Flashcards in Radiation Deck (55)
Is radon found in public water supply?
What element contains radon and might cause lung cancer?
What does the EPA recommend as the standard for non-mining indoor radon levels?
4 pCi/L of air
What is non-ionizing radiation
Energizes or excites molecules without breaking them apart
Series of energy waves composed of oscillating electric and magnetic fields traveling at the speed of light
Where would non-ionizing radiation be found?
Power lines, electrical appliances, TVs, video displays, radar, microwaves
What are the different types f non-ionizing radiation?
Extremely low frequency (ELF)
Electromagnetic fields (EMF)
Magnetic Resonance Imaging (MRI)
Radiofrequency and Microwave rad (RF)
Describe extremely low frequency (ELF) radiation.
Produced at 60 Hz, produced by power lines and electrical wiring
Can effect Ca homeostasis, chromosome damage/RNA transcription, cell response to hormones and enzymes and NTs, cellular immune response and interacts with cancer cells
Describe electromagnetic fields (EMF).
Include 50-60 Hz wave lengths
Associated with alternating currents in electric power generation, power lines
Describe radiofrequency (RF) and microwave radiation (MW).
MW absorbed near the skin, RF maybe absorbed through body
Damage through heating
What is the larges source of RF and MW?
What are the health concerns of RF and MW?
Neurologic, behavioral, reproductive, teratogenic
Describe infrared radiation (IR).
Skin and eye absorb infrared radiation (IR) as head
Furnaces, heat lamps, IR lasers
What are the health related effects of IR?
Skin (sunburns), eye (opacities)
Describe ultraviolet light (UV).
High photon energy range
No immediate symptoms of excessive exposure
Sun, black lights, welding arcs and UV lasers
What are the health related effects of UV light?
Inc skin exposure and exposure to artificial light
Skin damage, melanotic skin cancer, non-melanotic skin cancer
Describe video display terminals (VDTs).
No harmful emissions
Light Amplification by Simulated Emissions of Radiation
Produce coherent, tightly focused beams of x-ray, UV, visible, or IR rad
Emit optical radiations, eye and skin hazard
What are the health effects of lasers in medical use?
Type, power output, viewing angle, length of exposure
What are some adverse heath effects of lasers?
Skin - erythema, blistering, incineration
Respiratory tract effects due to airborne contaminates produced
Eye - epthelial stripping, granuales, haze, opacities, depends on exposure type, dependent on whether exposure is infrared, UV, or visible
Class I laser
No risk even if viewed directly
Class II laser
No injury if direct beam is viewed for 0.25 sec or less; low risk
Class IIA laser
Output not intended to be viewed; exposure must not exceed class I radiation for 1,000 sec
Class III laser
Can produce eye injury if beam is viewed even momentarily; moderate risk
Medical surveillance required