Any radiologists out there who can explain "thresholds"?

[Brian d marge]

Muggins here accepted some work, and i need to understand what a threshold is

when talking about X Rays , Something to do with the signal value

Would be grateful if some one could help

kind regards in advance

Stephen

[Mom]

http://www.ccohs.ca/oshanswers/phys_.../ionizing.html

[Brian d marge]

http://www.ccohs.ca/oshanswers/phys_.../ionizing.html

thanks for that, I think this is going to take some nuttin out

Stephen

[Mom]

thanks for that, I think this is going to take some nuttin out

Stephen

I started to type something up for you and then it got all complicated, so I figured that site would give you a better perspective and hopefully in not as garbled a fashion as I would have.

[Brian d marge]

I started to type something up for you and then it got all complicated, so I figured that site would give you a better perspective and hopefully in not as garbled a fashion as I would have.

I cant link that site with "threshold " is it a X ray / radiation strength? limit Hz?

Stephen

ps thanks for your time

[Mom]

I cant link that site with "threshold " is it a X ray / radiation strength? limit Hz?

Stephen

ps thanks for your time

What effects do different doses of radiation have on people?

One sievert is a large dose. The recommended TLV is average annual dose of 0.05 Sv (50 mSv).

The effects of being exposed to large doses of radiation at one time (acute exposure) vary with the dose. Here are some examples:

10 Sv - Risk of death within days or weeks

1 Sv - Risk of cancer later in life (5 in 100)

100 mSv - Risk of cancer later in life (5 in 1000)

50 mSv - TLV for annual dose for radiation workers in any one year

20 mSv - TLV for annual average dose, averaged over five years


What are the limits of exposure to radiation?

The Threshold Limit Values (TLVs) published by the ACGIH (American Conference of Governmental Industrial Hygienists) are used in many jurisdictions occupational exposure limits or guidelines:

20 mSv - TLV for average annual dose for radiation workers, averaged over five years

1 mSv - Recommended annual dose limit for general public (ICRP - International Commission on Radiological Protection).

[Brian d marge]

So its a dose of radiation

Thanks thats set me straight I think

Stephen

[Hitcher]

The integument used to so hide,
The organs and bones deep inside,
'Till Röentgen discovered,
Rays that uncovered,
Whatever was wounded, save pride.