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1 Instructor, the Department of Radiology, Stanford University School of Medicine, Palo Alto, California
2 Director of the Division of Radiotherapy, State University of New York, Downstate Medilcal Center, Brooklyn, New York
Lymphography provides a useful method of determining the radium dosage to any given lymph node or group of lymph nodes. It is convenient and does not depend upon measurements made at the operating table. Also, since the contribution of each source in the system is determined individually, one is able to learn the effects of different source distribution by mathematical means rather than by manipulating radium sources.
Point B is seen to be a poor indicator of lymph node dosage. The average ratio of the dose to Point B to that of the middle lymph node of the internal chain of the external iliac group was .6; to the common iliac group, .3; and to the hypogastric group, the ratio was 1. The variable, but generally low, doses delivered to the lymph nodes are in accord with what anatomic considerations would imply and are in
[See table in the PDF file]
agreement with the measurements made by others.
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