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胸部CT的正常解剖结构湖南省人民医院呼吸内科柳威trachea↑RBMLBMLULB1B1aB1biiiαβαβB2←B2aB2bB2aiiiβB2aiαB1biii↑B3←abiαβ→B3b←iii→←B3biα→βαβ←中间段支气管B4B5→B4aB4bB5a→→B5b←B6←←c↓biibiiaii基底支B7B8+9+10←↑B7bB9B7aB8B10↑↑B8aB8b↓iii↓↑B9aB9b←↑↑ai→aiiB10a←↑B10bB10c→←bibii→←biαβ→←LLLLUL↓↑B1+2B3B3aB3b+c↑←←B1+2a+bc→↑B1+2abcii→→→aiaiibiibi→→aiaiiαbiαB1+2biβB1+2aiiβ→biiαbiiβ→B1+2aiβB1+2aiα←→B3aB3aiB3aiiB3b+c→→B3bB3c←←B4aB4bB5→→B6aB6biB6bii→B6c↑B6ciB6cii←←基底支→B7+8B8+9↓↓B7+8aB7+8b→→B7+8aiB7+8aiiB7+8b→→B7+8aiiB7+8aiαB7+8aiβB9bB9a↓↓B7+8bB10B10a→B10bB10ciiB10ci→