szczury.org

Paul_Julian pisze: Inna sprawa, ze niektóre guzy się przeciez traktuje promieniami :/

szacunkowe wyliczenia mówią o tym, że po podaniu dawki 1 Gy ( w małych porcjach, w długim okresie czasu- bo dawki się sumują) prawdopodobieństwo zachorowania na nowotwór wynosi jak 1/ 1000; podobnie jest w przypadku przekazywania chorób genetycznych; należy więc w miarę możliwości unikać zbędnych dawek promieniowania ( korzystać w nich w sytuacjach, które tego koniecznie wymagają);

Dopuszczalna dawka promieniowania wynosi 0.15-1.25 Gy, a podczas badań scyntygraficznych pacjent otrzymuje 0.01-0.1 Gy

If a group of mice is exposed to 600 to 700 rads of X-rays delivered in a brief period (the exact dose for the response described depends on strain, age, and other variables described below) and observed over several days, one is struck by the apparent lack of any gross evidence of any effect for several days. The animals appear entirely normal. Although progressive weight loss is occurring, the blood count is declining, and various internal tissues are becoming atrophic, no clue to these derangements is given by the external appearance of the mice. About the fifth or sixth day following exposure a few of the mice may begin to appear lethargic with ruffled fur and a generally unkempt appearance. By the eighth day a few of the mice may be dead. Daily mortality increases to a peak between the 10th and 14th day then gradually subsides. After the 20th day deaths are infrequent and the surviving mice show evidence of recovery from their injury. Thirty days after exposure it is impossible to tell an irradiated survivor from a normal mouse by inspection. Because of this characteristic slow timecourse of injury and recovery a longer observation period is used in radiation studies than is commonly used in studies of response to drugs. A 30-day observation period for evaluating the acute lethal response of mice to radiation exposure is widely used.