Abdominal and thoracic scintigraphy demonstrating hydrothorax in a peritoneal dialysis patient

(A) At 30 minutes, no thoracic activity is noted. At four hours (B), there is focal accumulation of activity at the level of dome of right diaphragm as well as less intense focus just above the level of the right diaphragm medially (arrows). Imaging at 20 hours (C) post-dialysate exchange reveals further accumulation of activity medially just above the right diaphragm, as well as a slight degree of diffuse activity on the right hemithorax (arrows), d (diaphragm).