��зν�ڻ��Ƿΰ�ǰ��

“�ҵ��0.2 �� 0.3 ��0.8��ֵ��Ӱ��￴ҽ��˵�Ƿβ��ڡ�ʲô�ǽ�ڣ��н�ڣ�Ҫ��ô�죿��Ž�ڣ��Ƿ�ΰ�ĩ��ˣ�”——ժ��

ʲô�Ƿν��

�ν��Ҫ��ָ��ʵ��ڵ��෢ֱ��3�M��Բ�λ��Բ�ν��Ӱ��ֱ��С��2�M�Ľ�ڶ��ΪС��ڣ�ֱ��С��5�M�Ľ�ڳ�Ϊ΢С��ڡ�ͨ��ڽ��X��Զϲ��ʱ��ⷢ�֡�

��ʵ��ν�ڲ��õͼ��CT��ɸ�飬100��50��50��зǸƻ��ν�ڣ��Щ��ֵĽ�ڣ��Ǻ�΢С�Ľ�ڣ��5mm��µĽ��, ��Ե��ͻ��󽵵ͣ� 100��ֻ��20��

�ν�ھ��Ƿΰ��

��й��ΰ��Ƿ��ߣ��Ҳ��ߵİ�֢��ͼ��CT��һ�ֳ��ɸ��ΰ��ļ��취��зΰ��߷��յ��Ⱥ��ǳ��ּ�顣

�ܶ��CT��浥��һ��ַβ�С��ڣ��Ϳ�ʼ��Լ��ǻ��˷ΰ��ʼ��þ��ʧ�롣��ʵ��β��ڲ��ö��Ƿΰ��

��ڷν�ڻ��߶��ԣ�ֻ�Ƿΰ��ķ��ԱȽϸߣ��ʵҲ��ֻ��2%��ҵ��˵÷ΰ��㣺100��ڵ��ˣ��96��Ƿΰ��ȷʵҲ��ģ��󲿷ֽ��Ϊ��֢��˸�Ⱦ��ԭ��ġ�

��ԣ��ֻ��CTɨ��Ľ��ֱ��Ϊ��֢��һ��ǲ�רҵ�ġ��£��׵��Ҫ��һ��רҵ��ҽԺ��ҽ��Ρ�

�ٴ��϶��ڷβ��ڵĴ��ҽʦԭ��ϻ��ʷ��ڴ�С��״��ȶ�֮ǰ��X��Զϲ��жϡ��ںܶ��£��ڽ��̫С��ҽ��Ὠ��۲졢��á��õ�Ƶ��ȡ��ھ��£�Ҳ��ǰ��ꡣ

һ��0.5��£�׷�ٹ۲졢�ݲ��

0.5��0.7��֣��ɽ�һ��׷�ٹ۲�ͺá�

0.7��ϣ��Ӧ��һ��鼰��ơ�

�ν��Ƿ��Ƿΰ��Ҫ��

��Ȼ�󲿷ֽ�ڶ��Ƿΰ��Ϊɶ��Ҫ��ͼ��CTɸ�飿��һ��Ҫ��ȷ��ͼ��CTֻ�Ƿΰ�ɸ��һ�ְ취��ڵ��ǲ��Ƿΰ��ϸ��˵��Ҫ��в��ȷ�

��ԣ��ͼ��CTɸ��Ȼ��Ⱥܸߣ��Ϊ�󲿷ֽ�ڶ��Ƿΰ��˵�Ǽ��Ժܸߣ��ȷ��Ҳ�ܸߣ��ǳ��׸��ߴ��ǡ�

��Ȼ��ˣ�Ϊʲô��Ҫ��ɸ��أ��Ȼ��Ϊ��ٷΰ��ʰ��2011�꡶ ��Ӣ��־��Ϸ��һ��о��棬ͨ��5��˵�3��ɸ��Ƚϣ��ȵ͵�X��Ƭ��Ƚϣ��ͼ��CT��԰ѷΰ��ʽ��20% ��

��ʵĽ��ͣ��ڵͼ��CT�ܽ��ΰ��ڣ��ʱ��е��ƣ��Ի��Ч��Ч��ֻ��Ի��

��ܰ��ʾ����Ǹ��ˡ��߼��ʷ��ѣ��ν�ڣ��Ҫ��Ŀ��Խϴ�Ҫ��һ��ļ�顣��⣬�ν��Խ��Ŀ��ҲԽ��

������зν�ڻ��Ƿΰ�ǰ����