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PCBM M1T3 > Radiation > Flashcards

Flashcards in Radiation Deck (55)
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31

Is radon found in public water supply?

No

32

What element contains radon and might cause lung cancer?

Uranium

33

What does the EPA recommend as the standard for non-mining indoor radon levels?

4 pCi/L of air

34

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

35

Where would non-ionizing radiation be found?

Power lines, electrical appliances, TVs, video displays, radar, microwaves

36

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)
Ultraviolet (UV)
Ultrasound

37

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

38

Describe electromagnetic fields (EMF).

Include 50-60 Hz wave lengths
Associated with alternating currents in electric power generation, power lines

39

Describe radiofrequency (RF) and microwave radiation (MW).

MW absorbed near the skin, RF maybe absorbed through body
Damage through heating

40

What is the larges source of RF and MW?

Microwave ovens

41

What are the health concerns of RF and MW?

Neurologic, behavioral, reproductive, teratogenic

42

Describe infrared radiation (IR).

Skin and eye absorb infrared radiation (IR) as head
Furnaces, heat lamps, IR lasers

43

What are the health related effects of IR?

Skin (sunburns), eye (opacities)

44

Describe ultraviolet light (UV).

High photon energy range
No immediate symptoms of excessive exposure
Sun, black lights, welding arcs and UV lasers

45

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

46

Describe video display terminals (VDTs).

Radiation non-issue
No harmful emissions

47

L.A.S.E.R.S.

Light Amplification by Simulated Emissions of Radiation

48

Describe lasers.

Produce coherent, tightly focused beams of x-ray, UV, visible, or IR rad
Emit optical radiations, eye and skin hazard

49

What are the health effects of lasers in medical use?

Type, power output, viewing angle, length of exposure

50

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

51

Class I laser

No risk even if viewed directly

52

Class II laser

No injury if direct beam is viewed for 0.25 sec or less; low risk

53

Class IIA laser

Output not intended to be viewed; exposure must not exceed class I radiation for 1,000 sec

54

Class III laser

Can produce eye injury if beam is viewed even momentarily; moderate risk
Medical surveillance required

55

Class IV laser

Even diffuse reflection can produce eye damage; can injure skin and may pose fire hazard
Medical surveillance required