X线致癌的可能性

2005年高居医患关心话题第5名（美国）

这里是对医源性放射性影响进行地客观、公正的评价。

     JERRYDOCTOR 在译此文时发现，有时中文难以准确表达原文的意思，可能是我的英文不够好，也可能是我的中文不够好，或两者兼而有之。

    不过，我还知道，如果您读了很的英文原版教材后，也会发现大量诸如此类的问题。

    所以，我建议大家看我的译文时，如有疑问，就多读原文，这并不困难。而且，这样获得的知识可能更准确。

CT Remains a Powerful Tool, But ...

          Prior to engaging in any discussion of imaging and radiation risk, the first point to emphasize is that computed tomographic (CT) scanning is a powerful and indispensable diagnostic tool. CT, more than any other imaging modality, has heralded a new age of medical practice based on the ability to visualize the inner workings of the human body. This new age of medical practice is as follows: The diagnosis that you have been given as a patient, to a very large extent, and possibly completely, has been established on the basis of the imaging study that you received. That diagnosis, with the proper medical management that has stemmed from that diagnosis, may well have saved your life. In effect, medical imaging has become the modern physical exam. As part of my teaching to residents, I tell them that, after 2 weeks of experience in CT scanning, a first-year radiology resident is a better diagnostician than any of the greatest clinicians in the pre-CT era, including Sir William Osler and everyone else; medical imaging is that powerful a tool, and CT has been the modality that has most represented this new diagnostic age. Furthermore, since its initial use for the clinical evaluation of patients in the late 1970s, CT scanning has continued to evolve. The availability of a 64-plus-row multidetector CT facilitates images of extraordinary anatomical display and detail that can be rendered in perfect 3D models. For this reason, any discussion of radiation risks must also be tempered with the recognition of the benefits of CT scanning and the earnest efforts of well-meaning scientists, referring clinicians, and radiologists to improve information that the modality generates, which ultimately is intended to benefit patients.

CT仍是很有用的工具，不过……

     在讨论任何有关摄片和射线的临床风险之前，必须强调CT（计算机断层扫描成像）是一个非常有用的、不可或缺的诊断工具。CT的应用非常广泛，基于在临床中对人体的内部结构的可视化及机体工作状态的可视化，它导致一个新时代的到来。这个时代的特征如下：从获得的图像资料中分析，你可以给患者一个全面的，可能是完全的诊断。 个诊断，从芜杂的诊断中抽的正确诊断加上正确的治疗，可能会救了您的命。事实上，医疗图像已成了最现代的检验工具。在向住院医师们授课时，我告诉他们，经过二周的CT扫描经历，第一年的放射医师可以是一个好的诊断者，而此前没有CT的时候的资深临床医生却不及前者，包括William Osler也不例外。医学图像是最有用的诊断工具，CT在这个新时代最具代表意义。不仅如此，从20世纪70年代后期，CT用于临床以来，CT扫描不断进步。64＋位CT的应用推动CT到了超解剖位的显示，病变的细节可以精彩的3D方式来展现。正是这个原因，任何有关放射性风险的忧虑都应考虑CT给我们带来的获益和科学的认真善意，临床医师、放射医师籍此改善了对病情的掌握，而最终的获益者是患者。

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