4Ueyama T,Kawamoto K,Yamada Y,et al.Early esophageal carcinoma:evaluation of the depth of invasion based on double contrast esophagography[J].Acta Radiologica,1998,39(2):133-137.
5Jorg F,Stephan M,Clemens H,et al.Reflective and transmissive CR scanhead technology on needle image plates[J].SPIE,2005,5745:499-510.
6Ulrich N.Status and prospects of digital detector technology for CR and DR[J].Radiation Protection Dosimetry,2005,114(1-3):32-38.
