(1) Registrants exclusively using low power CT X-ray systems (5 kW or less) or cone-beam CT X-ray systems are exempt from the requirements of this chapter and shall comply with chapter 246-225 WAC. Cone-beam CT X-ray system is a variation of gantry-style CT X-ray system that rotates around the patient, capturing data using a cone-shaped X-ray beam. This data is used to reconstruct a three-dimensional image.

(2) Registrants using CT simulators exclusively for treatment planning purposes in conjunction with a megavoltage radiation therapy or brachytherapy is exempt from the requirements of this chapter, except that the registrant shall comply with WAC 246-226-090, 246-240-113, and chapter 246-225 WAC.