California Code, Health and Safety Code - HSC § 115061

(a) In order to better protect the public and radiation workers from unnecessary exposure to radiation and to reduce the occurrence of misdiagnosis, the Radiologic Health Branch within the State Department of Health Services shall adopt regulations that require personnel and facilities using radiation-producing equipment for medical and dental purposes to maintain and implement medical and dental quality assurance standards that protect the public health and safety by reducing unnecessary exposure to ionizing radiation while ensuring that images are of diagnostic quality. The standards shall require quality assurance tests to be performed on all radiation-producing equipment used for medical and dental purposes.

(b) The Radiologic Health Branch shall adopt the regulations described in subdivision (a) and provide the regulations to the health committees of the Assembly and the Senate on or before January 1, 2008.

(c) For purposes of this section, “medical and dental quality assurance” means the detection of a change in X-ray and ancillary equipment that adversely affects the quality of films or images and the radiation dose to the patients, and the correction of this change.