The purpose of digital photography is to greatly decrease patient's acceptable dose, and to improve the quality of X-ray image.

实现数字化摄影的目的，就是为了在提高X线影像质量的同时，大幅降低患者的接受剂量。

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The backscatter machine "delivers an extremely low dose of ionizing radiation" with levels "below the acceptable limits, " the report stated.

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The question is whether one can find a dose that prevents thromboembolic strokes with the new generation anticoagulants at an acceptable level of bleeding.

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