Chapter 13 - Cataractogenesis Flashcards
1
Q
What is the most common type of cataract caused by radiation?
A
Posterior subcapsular
2
Q
How are cataracts forms from radiation?
A
Radiation damages the epithelium cells which cause abnormal division causing weird fibers to be created. These fibers migrate to the posterior pole of the lens
3
Q
Latency is affected by?
A
Dose
4
Q
Cataracts are what type of effects?
A
Deterministic
- Has a threshold
- Dose deteremines severity
5
Q
What does NCRP stand for?
A
National Council of Radiation Protection and Measurment
6
Q
What does ICRP mean?
A
International Commission on Radiological Protection
7
Q
ICRPs recommended threshold dose for cataractogenesis?
A
0.5Gy acute
5-8 Gy if fractionated
8
Q
Occupational exposure limits to the lens is?
A
Avg 20mSv over 5 years with no one year over 50mSv
9
Q
NCRP doses for occupational exposure is?
A
50mGy
