The MDCB exists to promote excellence in cancer care by advancing the profession of medical dosimetry. The MDCB has therefore developed and maintains an ethical framework and formal mechanism for medical dosimetrists to gain certification and demonstrate continuing knowledge and skill. This process has been achieved through on-going collaboration with representatives from several related radiation oncology disciplines. With respect to the common goal of the health care team who strive to provide exemplary care to patients who have cancer, the concept of acknowledging the distinct abilities of the medical dosimetrist emerged and continues to define the role of the MDCB.