[Thoracic imaging in the diagnosis and surveillance of sarcoidosis].

Imaging is useful at all stages of management of thoracic sarcoidosis. It contributes to diagnosis, prognosis, evaluation of lesions and follow-up in the course of the disease. Chest radiography is essential in initial work-up as well as during the course of well-tolerated forms of the disease. High resolution CT and gallium-67 scintigraphy are useful in severe lung involvement and in chronic forms of sarcoidosis.