Expands the definition of "radiologic technologist" to include a radiologist assistant.

Requests the secretary of health to issue a certificate to any applicant who demonstrates to the secretary's satisfaction, that certain requirements have been met to practice as a radiologist assistant.

Declares that it is unprofessional conduct under chapter 18.130 RCW for any person registered or certified under this act to interpret images, make diagnoses, prescribe medications or therapies, or perform other procedures prohibited by rule.