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首页> 外文期刊>Radiotherapy and oncology: Journal of the European Society for Therapeutic Radiology and Oncology >A 'Red Shell' concept of increased radiation damage hazard to normal tissues just outside the PTV target volume.
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A 'Red Shell' concept of increased radiation damage hazard to normal tissues just outside the PTV target volume.

机译:“红壳”概念增加了对PTV目标体积之外的正常组织的辐射损害危险。

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摘要

To the Editor,New methods of radiation dose delivery - SBRT, Cyberknife, Protons, Tomotherapy, Rapid Arc - can deliver large doses per fraction, which includes a zone or shell of potentially damaged tissue just outside the PTV, before the dose has fallen to a low enough dose to be regarded as "safe" for normal tissues. Doses prescribed as 3 × 20 Gy, 4×15 Gy or 5 × 12 Gy deliver EQDs at the PTV border of 275,216 or 180 Gy EQD, respectively which are 2-4 times greater doses than any known to be tolerable to normal tissues. [EQP means equivalent dose in 2 Cy fractions, assuming alpha/beta = 3 Gy for late complications]. It may be many mm outside the PTV before these doses fall to the 70 or 80 Gy EQD, or less, that are known to be tolerable, with volume limitation, from conventional radiotherapy experience.
机译:对编辑而言,新的辐射剂量传输方法-SBRT,射波刀,质子,断层疗法,快速电弧-可以在剂量下降至之前的每部分中传输大剂量,其中包括PTV外部可能受损组织的区域或外壳。足够低的剂量被认为对正常组织是“安全的”。规定为3×20 Gy,4×15 Gy或5×12 Gy的剂量在275,216或180 Gy EQD的PTV边界处递送EQD,分别比已知的对正常组织可耐受的剂量大2-4倍。 [EQP表示等效剂量,以2 Cy分数表示,假定晚期并发症的alpha / beta = 3 Gy]。在这些剂量下降到70 Gy EQD或80 Gy EQD或更小之前,在PTV外面可能有许多毫米,这是已知的,并且受常规放射治疗经验的限制。

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