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首页> 外文期刊>Radiotherapy and oncology: Journal of the European Society for Therapeutic Radiology and Oncology >A comparison of multileaf collimator with conformal blocks for the boost phase of dose-escalated conformal prostate radiotherapy.
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A comparison of multileaf collimator with conformal blocks for the boost phase of dose-escalated conformal prostate radiotherapy.

机译:多叶准直器与保形阻滞剂在剂量递增保形前列腺放射治疗的增强阶段的比较。

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摘要

A multileaf collimator (MLC) is compared with conformal blocks for delivering the boost phase of dose-escalated conformal prostate radiotherapy. When using conformal blocks, the volume of rectum irradiated to 90% (V90) is lower (1.4+/-1.3%, 1 SD) for a three-field plan with gantry angles 0 degree, 90 degrees, 270 degrees than for a six-field plan with gantry angles 50 degrees, 90 degrees, 130 degrees, 230 degrees, 270 degrees, 310 degrees (2.1 +/- 1.3%, P = 0.002). However, when using an MLC in which the leaves and wedge are oriented at right angles, V90 is higher (4.7 +/- 3.0%) for a three-field plan than for a six-field plan (2.7 +/- 1.6%, P=0.05). The larger increase in V90 for the three-field plan when changing from conformal blocks to MLC is mainly due to the limitation imposed upon the MLC orientation by the use of wedges.
机译:将多叶准直仪(MLC)与保形块进行比较,以提供剂量递增的保形前列腺放射治疗的增强阶段。当使用保形块时,龙门角度为0度,90度,270度的三视野平面图,经直肠照射到90%(V90)的体积较小(1.4 +/- 1.3%,1 SD)机架平面角为50度,90度,130度,230度,270度,310度的野外平面图(2.1 +/- 1.3%,P = 0.002)。但是,当使用叶子和楔形物成直角定向的MLC时,三场计划的V90(6.7 +/- 3.0%)高于六场计划(2.7 +/- 1.6%), P = 0.05)。从保形块更改为MLC时,三场计划V90的较大增加主要是由于使用楔块限制了MLC方向。

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