公开(公告)号：EP1062914A1

公开(公告)日：2000-12-27

申请号：EP99939155.0

申请日：1999-02-17

申请人： Quanta Vision, Inc.

发明人： LAZAREV, Pavel Ivanovich ,  Komardin, Oleg, Valentinovich

IPC分类号： A61B6/03 ,  G01N23/02 ,  G21K1/02

CPC分类号： A61B6/483 ,  A61B6/032 ,  A61B6/06 ,  G01N23/046 ,  G01N2223/419 ,  G21K1/025 ,  G21K1/04

摘要： The invention deals with computerized tomography based on the object imaging with small angle scattered radiation. The registration of the scattering is made in ultra-small angles: from 0 to 1 degree relatively to the direction of the falling beam. Several schemes allowing to perform the registration of coherent scattering in the mentioned angles are suggested. The fan-shaped low-diverging beams formed by the collimator are directed to the object. In one of the variants of the device it is suggested to use a special spatial filter situated beyond the object for the separation of the radiation scattered on small angles; this filter represents a collimator-like structure, in which radiation-transparent areas of the collimator are overlapped by opaque areas of the filter. With this in the absence of the object the radiation does not pass on the space-sensitive detector situated beyond the filter. Being installed between the collimator and the spatial filter, the detector registers the scattering of the radiation on small angles. In order to register the radiation passed through the object in the direction of the primary beam, the detective elements are installed on opaque areas of the filter. It allows to obtain, besides a tomogram in the scattered radiation, tomographic images by the absorbed radiation. In another variant of the device the areas of the filter overlapping the transparent areas of the collimator, are made partially absorbing the radiation passed through the object along the direction of the falling beams, and decreasing it to the level of intensity of the scattered radiation. One of the suggested schemes allows to determine the object's scattering function within the limits of the primary beam. Based on the data of scattering obtained for different views of the object relatively to the system "source - collimator - detector" it is possible to restore the tomographic image of the object. 3 independent points of formulae, 9 figs.

摘要翻译： 本发明涉及基于具有小角散射辐射的物体成像的计算机断层摄影。 散射的配准以超小角度进行：相对于下落光束的方向为0至1度。 建议允许在上述角度执行相干散射的配准的几种方案。 由准直器形成的扇形低发散光束被引导到物体。 在设备的一个变型中，建议使用位于物体之外的特殊空间滤波器来分离在小角度上散射的辐射; 该过滤器表示准直器状结构，其中准直器的辐射透明区域与过滤器的不透明区域重叠。 在没有物体的情况下，辐射不会穿过位于过滤器之外的空间敏感检测器。 安装在准直器和空间滤波器之间，检测器以小角度登记辐射的散射。 为了将通过物体的辐射沿主光束的方向进行记录，检测元件安装在过滤器的不透明区域上。 除了散射辐射中的断层图像之外，还可以通过吸收的辐射获得断层图像。 在装置的另一变型中，过滤器与准直器的透明区域重叠的区域被部分地吸收沿着下落光束的方向通过物体的辐射，并将其减小到散射辐射的强度水平。 所提出的方案之一允许在主波束的极限内确定物体的散射函数。 基于相对于系统“源 - 准直器 - 检测器”对于物体的不同视图获得的散射数据，可以恢复对象的断层图像。 3个独立的公式，9个无花果。

公开(公告)号：EP1120086A1

公开(公告)日：2001-08-01

申请号：EP99946482.9

申请日：1999-09-13

申请人： Quanta Vision, Inc.

发明人： LAZAREV, Pavel Ivanovich ,  KOMARDIN, Oleg Valentinovich

IPC分类号： A61B6/02 ,  G01N23/201

CPC分类号： A61B6/502 ,  A61B6/0435 ,  A61B6/06 ,  A61B6/483 ,  G01N23/046 ,  G01N2223/419 ,  G01N2223/612 ,  G21K5/10

摘要： The invention relates to the mammography devices based on registration of a reduced-angle coherently scattered radiation when an object is rayed by a penetrating radiation. Registration of the radiation coherently scattered by an object allows to produce an image of an object in the form of distribution of its structural characteristics. The device comprises a system for forming a directed on a tested object, narrow small-divergence beams, or a beam, having the same characteristics, and a system for extracting the radiation that is coherently scattered in small angles by an object. The invention proposes versions of a device that also provide for registration of the radiation passed through an object to make allowance for its thickness so that to obviate the necessity to compress the breast. The device allows to carry out relative movements of an object and system of irradiation-registration, as well as irradiate an object at different angles and by a number of radiation sources simultaneously. The possibility to register the coherently scattered radiation in ultra-small angles within the range of several angular seconds to 0.5 degree, and also the possibility to form the primary radiation beam having a sharp boundary are provided as well.

摘要翻译： 本发明涉及当物体被穿透辐射射线时，基于减角相干散射辐射的配准的乳房摄影装置。 由对象相干散射的辐射的注册允许以其结构特征的分布的形式产生对象的图像。 该装置包括用于形成指向被测试物体的系统，具有相同特征的窄小发散光束或光束，以及用于提取由物体以小角度相干散射的辐射的系统。 本发明提出了一种设备的版本，其还提供通过物体的辐射的配准以允许其厚度，使得避免压缩乳房的必要性。 该装置允许进行照射配准的物体和系统的相对运动，以及以不同的角度和多个辐射源同时照射物体。 还提供了在几个角度至0.5度的范围内以超小角度登记相干散射的辐射的可能性，以及形成具有尖锐边界的初级辐射束的可能性。

公开(公告)号：EP0795125A1

公开(公告)日：1997-09-17

申请号：EP95942325.0

申请日：1995-11-28

申请人： Quanta Vision, Inc.

发明人： KURBATOV, Alexei Vladislavovich ,  LAZAREV, Pavel Ivanovich

IPC分类号： A61B6 ,  G01N23 ,  G21K1 ,  G21K3

CPC分类号： G01N23/046 ,  G01N2223/419

摘要： An imaging system spatially modulates penetrating radiation that passes through an object under investigation. The modulation introduces spatial irregularities which can be deflected while passing through the object under investigation. The deflection of each irregularity can be identified and is converted into contrast of a projection of the object. One embodiment of the invention includes: a source of penetrating radiation (1), and a modulator (3) for the creation of spatial irregularities; and a detector (5) for the measuring of transverse translations of spatial irregularities and converting the measured transverse translations into contrast in a projection (8) of object (4).