High radiation dose gives rise to deterministic effects which reliably occur above a threshold, and their severity increases with dose.
2.
High doses produce deterministic effects, which is the " severity " of acute tissue damage that is certain to happen.
3.
The driver for this is the need to measure the deterministic effect, which it is suggested, is more appropriate than stochastic effect.
4.
Deterministic effects are not necessarily more or less serious than stochastic effects; either can ultimately lead to a temporary nuisance or a fatality.
5.
The committed dose is not intended as a measure for deterministic effects such as radiation sickness which is defined as the " severity " of a health effect which is certain to happen.
6.
The use of the sievert implies that only stochastic effects are being considered, and to avoid confusion deterministic effects are conventionally compared to values of absorbed dose expressed by the SI unit gray ( Gy ).
7.
At this time it was first stated that the purpose of radiological protection was that of avoiding deterministic effects from occupational exposures, and the principle of radiological protection was to keep individuals below the relevant thresholds.
8.
This would avoid confusion between equivalent dose, effective dose and dose equivalent, and to use absorbed dose in Gy as a more appropriate quantity for limiting deterministic effects to the eye lens, skin, hands & feet.
9.
Conventionally therefore, unmodified absorbed dose is not used for comparing stochastic risks but only used to compare against deterministic effects ( " severity " of acute tissue effects that are certain to happen ) such as in acute radiation syndrome.
10.
By combining eye diagramming techniques with precisely positioned BER measurements, Jim Waschura invented a technique of sweeping the interior of an eye diagram to curve-fit measurements to mathematical models representing the interior slopes of the eye diagram for random and deterministic effects.
मोबाइल