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Cards In This Set
| Front | Back |
|
What are the 3 qualities that make a good darkroom
|
-clean
-organized -lightproof |
|
What are the 5 steps of film processing
|
-develop (5 minutes @ 68 degrees F)
-rinsing (30 seconds) -fixing (twice as long as developer) -washing (30 minutes) -drying |
|
What are some advantages and disadvatages of automatic processings
|
-use higher height (98 degrees) than manual
-produces a dry film -get faster results -everything is pre-set (no stirring) so you get consistent results -they are expensive and can break |
|
What is the MPD for occupationally exposed personnal
|
-0.05 SV
-5.000 mlrem -5 rem |
|
What is the proper maintenance protocol for PPE
|
-hang up aprons
-don't bend or fold gloves, apron -inspect PPE periodically for tear, cracks and deterioration |
|
What are the 3 primary methods that personnal are exposed to radiation during radiography
|
-primary beam exposure
-secondary radiation (scatter) -leakage from the x-ray tube |
|
What are the roles of kVp, mA and time
|
-kVp: speeds up the electrons in the x-ray tube to allow the beam to penetrate (quality)
-mA: increases the intensity of the x-ray beam by controlling how many electrons are produced (quantity) -time: how long the x-ray beam is permissible to leave the x-ray tube |
|
If a film is too dark or too light, how would you change the mA? kVp?
|
-mA: 30-50%
-kVp: 10-15% |
|
What does scatter radiation do to the film
|
Creates haze
|
|
What type of grid do we use at school? what do grids do?
|
-they absorb non image producing x-rays
-we use a linear grid at school |
|
What is grid focus
|
The distance from the x-ray tube to the grid
|
|
What is the proper care for screens
|
-don't clean with paper towels
-don't drop them -clean them on a regular basis -leave open and vertical to air dry |
|
What are the 2 general categories of x-ray films
|
-screen film
-nonscreen film (require greater exposure to radiation because there are no screens) |
|
How much radiation is produced by the screens
|
- 5 % radiation
-95% is light |
|
How much radiation is produced by the x-ray tube
|
-1% radiation
-99% heat |
