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Semilog plot of tumor regression in EL4 and S180 tumors after 8 Gy single-dose irradiation. The tumor volume (cc) in logarithmic scale (ordinate) is plotted against days (abscissa) after radiation. The unirradiated EL4 (EL4 0 Gy) and S180 (S180 0 Gy) controls show exponential growth. EL4 lymphoma is more radiation sensitive with a complete regression, while S180 sarcoma is less radio-sensitive which slightly shrank after radiation and relapsed at 13th day.
