Methods: The area of light s pot and the time of irradiation was adjusted according to the tumor volume,biol ogic behavior of the tumor in control group and PDT group and the survival time was observed.

• 方法 :根据肿瘤体积决定光源输出的光斑面积和计算光照射时间 ,比较PDT治疗组与荷瘤对照组的肿瘤生物学特点及荷瘤小鼠的生存期。 结果 :所有小鼠瘤细胞均成功种植 ,肿瘤体积呈对数增长 ,在局部呈浸润性生长 ;