Safe Radiographic Practice Flashcards
What do lead gloves protect against?
They only protect against scattered radiation. If hands are in the primary beam, even with gloves on, the x-rays will penetrate the gloves.
If manually restraining an animal, what should be done to ensure the handler is not receiving a dose of radiation from the primary beam?
The beam should be correctly collimated to ensure the primary beam is only as large as necessary.
How might an x-ray be ‘fogged’?
When handled in the x-ray room - e.g. wrong light colour/intensity, light leak
Why is it important to get the x-ray cassette the right way round?
The back of the cassette is lined with attenuating material to absorb x-rays and reduce scatter. An x-ray cassette placed the wrong way round would lead to an underexposed image.
How can letter placement affect a radiograph?
It could become superimposed on the shadow of the patient if placed too close to the patient it may also be lost under the patient and appear somewhere else in the anatomy.
What is wrong with this x-ray set up?
Dogs pelvis is thick so need to place film under the table so ther is a grid to prevent the film being exposed to excess scatter.
How could an inappropriate grid affect an x-ray exposure?
What could this result from?
It would have some areas of overdevelopment and some of underdeveloped.
This could result from:
- The Grid being used at the wrong film-focus distance
- The grid being used upside down
- Using a cheap, unfocussed grid
For a small object, e.g. a cat skull, a light exposure is needed. How can the lack of contrast associated with a light exposure be compensated for?
By using a lower kVp but higher mAs.
How do little lightning strikes appear on x-ray films?
Static electricity discharge.
