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American Journal of Roentgenology, Vol 102, 46-52, Copyright © 1968 by American Roentgen Ray Society

RADIATION SENSITIVITY OF SPLEEN CELLS IRRADIATED IN VITRO AND IN VIVO

YOSH MARUYAMA 1, JOHN G. EICHTEN 2, and J. MANTHE 3

1 Associate Professor of Radiology
2 Summer Medical Student Research Trainee
3 From the Department of Radiology, Division of Radiotherapy, University of Minnesota, Minneapolis, Minnesota

X-irradiation survival response by colony-forming ability was determined for mouse spleen cells. Cells irradiated in vitro or in vivo differed in their radiosensitivity and cells irradiated in vivo were less sensitive than cells irradiated in vitro. The differences appeared to be due to a difference in the slope or D0 of the survival curve. D0 in vivo was 109 rad, and in vitro was 91 rad. Oxygen breathing did not alter radioresponse. The extrapolation of cell radioresponse observed in vitro to the in vivo situation may be limited under certain circumstances.


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Copyright © 1968 by the American Roentgen Ray Society.