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How are Xrys measured?
How are Rads abbreviated?
Are we able to deal better with whole body exposure or regional exposure?
Can you compare constant (total body) radiation worker may be exposed to with occasional (regional) radiation that patients my require?
What are 2 methods of shielding?
contact shielding and shadow shielding
When is gonad shielding required for men?
For males with childbearing potential, or if the gonad are in the primary beam. Unless shielding would interfere with the diagnostic yield of the film.
When is gonad shielding not required for women?
We do not use gonad shielding with the initial set of xrays because they would interfere with the diagnostic image of the film.
What are the 7 safety procedures?
- Tight collimation
- Intensifying screens
- Filtration in xray tube
- Wedge filters
- Using grid in designated focal range
- High optimum
What does the law say about Tight collimation?
It must show collimation on 3 sides or 3 corners showing a border at the films edge.
How does intensifying screen reduce safety risk?
helps with the image so we dont use as much radiation.
What is inherent filtration and how does it help reduce the safety risk?
It is an aluminum filter built inside the tube housing reducing the amount of radiation the patient is exposed to.
What is wedge compensating filters
Aluminum filters used on the outside of the tube used if there is significant difference in the thickness of the part being xrayed.
What does the law say about the use of the grid?
The grids shall be clearly labelled with the focal distant and the source to image distance for which they are designed.
How does High kV lessen the safety risk?
Higher kV gives more force allowing less mAs to be used which lowers the radiation exposure to the patient.
What does state and federal laws say about gonad shielding?
If the patient has childbearing potential or the gonads are in the primary beam. Unless shielding would interfere with the diagnostic yield of the film.
What are 3 types of shielding?
- PA positioning
When is breast shielding required?
only with patients with repetitive scoliosis x-rays
Eye do you shield the eyes?
Who is thyroid shielding for?
The worker, not the patient.
Do we take xrays on women who think they could be pregnant?
Who needs to sign a "Are you Pregnant" form?
All women who are of the age of childbearing years.
How do we reduce the risk of re-takes
- proper exposure technique
- proper patient positioning
- proper handling of the films
Which xrays is the technician allowred to take
Only the ones ordered by the Dr.
What safety postings are required by law?
A label on the control panel warning danger is operating instructions are not followed and restrictions for safe operation of the x-ray system
What safety precautions are taken in the operator's booth?
It should not be possible to reach the exposure switch from the edge of the wall, and a leaded glass window
When is a leaded apron used?
By the technician if she is pregnant, or if the xray machine is portable.
How is the amount of radiation measured for x-ray operators?
Personal dosimetry (radiation badges)
What does MPD stand for?
Maximum permissible dose.
What are the 5 radiation safety procedures for other sin the vicinitiy?
- leaded walls
- leaded doors
- staff should not hold pt's while being xray'd
- No non-essential individual in xray room
- no person exposed to x-ray for practice reasons
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