Three randomized trials conducted by the UK's Medical Research Council (MRC) have assessed fractionation of intrathoracic radiotherapy for palliation.

英国医学研究委员会 (MRC) 进行三项随机试验评估了胸腔内放射治疗次姑息治疗效果。

Conventional fractionation and accelerated hypofractionation are thought to be equivalent, but hypofractionation involves fewer visits, is more convenient for patients and requires fewer resources.

传统和加速被认为是等效，但需就诊次数，对患者来说方便并且需资源。

Compared with conventional fractionation at a dose of 60Gy in 30 fractions, it has demonstrated superior local control (23% vs 16%) and 5-year OS (30% vs 21%).

与 30 次 60Gy 剂量传统相比，它表现出优异局部控制（23% vs 16%）和 5 年 OS（30% vs 21%）。

They raised 80 bean plants, infested 40 of them with aphids two weeks after germination, and then, three days later, tested samples of the hydroponic solution of each using a process called bioassay-guided fractionation.

他们培育了 80 株豆类植物， 在发芽两周后用蚜虫感染了其中 40 株，然后在三天后， 使用称为生物测定引导馏过程测试了每株植物水培溶液样本。