Advantages
Radiation therapy of cancers is based upon the biological response of cells to ionizing radiation. Tumor cells typically lack effective repair mechanisms, so if radiation is delivered in small sessions, a process known as fractionation, normal tissue will have time to repair itself. This repair of normal tissue means that there is a therapeutic ratio between cancer cells and normal cells.
In addition, different types of ionizing radiation will produce different effects upon cells. A comparison of neutrons with gamma radiation illustrates the differences. Both neutrons and gamma-rays are uncharged; for this reason they are referred to as indirectly ionizing radiation. The biological effect of neutrons or gamma-rays is due almost completely to the secondary electrons that they produce when they interact with a patient's tissue.
Read more about this topic: Fast Neutron Therapy
Famous quotes containing the word advantages:
“Can you conceive what it is to native-born American women citizens, accustomed to the advantages of our schools, our churches and the mingling of our social life, to ask over and over again for so simple a thing as that “we, the people,” should mean women as well as men; that our Constitution should mean exactly what it says?”
—Mary F. Eastman, U.S. suffragist. As quoted in History of Woman Suffrage, vol. 4 ch. 5, by Susan B. Anthony and Ida Husted Harper (1902)
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—Frank Pittman (20th century)
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—Leontine Young (20th century)