As used in subsection (c) of § 19a-14 and sections 20-74aa to 20-74cc, inclusive, and 20-74ee:

(1) “Commissioner” means the Commissioner of Public Health.

(2) “Department” means the Department of Public Health.

(3) “Medical x-ray system” means an x-ray system designed for the irradiation of any part of the human body for diagnostic or therapeutic purposes.