1. Food and Drug Administration. Diagnostic x-ray systems and their major components. 1984; United States FDA Code of Federal Regulations, 21 CFR 1020.33, US Nuclear Regulatory Commission, US Govt. (Washington DC: FDA).
2. International Electrotechnical Commission. International Standard. Medical Electrical Equipment–Part 2–44: Particular Requirements for the Safety of X-ray Equipment for Computed Tomography. 2009; IEC 60601–2–44 Ed3 Amendment 1. (Geneva, Switzerland: IEC).
3. International Commission on Radiological Protection. The 2007 Recommendations of the International Commission on Radiological Protection. Ann ICRP. 37 (2–4) 2007; ICRP Publication no. 103.
4. McCollough CH, Leng S, Yu L, Cody DD, Boone JM, McNitt-Gray MF (2011) CT dose index and patient dose: they are not the same thing. Radiology 259:311–316. https://doi.org/10.1148/radiol.11101800
5. American Association of Physicists in Medicine. Size-Specific Dose Estimates (SSDE) in Pediatric and Adult Body CT Examinations. AAPM Task Group 204 2011; AAPM Report no. 204.