1. Survey of CT practice in Japan and collective effective dose estimation;Nishizawa;Nippon Acta Radiol,2004
2. Determinations of organ or tissue doses and collective effective dose equivalent from diagnostic x-ray examinations in Japan;Maruyama;Radiat Prot Dosimetry,1992
3. Cancer risks attributable to low doses of ionizing radiation: assessing what we really know;Brenner;PNAS,2003
4. International Commission on Radiological Protection: Recommendations of the ICRP Publication 26. Oxford: Pergamon Press; 1977.
5. Nationwide survey of dental radiographic examination and estimation of collective effective dose in Japan, 1999;Iwai;Dent Radiol,2005