Radiation focused from a source outside the body is called external beam radiation.

射线聚焦来自体外称作外射线术的放射源。

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This paper describes the structure and work principle of a miniature and self-shielding electron-beam radiation processing system.

介绍了一种小型化自屏蔽电子束辐照装置的结构方案设计和工作原理。

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It is necessary for calculating the solar beam radiation on the tilted mirror or aperture for designing of solar thermal utilization.

在聚光太阳能热利用设计时，有必要计算聚光装置倾斜镜面或孔径表面的太阳直接辐射。

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External beam radiation involves zapping a patient with high-dose X rays generated by a machine called a linear accelerator.

FORBES: Men, Cancer & Hope

Or you can pick your poison, choosing between surgery to remove the prostate and one of two forms of radiation, external beam radiation and radioactive "seeds" implanted in the gland itself.

FORBES: Men, Cancer, & Hope

It involves timing the radiation beam to the diastole, when the heart is resting between beats.

CNN: Heart test can pack radioactive wallop