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首页> 外文会议>Photoelectronic Detection and Imaging: Technology and Applications '93 >New progress in high-performance x-ray image intensifiers
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New progress in high-performance x-ray image intensifiers

机译：高性能X射线图像增强器的新进展

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Abstract: The primary feature of x-ray image intensification is to allow a substantial reduction of the necessary x-ray dose, by offering a luminance gain of about 10$+4$/ compared to direct view fluoroscopic screens. Such a luminance gain has made possible real time video recording and display of radiological images, by optically coupling a video camera to the output of the screen of the XRII tube. However, the observable field of view of the XRII was initially limited to approximately 15 cm, and the image resolution was not as good as the resolution achievable with radiological films. Progressively, the size of XRII tubes has been increased, and modern tubes can offer useful image diameters up to 40 cm. In addition to that, the electronic zoom, introduced at the beginning of the seventies as a feature of the XRII tubes, allowed the user to achieve an observable resolution very close to that of the radiological films, but at the expense of the observable field of view. Continuously, the manufacturing technology of the most critical parts of the XRII tubes have been improved resulting, for modern tubes, in such an imaging quality that most of the radiological modalities of diagnostic are directly achievable through video observation. Furthermore, the recent progress made in electronics and image processing offers powerful means to make the best possible use of the electronically recorded radiological images. A review is made, hereafter, of the latest progresses in XRII performances and applications. !0
机译：摘要：X射线图像增强的主要特征是，与直接透视荧光屏相比，通过提供约10 $ + 4 $ /的亮度增益，可以大大减少必要的X射线剂量。通过将摄像机光学耦合到XRII管屏幕的输出，这样的亮度增益使实时视频记录和放射图像的显示成为可能。但是，XRII的可观察视野最初仅限于约15厘米，并且图像分辨率不如放射线胶片所能达到的分辨率。 XRII显像管的尺寸逐渐增加，现代的显像管可以提供高达40 cm的有用图像直径。除此之外，作为XRII显像管的功能，在70年代初引入了电子变焦，使用户能够获得与放射线胶片非常接近的可观察分辨率，但是却以牺牲X射线照相胶片的可观察范围为代价。视图。不断地，对XRII管最关键部分的制造技术进行了改进，从而导致了现代管的成像质量，从而可以通过视频观察直接实现大多数诊断的放射学方式。此外，电子和图像处理方面的最新进展提供了强有力的手段，可以最大限度地利用电子记录的放射图像。此后，将对XRII性能和应用程序的最新进展进行回顾。 ！0

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