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A New Technique for Improving Visualization of Mucosal Lesions During Endoscopic Photodynamic Therapy

机译：内镜光动力疗法中改善粘膜病变可视化的新技术

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A new device consisting of a conventional fiberscope and a new TV system (model OTV-S5,Olympus Optical Co., Tokyo, Japan) has been developed to achieve accurate irradiation oflaser light in photodynamic therapy for gastric cancer. This model has high resolution andsensitivity, and its signal can be transmitted by red, green and blue. In front of the CCD weinserted a special interference filter which has specific absorption of red light with 2.3%transmissivity at a 630 nm wavelength and a 50 nm absorption band of full width at halfmaximum. The average transmittance in the visible region, except for at 630 nm, was 90%.A neutral density filter with 16% transmittance was added to adjust to the sensitivity of theCCD. The device makes it possible to perform accurate irradiation, because we can observeboth the lesion and the laser spot on a monitor in original colors during irradiation.
机译：为了在胃癌的光动力疗法中实现激光的准确照射，已经开发了由传统的纤维镜和新的电视系统组成的新设备（型号为OTV-S5，日本东京奥林巴斯光学公司）。该模型具有很高的分辨率和灵敏度，其信号可以通过红色，绿色和蓝色进行传输。在CCD的前面插入了一个特殊的干涉滤光片，该滤光片在630 nm波长处具有2.3％透射率的红光的特定吸收率，在最大最大宽度的一半处具有50 nm的吸收带。除了在630nm处，可见光区域的平均透射率为90％。添加了具有16％透射率的中性密度滤光片以调节CCD的灵敏度。该设备使进行精确的照射成为可能，因为我们可以在照射过程中以原始颜色在监视器上观察病变和激光点。

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