Radiation Safety Flashcards
What are the 2 types of biological effects of radiation?
Deterministic
Non-deterministic
what biological effects of radiation are non-stochastic and stochastic?
deterministic - non-stochastic
non-deterministic - stochastic
What makes biological effects of radiation deterministic?
have a threshold dose, so below this the effect does not occur
what are symptoms of acute deterministic radiation?
radiation sickness 2-10 Sy whole body irritation
death >10 Sy whole body irritation
what are symptoms of chronic deterministic radiation?
hair loss
cataracts
sterility
obliterative endarteritis
what makes biological effects of radiation non-deterministic?
occur at random, no threshold dose
damage affects patients and future children
what are somatic effects of non-deterministic radiation?
development of malignancy
what are genetic effects of non-deterministic radiation?
congenital abnormality which may include malignancy
what type of radiation is likely in dentistry?
non-deterministic
what are 3 factors affecting dose of radiation?
type of radiation
tissues being irradiated
age of patient
what is the dose limitation for dental workers?
mean dose - <0.1mSv
never exceed 1mSv
what is the dose limitation for patients?
ALARP
What are way to reduce dose?
use F speed
higher Kv
rectangular collimation
collimated DPT views
regular servicing of machines
how far should you stand from machines?
2m
