Methods Using a homogeneity water equivalent rectangular phantom, the dose gradients at the interface of target volume and normal tissue was evaluated under different scatter radii.

方法采用均质水等效矩形体模，在不同散射半径条件下观察靶区和正常组织界面上的剂量梯度随散射半径的变化。

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Objective:To investigate the influence of allogeneic spleen tissue transplantation with low-dose FK506 on allograft tolerance in rats receiving orthotopic liver transplant and the related mechanism.

目的：观察小剂量FK506作用下同种脾组织移植对大鼠肝移植术后免疫耐受的影响，探讨其可能的机制。

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The impact of PET/CT on target volume delineation and dose distributions to normal lung tissue was analyzed.

分析PET/CT融合图像对肿瘤靶区勾画以及对正常肺组织照射剂量分布的影响。

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Millennium's drug, now in early human trials, homes in on prostate cancer cells and aims to obliterate them with a precise dose of toxic chemotherapy while leaving surrounding tissue untouched.

FORBES: Men, Cancer & Hope

This allows doctors to boost the dose at the core of the tumor while giving lower doses at the edges, preserving healthy tissue.

FORBES: Men, Cancer & Hope

Conventional CT scans are used to work out the shape of the place where a dose of radiation needs to be concentrated in order to attack a tumour without damaging nearby healthy tissue.

ECONOMIST: Modern X-ray technology