MedStar Health i. s. looking for. a. PRN. Dosimetrist. to join our. team at. Medstar. Georgetown University Hospital. . . As a. Dosimetrist. you will. design treatment plans with the aid of a treatment planning system, calculates treatment time for approved plans, handles radioactive sources during implantation and removal of interstitial implants, and prepares shielding blocks for electron treatments and. assists. in quality assurance checks of ...