Studies on optimization of radiation protection for patients in diagnostic radiology Z. WEI, X. ZONG, Z. QIANG, Q. ZHANG, Y. WU, W. LI, K. LI and L. WEI Radioprotection, 29 2 (1994) 201-212 Published online: 15 May 2009 DOI: 10.1051/radiopro/1994015