RETAINED THORIUM DIOXIDE MEDIA IN SEMINAL VESICULOGRAPHY

A FOLLOW-UP STUDY WITH DOSE ESTIMATES

¹ From the Department of Radiology, and Chief, Radiology Department, Atomic Bomb Casualty Commission
² From the Department of Radiology, Radiology Department, School of Medicine, Jikeikai University, Tokyo, Japan
³ From the Department of Internal Medicine, Grace-New Haven Hospital, New Haven, Connecticut
⁴ From the Atomic Bomb Casualty Commission; Japanese National Institute of Health, Professor, Department of Experimental Radiology, Faculty of Medicine, Kyushu University, Fukuoka, Japan
⁵ From the Research Institute for Nuclear Medicine and Biology, Hiroshima University, Radiology Department, Faculty of Medicine, Tokyo University, Tokyo, Japan

A brief review of the English and Japanese literature as to the past use of thorium dioxide-containing media is presented. Physical and laboratory findings including roentgenography in a follow-up study of 23 cases which received such contrast material for seminal vesiculography 12-14 years previously are also presented. Dose estimates were made for 1 patient typical of the entire group, and for another with a relatively larger residuum. Small amounts of retained contrast material were evident in all cases, but no case of neoplasia attributable to the presence of the medium was detected.

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