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公开(公告)号：US4075484A
公开(公告)日：1978-02-21
申请号：US705051
申请日：1976-07-14
CPC分类号： H05G1/26 , A61B6/032 , G01T1/1644 , Y10S378/901
摘要： A device for correcting measuring values of a group of radiation detectors for measuring the intensity or distribution of radiation, comprising an additional radiation source for direct irradiation of the detectors. The radiation of the said additional radiation source can be switched on each time when the radiation to be measured is not incident on the radiation detectors. The device furthermore comprises a calculating device which forms for each radiation detector the quotient of the measuring value (M1(x)) and the reference measuring value (M2(x)) of the radiaton detectors when exposed to the radiation of the additional radiation source.
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公开(公告)号：US4417353A
公开(公告)日：1983-11-22
申请号：US756856
申请日：1977-01-05
申请人： Gunther Groh , Hermann Weiss , Wolfgang Wagner , Klaus Pasedach , Gunter Kowalski , Dietrich Meyer-Ebrecht
发明人： Gunther Groh , Hermann Weiss , Wolfgang Wagner , Klaus Pasedach , Gunter Kowalski , Dietrich Meyer-Ebrecht
CPC分类号： A61B6/032
摘要： In fan beam X-ray scanners operating with a large number of detectors, errors at and near the center of rotation are caused by the fact that the radiation absorption in said area is substantially always measured by the same detectors and that the sensitivity of all detectors is not exactly the same. The invention provides an improvement in that the measurement is carried out with a larger number of detectors than is necessary for the measurement of the scanning field and that the detectors pivot during the measurement. As a result, the absorption in the center of rotation is measured by different detectors so that, for a sufficient number of detectors the different sensitivities, errors are averaged and thus reduced or cancelled.
摘要翻译： 在使用大量检测器操作的扇形束X射线扫描仪中，旋转中心处和附近的误差是由于所述区域中的辐射吸收基本上总是由相同的检测器测量的，并且所有检测器的灵敏度 是不一样的 本发明提供了一种改进，其中使用比测量扫描场所需的更大数量的检测器进行测量，并且检测器在测量期间枢转。 结果，通过不同的检测器测量旋转中心的吸收，使得对于足够数量的检测器，不同的灵敏度，误差被平均化并因此减小或消除。
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公开(公告)号：US4546384A
公开(公告)日：1985-10-08
申请号：US355978
申请日：1982-03-08
申请人： Gunter Kowalski
发明人： Gunter Kowalski
CPC分类号： G01B15/045 , H04N7/18
摘要： The invention relates to a method for the testing of a workpiece which is moved past a stationary camera in order to record a sequence of images, the images being subsequently superposed so that the movement of the workpiece is compensated for Low-noise images of the workpiece are thus obtained.
摘要翻译： 本发明涉及一种用于测试工件的方法，该工件被移动通过固定照相机以便记录一系列图像，该图像随后被叠加，使得工件的移动被补偿工件的低噪声图像 因此得到。
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4.发明授权
公开(公告)号：US4204124A
公开(公告)日：1980-05-20
申请号：US897448
申请日：1978-04-18
申请人： Gunter Kowalski
发明人： Gunter Kowalski
CPC分类号： A61B6/032 , A61B6/4014 , A61B6/4085
摘要： A device for reconstructing the absorption distribution in a three-dimensional body. The body to be examined is imaged from two groups of radiation source positions. Each group of radiation source positions is situated on an arc of a circle around the axis of rotation, and the acrs of a circle determine the dimensions of the region in which the absorption distribution is reconstructed. The detector device is disposed between the two arcs of a circle.
摘要翻译： 一种用于重建三维体内吸收分布的装置。 待检查的身体从两组辐射源位置成像。 每组辐射源位置位于围绕旋转轴的圆弧上，圆的acrs决定了重构吸收分布的区域的尺寸。 检测器装置设置在圆的两个弧之间。
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公开(公告)号：US4413351A
公开(公告)日：1983-11-01
申请号：US248631
申请日：1981-03-27
申请人： Gunter Kowalski
发明人： Gunter Kowalski
CPC分类号： A61B6/032 , Y10S378/901
摘要： A computer tomography device which comprises means in at least a part of its detector array (5), for forming a difference measurement value between each pair of adjacent detectors which is proportional to the difference of the non-amplified detector output signals. At least one detector of this part is additionally connected to further means (14) which produce an absolute measurement value which is proportional to its detector output signal. Adding means add the difference measurement values to the absolute measurement value.
摘要翻译： 一种计算机断层摄影装置，其包括在其检测器阵列（5）的至少一部分中的装置，用于在每一对相邻检测器之间形成与所述未放大的检测器输出信号的差成比例的差值测量值。 该部分的至少一个检测器另外连接到产生与其检测器输出信号成比例的绝对测量值的另外的装置（14）。 添加方式将差分测量值添加到绝对测量值。
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公开(公告)号：US4499540A
公开(公告)日：1985-02-12
申请号：US362019
申请日：1982-03-25
申请人： Gunter Kowalski
发明人： Gunter Kowalski
CPC分类号： G01N23/04
摘要： The invention relates to a device for testing a body which comprises periodic structures. The device includes an image forming device for determining measurement signals representing the periodic structures, and a further electronic device. This electronic device forms the frequency spectrum from neighboring measurement values in the direction of the periodic body structures, suppresses the fundamental and higher harmonics (G,B.sub.1,B.sub.3) of the periodic structures in the relevant spectrum, and retransforms the spectrums thus modified for application to an image evaluation device.
摘要翻译： 本发明涉及一种用于测试包括周期性结构的身体的装置。 该装置包括用于确定表示周期性结构的测量信号的图像形成装置和另一电子装置。 该电子装置在周期性体结构的方向上形成来自相邻测量值的频谱，抑制相关频谱中的周期结构的基波和高次谐波（G，B1，B3），并重新形成如此修改的频谱 到图像评估装置。
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公开(公告)号：US4149259A
公开(公告)日：1979-04-10
申请号：US905378
申请日：1978-05-12
申请人： Gunter Kowalski
发明人： Gunter Kowalski
IPC分类号： G01J1/42 , G01J1/00 , G01N21/17 , G06T11/00 , G11C19/00 , H03H15/00 , H03H17/06 , G06F15/34 , G01T1/161 , H03K7/00
CPC分类号： G06T11/005 , G01J1/00 , G11C19/00 , H03H15/00 , H03H17/06 , Y10S378/901
摘要： A device for reconstruction of the absorption values in a layer of a body from measured values taken along strips in the body is disclosed. The absorption values are obtained from the measured values by an analog or a digital device, using a transversal filter in which the measured values are assigned weighting factors in accordance with predetermined criterion.
摘要翻译： 公开了一种用于根据沿着身体中的条带测量的值重建身体层中的吸收值的装置。 通过模拟或数字装置使用横向滤波器从测量值获得吸收值，其中测量值根据预定标准被分配加权因子。
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公开(公告)号：US4097747A
公开(公告)日：1978-06-27
申请号：US761452
申请日：1977-01-21
申请人： Gunter Kowalski
发明人： Gunter Kowalski
摘要： In third-generation computer tomography apparatus measuring values must be intermediately stored partly for the total scanning time in order to enable processing of all measuring values with a given projection angle. This involves high expenditures for storage means. Moreover, the applied dose is larger than required for obtaining the measuring value per se. The invention consists in that there is provided a shield which moves with the radiator but whose direction does not change in space during the measurement, but does change relative to the radiation beam. As a result, it is achieved that all measuring values with a given projection angle can be obtained within a part of the scanning time, the said part corresponding to the ratio between the opening angle of the radiation beam and the total scanning time. As a result, the cost of intermediate storage as well as the patient dose can be reduced.
摘要翻译： 在第三代计算机断层摄影装置中，为了能够以给定的投影角度对所有测量值进行处理，必须对总扫描时间部分地中间存储测量值。 这涉及存储手段的高支出。 此外，施加的剂量大于获得测量值本身所需的剂量。
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9.发明授权Method of and apparatus for generating improved reconstruction images in computerized tomography equipment 失效用于在计算机断层摄影设备中产生改进的重建图像的方法和装置
公开(公告)号：US4314337A
公开(公告)日：1982-02-02
申请号：US27552
申请日：1979-04-06
申请人： Gunter Kowalski
发明人： Gunter Kowalski
CPC分类号： A61B6/583 , G06T11/005 , Y10S378/901
摘要： The method relates to an X-ray apparatus, which by the rotary scanning with the aid of a fan-shaped radiation beam provides measuring data about the radiation attenuation in the layer of a body, from which subsequently the absorption distribution of the layer being examined is calculated. In such an apparatus it is important that the center of rotation is accurately known. If this center is not exactly known, this leads to blurring in the reconstructed image. If scanning is not performed over a full revolution, this moreover gives rise to streaking artefacts. The method proposed automatically yields the center of rotation from the measuring data, so that during the subsequent reconstruction allowance can be made for the center of rotation.
摘要翻译： 该方法涉及一种X射线装置，其通过借助于扇形辐射束的旋转扫描提供关于身体层中的辐射衰减的测量数据，随后将检查被检测层的吸收分布 被计算。 在这种装置中，重要的是旋转中心是精确的。 如果这个中心不是完全知道的，这会导致重建图像的模糊。 如果扫描不是在一整圈进行扫描，这还会产生条纹伪像。 所提出的方法自动地从测量数据产生旋转中心，使得在随后的重建中可以对旋转中心进行补偿。
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10.发明授权Device for determining the radiation absorption distribution in a three-dimensional examination zone 失效用于确定三维检查区域中的辐射吸收分布的装置
公开(公告)号：US4309615A
公开(公告)日：1982-01-05
申请号：US158189
申请日：1980-06-11
申请人： Gunter Kowalski
发明人： Gunter Kowalski
CPC分类号： A61B6/032 , A61B6/4085 , G21K1/025 , A61B6/4021
摘要： A device for determining the radiation absorption distribution in a three-dimensional examination zone which is irradiated from different positions which are situated in one plane and in which radiation sources are present. The device comprises two detector arrays consisting of separate, adjacently arranged detectors, which are situated at a distance from and parallel to each other in a first plane and in a second plane. The device further comprises radiation sources which are situated between the two extreme planes and which are arranged to be rotate around an axis of rotation which extends transversely of said planes. The radiation sources are line-shaped and are arranged parallel to the axis of rotation and diametrically with respect to the axis of rotation opposite a detector array.
摘要翻译： 一种用于确定在位于一个平面中并且存在辐射源的不同位置的三维检查区域中的辐射吸收分布的装置。 该装置包括两个检测器阵列，该检测器阵列由分开的，相邻布置的检测器组成，它们在第一平面和第二平面中彼此距离并且彼此平行。 该装置还包括辐射源，辐射源位于两个极端平面之间，并且被布置为围绕横向于所述平面延伸的旋转轴线旋转。 辐射源是线形的，并且平行于旋转轴线并且相对于与检测器阵列相对的旋转轴线径向地布置。
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