The Fleischner Society is a multidisciplinary medical organization that focuses on improving clinical practice in pulmonary medicine. The society was founded in 1969 and consists of radiologists, pulmonologists, and other medical professionals who are interested in chest imaging and its applications in diagnosis and patient care. The Fleischner Society is renowned for its guidelines and recommendations on the use of chest imaging techniques, such as chest X-rays and CT scans, in the diagnosis and management of various pulmonary diseases. Members of the society collaborate to review and update these guidelines regularly, ensuring that they are evidence-based and reflect the latest advancements in the field. Overall, the Fleischner Society plays a critical role in advancing the field of pulmonary imaging and facilitating communication and collaboration among medical professionals involved in the diagnosis and treatment of pulmonary diseases.