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The Use of ^99mTc-Sulfur Colloid to Assess the Distribution of ³²P-Chromic Phosphate

University of Minnesota Hospitals, Minneapolis, Minnesota

Correspondence: For reprints contact: Timothy E. Tully, Div. of Nuclear Medicine, University Hospitals, Box 382, Mayo Memorial Bldg., Minneapolis, Minn. 55455.

ABSTRACT

The use of ³²P-chromic phosphate in glucose suspension for intracavitary radiotherapy is complicated by the fact that the distribution of the particulate suspension after installation is unknown. The simultaneous administration of ^99mTc-sulfur coiloid with the radiopharmaceutical followed by imaging of the appropriate cavity will depict accurately the distribution of the injected colloid. If one assumes that the two agents initially will occupy the same space and are distributed in a similar fashion, an estimation of the distribution of chromic phosphate is possible.