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1 Associate Professor, Department of Radiation Therapy, University of Alberta; and Senior Radiotherapist, Dr. W. W. Cross Cancer Institute, Edmonton, Alberta, Canada.
A semicontinuous line source system of radium application to carcinoma of the cervix uteri easily matched to external beam therapy is described. It seems to have no disadvantage over the Manchester system, but has the significant advantage of lower incidence of vaginal occlusion. The importance of this complication in early cases is stressed.
The system employs built-in rectal protection and permanently loaded radiation sources. The dosage to rectum is controlled and the hazards to personnel are reduced to a minimum. The apparatus is durable and readily cold sterilized. It is equally suitable for use with cesium 137, in which case personnel hazard can be further reduced.
The present status of the colpostatic principle is discussed and the serious significance of persistent low back pain is stressed.
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