Advanced Cyclotron Systems Inc. (ACSI) is the leading manufacturer of high output cyclotrons for the international nuclear me ... dicine community. TR cyclotrons are used for the commercial production and distribution of PET and SPECT radioisotopes in internationally recognized companies. TR cyclotrons are also used in leading research facilities. The TR cyclotron series represent the newest generation of cyclotrons and are the most powerful and versatile commercial cyclotrons in the world. read more