公开(公告)号：EP2142943A2

公开(公告)日：2010-01-13

申请号：EP08737890.7

申请日：2008-04-17

申请人： Koninklijke Philips Electronics N.V.

发明人： POORTER, Tiemen

IPC分类号： G01T1/20

CPC分类号： G01T1/2018

摘要： Detector with a partially transparent scintillator substrate According to an exemplary embodiment of the present invention, a flat detector is provided in which an opaque layer between a transparent substrate and a CsI scintillator is arranged. This layer is made partially transparent by opening many small holes in the opaque layer with for example a pulsed laser. This allows for the application of light to the inside of the front end of the flat detector through the opaque layer.

公开(公告)号：EP2262428B1

公开(公告)日：2012-01-25

申请号：EP09727905.3

申请日：2009-03-26

申请人： Koninklijke Philips Electronics N.V.

发明人： POORTER, Tiemen

IPC分类号： A61B6/02

CPC分类号： A61B6/502 ,  A61B6/025 ,  A61B6/032 ,  A61B6/4021 ,  A61B6/4085 ,  A61B6/466

摘要： The present invention generally refers to computed tomography (CT) based imaging systems and, more particularly, to a fast 3D tomosynthesis scanner apparatus and CT-based method without focal spot motion during continuous tube movement around an object of interest (O) or tissue region (M) to be examined (herein also referred to as "object"), which may advantageously be used in cone-beam volume CT mammography imaging so as to avoid motion artifacts and blurring effects. According to the present invention, said 3D tomosynthesis scanner apparatus is adapted to perform a rotational step-and-shoot image acquisition procedure for acquiring a set of 2D projection images during a continuous rotational movement of an X-ray tube (101) in an azi- muthal direction (+φ ) along an arc segment of a circular trajectory when rotating around said object (O, M) and subjecting these 2D projection images to a 3D reconstruction procedure. According to the present invention, it is foreseen that, during the image acquisition time for each 2D projection image, the focal spot on the X-ray tube's anode is moved in an opposite direction (-φ ) from a start position (bs) to an end position (be) with respect to the rotary X-ray tube's housing such that the azimuthal path distance (Ab) covered by the X-ray tube (101) due to the continuous rotational tube movement during this time is compensated. The 3D tomosynthesis scanner further comprises a mechanism for switching the focal spot on the X-ray tube's anode back to its start position (bs) with respect to said tube housing before starting a new image acquisition process for acquiring image data of a next 2D projection image. The superposition of the focal spot movement with respect to the tube housing and the continuous rotational movement of the X-ray tube (101) along said arc segment results in a stationary focal spot position relative to the object (O, M) and a stationary X-ray detector (104) diametrically oppositely arranged to the X-ray tube (101) with respect to said object (O) for each of the individual 2D projection images.

公开(公告)号：EP2223306B1

公开(公告)日：2011-08-03

申请号：EP08852007.7

申请日：2008-11-17

申请人： Koninklijke Philips Electronics N.V.

发明人： HOORNAERT, Bart, P.A.J. ,  WISSINK, Getty ,  POORTER, Tiemen

IPC分类号： G21K1/00

CPC分类号： G21K1/00

摘要： The invention relates to a radiation detector (3) comprising a detector array (5) having a periodical pattern of detector elements (51). Each detector element (51) comprises a sensor element (53) for converting incident radiation into an electrical charge. The sensor elements (53) are spaced at a sensor-center-to-center distance. Over the detector array (5) an imaging radiation-collimating structure (7) is disposed. The imaging radiation-collimating structure has a periodical pattern of radiation absorbing elements, which radiation absorbing elements are being spaced at a collimator center-to-center distance. The radiation detector (3) comprises a combiner for generating combiner-signals from the electrical charges of the sensor elements (53) of groups of an even number of sensor elements adjacent in a direction of the periodicity of the pattern of the radiation absorbing elements. The collimator center-to- center distance is approximately equal to twice the center-to-center distance of the groups of adjacent sensor elements. The radiation detector (3) further comprises a low-pass filter for receiving the combiner-signals and suppressing components of the combiner-signals with a frequency equal to or higher than a collimator frequency corresponding to the collimator center-to-center distance, thus providing a radiation detector which is easier to manufacture than the known radiation detector and which requires a relatively low degree of precision for the positioning of the radiation absorbing elements of the imaging radiation-collimating structure without introducing visible Moire effects in the image of an object to be imaged by the detector.

摘要翻译： 本发明涉及包括具有探测器元件（51）的周期性图案的探测器阵列（5）的辐射探测器（3）。 每个探测器元件（51）包括用于将入射辐射转换成电荷的传感器元件（53）。 传感器元件（53）以传感器中心到中心的距离间隔开。 在检测器阵列（5）上设置成像辐射校准结构（7）。 成像辐射校准结构具有辐射吸收元件的周期性图案，该辐射吸收元件在准直器中心到中心的距离处间隔开。 辐射探测器（3）包括组合器，用于根据在辐射吸收元件的图案的周期性的方向上相邻的偶数个传感器元件的组的传感器元件（53）的电荷产生组合器信号。 准直器中心到中心的距离近似等于相邻传感器元件组的中心到中心距离的两倍。 辐射检测器（3）还包括低通滤波器，用于接收组合器信号并且抑制具有等于或高于与准直器中心到中心距离相对应的准直器频率的频率的组合器信号的分量，因此 提供比已知的辐射探测器更容易制造的辐射探测器，并且该辐射探测器对于成像辐射校准结构的辐射吸收元件的定位要求相对低的精度，而不会在物体图像中引入可见的莫尔效应 被探测器成像。

公开(公告)号：EP2564240A2

公开(公告)日：2013-03-06

申请号：EP11721369.4

申请日：2011-04-19

申请人： Koninklijke Philips Electronics N.V.

发明人： VERSCHUREN, Coen Adrianus ,  STEINHAUSER, Heidrun ,  POORTER, Tiemen ,  CORNELISSEN, Hugo Johan

IPC分类号： G01T1/20

CPC分类号： G01T1/2002

摘要： An X-ray detector (1) includes a light detection arrangement (3) such as a CMOS photodetector, a scintillator layer (5) such as a CsI:Tl layer, a reflector layer (9) and a light emission layer (7) interposed between the scintillator layer (5) and the reflector layer (9). The light emission layer (7) may include an OLED and may have a thickness of less than 50 μm. Thereby, a sensitivity and resolution of the X-ray detector may be improved.

公开(公告)号：EP1879500A2

公开(公告)日：2008-01-23

申请号：EP06728078.4

申请日：2006-04-28

申请人： Koninklijke Philips Electronics N.V.

发明人： POORTER, Tiemen

IPC分类号： A61B6/12

CPC分类号： A61B6/542 ,  A61B6/12

摘要： The present invention relates to an X-ray imaging apparatus and a corresponding X-ray imaging method, in particular for X-ray fluoroscopy and for an application where a characteristic feature shall be extracted from acquired X-ray images. In order to reduce the total X-ray dose to which a patient is exposed for acquiring a series of X-ray images and, nevertheless, to allow the extraction of small characteristic features with high certainty, an X-ray imaging apparatus is proposed comprising: an imaging unit comprising an X-ray source (2) and an X-ray detector (4) for forming a series of X-ray images of an object (P) including a characteristic feature, a feature extraction unit (6) for extracting said characteristic feature from said series of X-ray images, and a control unit (7) for controlling the X-ray dose to which the object (P) is exposed for forming said series of X-ray images by controlling said X-ray source (2) such that the X-ray dose per X-ray image is larger for a first number of images than for the remaining number of images of said series.

公开(公告)号：EP1761954A1

公开(公告)日：2007-03-14

申请号：EP05745115.5

申请日：2005-06-09

申请人： Koninklijke Philips Electronics N.V.

发明人： FRANKLIN, Anthony, R. ,  POWELL, Martin, J. ,  OVERDICK, Michael ,  NASCETTI, Augusto ,  RUETTEN, Walter ,  POORTER, Tiemen ,  ALVING, Lex

IPC分类号： H01L27/146

CPC分类号： H01L27/14658 ,  H01L27/14676

摘要： An Y-ray detector apparatus comprises an array of detector pixels arranged into a plurality of sub-arrays. The pixels in each sub-array share a common dose sensing output provided to a dose sensing output conductor which extends to a periphery of the pixel array. The dose sensing output conductor for one sub-array of pixels passes through the area occupied by another sub-array of pixels, which can lead to unwanted cross talk. The invention provides a plurality of additional screening electrodes, with a screening electrode substantially adjacent the dose sensing output conductor for each sub-array of pixels. These screening electrodes reduce cross talk between the dose sensing output and other pixel electrodes. In another arrangement, each pixel further comprises a pixel electrode for each pixel formed at an upper region of the array, and the dose sensing output conductors are formed at a lower regon of the array. An intermediate conductor layer is then provided which overlaps the dose sensing output conductors for other sub-arrays of pixels and which pass through the area occupied by the sub-array of pixels.

公开(公告)号：EP2359161A2

公开(公告)日：2011-08-24

申请号：EP09761005.9

申请日：2009-11-13

申请人： Koninklijke Philips Electronics N.V.

发明人： JORRITSMA, Jorrit ,  POORTER, Tiemen ,  LIJTEN, Gerardus, F., C., M. ,  VAN ROOSMALEN, Johannes, H., M. ,  SENS, Martinus, M. ,  GROB, Timon, R. ,  TER LAAK, Michael, J., F., M.

IPC分类号： G01T1/20

CPC分类号： G01T1/2018 ,  G01T1/00

摘要： A tiled detector assembly (1000) and a method for making a tiled radiation detector (1000) is described. The innovative feature of this method is that the xyz misalignment of the detector tiles (304, 304'), the origin of various image artifacts, can be significantly reduced by accurate sizing and alignment of the detector tiles (304, 304'). Consequently, image quality, yield and reliability of as-produced tiled radiation detectors are considerably improved.

摘要翻译： 描述了平铺检测器组件（1000）和用于制作平铺放射线检测器（1000）的方法。 该方法的创新特征是可以通过检测器瓦片（304,304'）的精确尺寸和对准来显着地减少检测器瓦片（304,304'）的xyz未对准，各种图像伪影的原点。 因此，大大提高了生产的平铺辐射探测器的图像质量，产量和可靠性。

公开(公告)号：EP2294455A2

公开(公告)日：2011-03-16

申请号：EP09769736.1

申请日：2009-06-19

申请人： Philips Intellectual Property & Standards GmbH ,  Koninklijke Philips Electronics N.V.

发明人： RUETTEN, Walter ,  ALVING, Lex ,  BUSS, Thomas, F. ,  POORTER, Tiemen ,  WOLFS, Peter, B. A.

IPC分类号： G01T1/24

CPC分类号： G01T1/24 ,  H04N5/32 ,  H04N5/3559

摘要： An x-ray detector and its pixel circuit are described, that allow to cover a large dynamic range with automatic selection of the sensitivity setting in each pixel, thus providing improved signal to noise ratio with all exposure levels. X-ray detectors are required to cover a large dynamic range. The largest exposure determines the required pixel capacitance. However, a large pixel capacitance gives a bad signal to noise ratio with small exposures e.g. in the dark parts of the image. This invention disclosure describes several approaches to provide automatic sensitivity selection in the pixels. This ensures that low signals are stored in a small capacitor or read out with a high sensitivity with corresponding good signal to noise ratio, while larger signals are stored in larger capacitors or are read out with lower sensitivity so that no information is lost.

公开(公告)号：EP1651983A2

公开(公告)日：2006-05-03

申请号：EP04736872.5

申请日：2004-06-15

申请人： Koninklijke Philips Electronics N.V.

发明人： BIJLSMA, Sipke, J. ,  SAKAI, Toru ,  POORTER, Tiemen ,  POWELL, Martin, J.

IPC分类号： G01T1/169

CPC分类号： G01T1/2018

摘要： A radiation detector comprises an electrode structure (19,4,35), a planarising layer (101) being disposed over the electrode structure and a protective stack (103,104,105) which covers the planarising layer. The planarising layer evens out substantial differences between levels of the electrode structure above the substrate on which the electrode structure is disposed. Consequently, cracks, weak spots and other defects in the protective stack are to a large extent avoided. Because the planarising layer covers essentially the entire electrode structure, practically all sources of defects, notably cracks, in the protective stack are avoided.

公开(公告)号：EP1297363A2

公开(公告)日：2003-04-02

申请号：EP01965009.2

申请日：2001-06-19

申请人： Koninklijke Philips Electronics N.V.

发明人： HEEMSTRA, Tewe, H. ,  POORTER, Tiemen

IPC分类号： G02B3/00

CPC分类号： H01J9/2273 ,  B29D11/00269 ,  G02B3/08

摘要： In the manufacturing process of colour display tubes with a dotted screen pattern, to form the screen (11), a segmented lens (3) is used for exposing the display window (4) in order to apply a structure of a black matrix layer and a layer with electroluminescent material to it. Principally, a segmented lens (3) gives rise to a phenomenon that is called facet marking; this is a result of the fact that the images of consecutive facets (12) of the lens on the screen (11) are disjunct or partly overlap, giving dark lines (42) or bright lines (44). In present day colour display tubes - especially for use as computer monitors - it is getting more and more important to reduce facet marking as far as possible. It is proposed to manufacture the segmented lens (3) according to a new process in which the mould (30) for the manufacture of said segmented lens is significantly changed. In the new process, the poles (31) for the mould (30) are stacked by placing them with cylindrical projections (36) into apertures (38) of the carrier plate (37). This prevents leaning poles (31), which result in errors in the inclination of the facets (12). This method of manufacturing the mould (30) makes it possible to decrease the facet size and significantly improve the facet marking in colour display tubes.