Summarv Carcinoma of the max 田 ary sillus extel1 ⊂is iTlto varic ) us directl 〔 >ns acc {, rding to the individuaL Olle standard dose distributbn callTlot satisfy each patient when extended int 〔, variQus dlrectiorls , Astudy was made and sub . standard 〔1c )se distributj ⊂, n pattcrns were ubtained for each direction of the extensiol1 , using a radiotherapy plannins . c 〔} mputer ( MODULEX )and 卜 ' ℃ 〔 , gamma . ray data . Extellsi 【 川 modes 圦 ・ ere classined int 〔 } 8Lypes . Ill cases for the

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... s しandard type , we used 2 evenly weighted wedge − paired portals, ひ ne : AP and another : 正 ak ・ ral oblique , with a sct dcpth 匸 ,f 4 . 5 cm , P 〔 〕rtal width : 8c 【 11 in AP and 8 cm in iateral obllqllc , Cross angle of the bealns: 75 . , Degrce ( ,f the wedge mters二 ・ 15 「 1 each , The eye balls and brain were shielded as nluch as possible . Pla!ming pattems differed accordhlg t() various types of extension . These patterns wcre used for each patie lt at the beginni[ lg 〔}nhe rudiotherapy , with the information of extensioll directi 〔 ♪11 bu 〔 without 〔 ]btaining planning CT , or compLlter processillg .