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Clinical Comparison of ^99mTc-Labeled Preformed Phytate Colloid and Sulfur Colloid: Concise Communication

Montreal General Hospital, Montreal, Quebec, Canada

Correspondence: For reprints contact: Leonard Rosenthall, Div. of Nuclear Medicine, Montreal General Hospital, 1650 Cedar Ave., Montreal, Quebec, Canada H3G 1A4.

ABSTRACT

An in vitro preformed colloid preparation of ^99mTc-Sn-phytate was compared both qualitatively and quantitatively with a commercial ^99mTc-sulfur colloid kit in 30 patients. The degree of liver and spleen deposition of radiocolloid was, for practical purposes, the same. A slightly higher background was visually noted in 33% of the patients receiving preformed colloidal ^99mTc-Sn-phytate, but it did not interfere with the diagnostic quality of the liver and spleen images. The only advantage of the phytate compound was a preparation time of less than 5 min.