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    • 2. 发明公开
    • A Focused pinhole gamma detection device
    • Gamma-Detektionsvorrichtung mit gerichteter Lochblende
    • EP2482101A1
    • 2012-08-01
    • EP12153270.9
    • 2012-01-31
    • Milabs B.V.
    • Beekman, Frederik Johannes
    • G01T1/164
    • G01T1/1648
    • A focused pinhole gamma detection device comprises a detector sensitive to gamma-photons, a collimator (20), and an object carrier. The collimator is provided between the detector and the object space and has a plurality of pinhole systems (22-1,22-2,...). Each pinhole system has a plurality of pinholes having mutually non-parallel central lines, having a mutual distance d that is smaller than a distance d' between any of the at least two pinholes of said pinhole system on the one hand and any pinhole of any other pinhole system on the other hand and having a pinhole system field of view, that is composed of the fields of view of the plurality of pinholes of the pinhole system. In the device at least a plurality of, and preferably all, pinhole systems are constructed and arranged so as to establish a common overlap of their pinhole system fields of view, said overlap defining a focus volume, that is seen by said plurality of pinhole systems, said all pinhole systems, respectively, of the device. At least one pinhole system is arranged and constructed such that, for at least one of, and preferably each of the pinholes of said pinhole system, a portion of the focus volume is outside the field of view of said pinhole. The detection device further comprises a pinhole shutter device (25) with a control unit that is constructed and arranged to selectively switch a transmission state of at least one pinhole of at least one pinhole system between an open state and a closed state under the control of the control unit.
    • 聚焦针孔伽马检测装置包括对γ光子敏感的检测器,准直器(20)和对象载体。 准直器设置在检测器和对象空间之间,并且具有多个针孔系统(22-1,22-2,...)。 每个针孔系统具有多个具有相互不平行的中心线的针孔,其相互距离d一方面小于所述针孔系统的至少两个针孔之间的距离d',以及任何 另一方面是另一个针孔系统,并且具有针孔系统视场,其由针孔系统的多个针孔的视野组成。 在该装置中,构造和布置至少多个,优选全部的针孔系统,以便建立其针孔系统视野的共同重叠,所述重叠限定了聚焦体积,所述多个针孔系统 分别表示设备的所有针孔系统。 至少一个针孔系统被布置和构造成使得对于针孔系统的针孔中的至少一个,并且优选地,每个针孔的一部分焦点体积在所述针孔的视野之外。 所述检测装置还包括具有控制单元的针孔快门装置(25),所述控制单元被构造和布置成在开放状态和关闭状态之间选择性地切换至少一个针孔系统的至少一个针孔的传输状态, 控制单元。
    • 3. 发明公开
    • A focused pinhole gamma detection device
    • Gamma-Detektionsvorrichtung mit gerichteter Lochblende
    • EP2073039A1
    • 2009-06-24
    • EP07076118.4
    • 2007-12-21
    • Milabs B.V.
    • Beekman, Frederik Johannes
    • G01T1/164
    • G01T1/1648
    • The invention provides a gamma detection device, a collimator for use therein, and use of such a collimator or device in imaging an object. The invention is directed to pinhole imaging with high energy photons, such as 511 keV photons. In order to achieve sufficiently low pinhole knife edge penetration, the collimator uses a plurality of focused clusters of pinholes, each with a smaller opening angle, and arranged such that all the combined fields of view of the individual pinholes in all clusters provide a large central field of view with still compact dimensions of the detection device. This is made possible since the field of view of a single cluster is divided up into a number of individual fields of view.
    • 本发明提供一种伽马检测装置,用于其中的准直仪,以及使用这种准直仪或装置成像物体。 本发明涉及用高能量光子(例如511keV光子)进行针孔成像。 为了实现足够低的针孔刀刃穿透,准直器使用多个聚焦的针孔簇,每个具有较小的开口角度,并且布置成使得所有簇中的各个针孔的所有组合视场提供了大的中心 检测装置的尺寸仍然紧凑。 这是可能的,因为单个集群的视野被划分成多个单独的视野。
    • 6. 发明公开
    • A high energy radiation imaging device
    • Bildaufnahmevorrichtungfürhochenergetischer Strahlung
    • EP2360494A2
    • 2011-08-24
    • EP11154405.2
    • 2011-02-14
    • Milabs B.V.
    • Beekman, Frederik Johannes
    • G01T1/29
    • G01T1/2985A61B6/037
    • The invention provides a focused pinhole high energy radiation imaging device (1), comprising an object space (7) for receiving an object to be imaged by means of high energy radiation, and having a first axis (8) of rotational symmetry, a detector (2), having at least one detector surface and being sensitive to said high energy radiation, and extending at least partially, preferably in a complete loop, around said object space (7), and a focused pinhole collimator (3) with a focus volume (6), and provided between the at least one detector and the object space, wherein the focus volume (6) is located eccentrically with respect to said first axis (8). In this device, the average distance between collimator pinholes (4) and the focus volume (6) is smaller than for known centered devices. This increases the sensitivity and resolution of the imaging.
    • 本发明提供了一种聚焦针孔高能辐射成像装置(1),其包括用于通过高能量辐射接收待成像对象的物体空间(7),并具有旋转对称的第一轴线(8),检测器 (2),具有至少一个检测器表面并且对所述高能量辐射敏感,并且围绕所述物体空间(7)至少部分地,优选地以完整的环路延伸,并且聚焦的针孔准直器(3)具有聚焦 (6),并且设置在所述至少一个检测器和所述物体空间之间,其中所述聚焦体积(6)相对于所述第一轴线(8)偏心定位。 在该装置中,准直器针孔(4)和对焦体积(6)之间的平均距离小于已知的居中装置。 这增加了成像的灵敏度和分辨率。