RecruitingEarly Phase 1Diagnostic test18F-FTHA IMAGING OF THE INTESTINAL AND CENTRAL LYMPHATIC SYSTEMThe project will be performed over a period of approximately two years. In the first year the \[18F\]FTHA tracer will be developed, optimized, and tested on normal volunteers. During the second year, the tracer will be investigated on patients with suspected obstruction of the thoracic duct (TD).