Kheonkaew, B., Wichatorntrakul, W., Mairiang, E., Awikhunprasert, P. and Nikapruek, K. 2014. The assessment of exposure index on the posterior-anterior computed radiography chest in Srinagarind Hospital, Khon Kaen University. Journal of Associated Medical Sciences. 47, 1 (Jan. 2014), 23.