笔者对５０例原发性肺癌选择性支气管动脉造影（ＳＢＡＧ）征象及ＢＡＩ疗效进行了分析、探讨。结果多血管型肺癌占６６％，少血管型占３２％，无血管型占２％。多血管型中未分化癌占８３．３％，腺癌占７８．６％；少血管型占７５％，无血管型疗效最差，疗效为完全缓解，部分缓解者，多血管型占７３．５３％；少血管型占２６．４７％。因此对肺癌ＳＢＡＧ征象的研究，是提高ＢＡＩ疗效的重要手段之一。 The author analyzed and discussed the selective bronchial artery angiography (SBAG) signs and BAI efficacy in 50 patients with primary lung cancer. Results 66% of patients had multivessel type of lung cancer, 32% had less vessel type, and 2% had no vessel type. 83.3% of undifferentiated cancers were multivascular, and adenocarcinomas accounted for 78.6%; 75% of them were small vessels, and the worst effect was achieved with no vascular type. The efficacy was complete remission, partial remission, and multivascularity accounted for 73. 53%; small blood vessels accounted for 26.47%. Therefore, the study of SBAG signs in lung cancer is one of the important means to improve the efficacy of BAI.