论述闪光光源有效光强的测量方法及原理，并详细介绍我所自行研制的闪光有效光强测定仪。
The measuring method and principle of efficient intensity of flash source are described, and a flash efficient intensity tester is introduced in detail.
结论根据患者特点调控激光强度、照射方向、范围、次数是防止出血、穿孔和远期狭窄的有效手段。
Conclusion It is an effective method for adjusting the strength, direction, range and frequency of laser to prevent bleeding, perforation and long term urethral stricture.
结果表明，血卟啉的荧光强度和单态氧的量子产额较高，它们均为有效的光敏剂。
The results indicate that the laser fluorescence intensity and the singlet oxygen quantum yield of hematoporphyrin are better than others and they may be effective photosensitizers.
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