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Treatment parameters affecting the response of normal brain to photodynamic therapy

机译:影响正常大脑对光动力疗法反应的治疗参数

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Abstract: Different aspects of photodynamic therapy in normal rat brain tissue have been studied, in an effort to understand and improve the dosimetry of this new modality in treatment of brain tumors. dosimetry parameters, including light energy dose, fluence rate and beam size, and drug dosage were studied. PDT induced lesion depth in brain was measured as a biological endpoint. Effective attenuation depth and absolute light fluence rate distribution under superficial irradiation were measured using invasive optical probes. Photosensitizer uptake was quantified using HPLC analysis. The results indicate that normal brain have a high intrinsic sensitivity to PDT treatment, based on the estimated photodynamic threshold.!6
机译:摘要:已经研究了正常大鼠脑组织中光动力疗法的不同方面,以期了解和改进这种新形式治疗脑肿瘤的剂量学。研究了剂量学参数,包括光能剂量,通量率和束大小以及药物剂量。测量PDT在脑中引起的病变深度作为生物学终点。使用侵入式光学探针测量在浅辐射下的有效衰减深度和绝对光通量率分布。使用HPLC分析定量光敏剂吸收。结果表明,根据估算的光动力学阈值,正常大脑对PDT治疗具有很高的内在敏感性!6

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