About Zwanger-Pesiri Radiology In 1953, Dr. Jerome Zwanger founded his radiology practice with the purpose of providing physicians and patients on Long Island with modern medical diagnostics in a caring and compassionate environment. His partnership with Dr. E.J. Pesiri began in 1958 and continued until July of 2001, when Dr. Pesiri retired. Dr. Zwanger continued to practice part-time until he retired in June 2008. Now for more than 55 years, the knowledgeable team of caring professionals at Zwanger-Pesiri Radiology has been dedicated to providing state of the art radiological services to their patients with a level of care unmatched in the industry.