here is a comparison chart,

来源: jaydad 于 2008-12-11 21:28:08 [] [博客] [旧帖] [给我悄悄话] 本文已被阅读： 0 次 (166 bytes)
http://www.radiologyinfo.org/en/Safety/index.cfm?pg=sfty_xray&bhcp=1

i dont know how accurate it is, perhaps some radiologist on this board can verify the info

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• one side of story -foodconsumer- ♂ 给 foodconsumer 发送悄悄话 foodconsumer 的博客首页 (275 bytes) () 12/11/2008 postreply 21:34:35

• but as alway anything discussed here and else -foodconsumer- ♂ 给 foodconsumer 发送悄悄话 foodconsumer 的博客首页 (82 bytes) () 12/11/2008 postreply 21:38:27

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