1. Noun. A contrast medium composed of a suspension of thorium dioxide ¹
¹ Source: wiktionary.com
Medical Definition of Thorotrast
1. Previously used contrast agent, accumulated in RE system, liver, spleen, lymph nodes, thorium emits alpha particles, associated with: hepatobiliary carcinoma, leukaemia, aplastic anaemia, dense liver and spleen, bone within a bone
(12 Dec 1998)
