Question: Ionizing Radiation
To treat cancer tumors, 125I is encapsulated in small
titanium “seeds” and imp…
Ionizing Radiation
To treat cancer tumors, 125I is encapsulated in small
titanium “seeds” and implanted in the tumor. Discuss the
possibility of damage cased by irradiating tissue beyond the target
volume in these treatments.
a) If the tumor is approximately 1.5 cm in diameter, with the
small radioactive “seed” at its center, what fraction of the
radiation will escape the tumor surrounding the healthy tissue?
b) What fraction of the radiation will be deposited within the
tumor?
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