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公开(公告)号：US4348589A
公开(公告)日：1982-09-07
申请号：US160702
申请日：1980-06-18
申请人： Petrus N. J. Vis
发明人： Petrus N. J. Vis
摘要： A device for measuring local X-ray absorption differences in a patient or other object has an array of ionization detector elements. Each detector element has a high voltage electrode. The high voltage source for each such electrode has associated with it an alternating voltage source in order to compensate for microphonic interference. The measuring circuit includes a demodulation compensation circuit for separation of the microphonic signal and for removing this interference from the measuring signal.
摘要翻译： 用于测量患者或其他物体中的局部X射线吸收差异的装置具有电离检测器元件阵列。 每个检测器元件具有高电压电极。 每个这样的电极的高电压源与其相关联的是交流电压源，以便补偿麦克风干扰。 测量电路包括解调补偿电路，用于分离麦克风信号并从测量信号中消除干扰。
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公开(公告)号：US5060246A
公开(公告)日：1991-10-22
申请号：US354005
申请日：1989-05-19
CPC分类号： A61B6/032 , A61B6/4021
摘要： A computer tomography system includes an X-ray tube having an elongate anode across which a beam spot can be displaced, a scanogram being formed by correctly shifting the profiles measured in the various source positions with respect to one another, followed by superposition. Parts of the object which are situated in a selected layer are thus emphasized in an image, parts of the object which are situated outside the selected layer being blurred. When a point of interest in the object is determined by observation of the scanogram, the same apparatus is used to produce a tomography slice image transverse the scanogram image. An important additional advantage consists in that the permissible power to be applied to the X-ray source may be higher. Furthermore, a scanogram thus obtained is not necessarily disturbed by the failure of one or more detectors.
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公开(公告)号：US5793166A
公开(公告)日：1998-08-11
申请号：US752886
申请日：1996-11-20
摘要： An image display device (1) which includes a cathode ray tube is provided with a cathode system (2) for the emission of a plurality of electron beams (3) whereby a phosphor screen (4) is scanned in order to display an image. The electron beams are modulated on the basis of an electronic image signal by means of a cathode modulator (5). The cathode modulator is arranged to scan different image lines simultaneously by means of separate electron beams. For example, the cathode modulator comprises an extension system (7) and a delay system (8) for deriving extended and delayed extended image line sections from image line sections of the electronic image signal. The cathode modulator also comprises a combination unit (9) for simultaneously supplying an extended image line section and a delayed image line section with which separate electron beams are modulated.
摘要翻译： 包括阴极射线管的图像显示装置（1）设置有用于发射多个电子束（3）的阴极系统（2），由此扫描荧光屏（4）以便显示图像。 电子束通过阴极调制器（5）基于电子图像信号进行调制。 阴极调制器被布置成通过单独的电子束同时扫描不同的图像线。 例如，阴极调制器包括延伸系统（7）和延迟系统（8），用于从电子图像信号的图像线段导出扩展和延迟的延伸图像线段。 阴极调制器还包括用于同时提供扩展图像线部分的组合单元（9）和用于分离电子束的延迟图像线段。
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公开(公告)号：US5712538A
公开(公告)日：1998-01-27
申请号：US577459
申请日：1995-12-22
CPC分类号： H04N9/16
摘要： A phosphor screen in a display device is scanned by separate electron beams in order to generate images of different frequency content in one color in substantially the same part of the phosphor screen. The different images can be perceived as a composite image for some time. The individual electron beams can be modulated by means of a cathode modulator on the basis of a high frequency and a low frequency component of an electronic image signal or on the basis of an image component and a text component of an electronic image signal. The modulations of the individual electron beams may be slightly delayed relative to one another in order to avoid overloading of the phosphor material.
摘要翻译： 通过单独的电子束扫描显示装置中的荧光屏，以在荧光屏的基本相同的部分中产生一种颜色的不同频率含量的图像。 不同的图像可以被视为合成图像一段时间。 可以基于电子图像信号的高频和低频分量，或者基于电子图像信号的图像分量和文本分量，借助于阴极调制器来调制各个电子束。 单个电子束的调制可以相对于彼此稍微延迟，以避免荧光体材料的过载。
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