Numbers
1mGy/hr at 1m.
What is protective housing regulation?
Skin reddening
What is erythema?
4 - 7 years
What is dormant time for leukemia?
Time, Distance, Shielding
What are protection rules?
High MA, Lowest time possible
What helps reduces motion and also reduces dose due to less repeats?
50mSv
What is annual dose limit for any age radiographer?
Stage that N&V starts.
What is prodromal stage?
15 years
When can many long term radiation caused problems can start occuring?
7 ft
What height is primary barrier?
Filter
What reduces dose before it can reach patient?
Age x 10mSv
What is cumulative annual effective dose limit?
Stage where symptoms quiet down.
What is latent stage?
Cataracts and Cancer
What are 2 of the most common long term effects we worry about?
0.5mm Pb
What is lead requirement for protective and gonadal shielding?
2.5mm Al/eq
What is filter requirement above 70 KVP?
0.5 mSv
What is per month pregnancy dose limit?
Stage where symptoms resume.
What is manifest stage?
Affects person irradiated (person who received the xray)
What are somatic effects?
1/32" Pb / eq
What strength must secondary barrier be?
Total absorption of xray = all dose
What is Photoelectric Effect?
500mSv
What is dose limit to extremeties?
6 Sv dose
When does radiation death known to occur?
These effects cannot be determined.
What are stochastic effects?
High KVP, LOW mAs
What is technique guideline?
Increasing beam restriction.
What helps you reduce dose to patient and reduce scatter for image?