating filters?
Ateroposterior (AP) thoracic spine axiolateral hip