Figure 34.14. Data points represent volume changes observed in tumors in animal models after irradiation.

Figure 34.14

Data points represent volume changes observed in tumors in animal models after irradiation. After an initial decrease in the volume size, tumors grow back to the original volume over a time interval referred to as the growth delay. Curve 1 is the growth of an unirradiated control tumor. Curves 2, 4, 6, and 7 represent the growth of tumors irradiated with 1,000, 2,000, 3,000, and 4,000 cGy of photons. Curves 3 and 5 represent the growth of tumors irradiated with 400 and 800 cGy of 152 MeV neutrons. Growth delay is prolonged with increasing dosage and more densely ionizing radiation, such as neutrons. Source: Barendsen and Broerse.7

From: Chapter 34, Physical and Biologic Basis of Radiation Oncology

Cover of Holland-Frei Cancer Medicine
Holland-Frei Cancer Medicine. 5th edition.
Bast RC Jr, Kufe DW, Pollock RE, et al., editors.
Hamilton (ON): BC Decker; 2000.
© 2000, BC Decker Inc.

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