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公开(公告)号：DE10228941A1
公开(公告)日：2004-01-15
申请号：DE10228941
申请日：2002-06-28
Applicant: PHILIPS INTELLECTUAL PROPERTY
Inventor： SCHLOMKA JENS-PETER , HARDING GEOFFREY
Abstract: The invention relates to a computed tomography apparatus (CT apparatus) for imaging by means of radiation having traversed an object to be examined (that is, directly transmitted radiation), as well as by means of radiation scattered by the object to be examined, which apparatus includes a radiation source (S), a detector arrangement (16) and a device whereby the radiation (41a) having traversed the object to be examined can be blocked at least to an extent that the intensity incident on the detector arrangement (16) does not substantially exceed the intensity of radiation (41b) scattered by the object (13) to be examined and incident on the detector arrangement (16). The invention enables the detection of scattered radiation (CSCT mode) which is not affected by crosstalk from the transmitted radiation, even when the detector arrangement does not satisfy severe requirements as regards crosstalk properties and/or is configured as a single-row detector arrangement.
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公开(公告)号：DE59912786D1
公开(公告)日：2005-12-22
申请号：DE59912786
申请日：1999-05-07
Applicant: PHILIPS INTELLECTUAL PROPERTY
Inventor： HARDING GEOFFREY
Abstract: The X-ray radiator has an electron source (3) for emitting electrons. It also has a target which emits X-ray beams when struck by electrons. The target is made of a liquid metal e.g. mercury which circulates e.g. by means of a pump, in the operating state of the emitter. A window (2) is disposed between the electron source and the target. Electrons pass through the window and the window is cooled by the circulating liquid metal.
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公开(公告)号：DE50208680D1
公开(公告)日：2006-12-28
申请号：DE50208680
申请日：2002-06-17
Inventor： HARDING GEOFFREY , SCHLOMKA JENS-PETER
Abstract: A liquid metal (9) is arranged as an x-ray target such that it flows past an electron impact zone (8). A pressure medium (11) is provided in a pressure region (10) that is separate from the liquid metal region (7), and exerts a pressure on the liquid metal (9) in the fluid metal region to drive it past the electron impact zone (8). The pressure region includes a rechargeable pressure accumulator (R3) for applying the pressure. Independent claims are also included for an x-ray emitter, and an x-ray apparatus.
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公开(公告)号：DE60302445D1
公开(公告)日：2005-12-29
申请号：DE60302445
申请日：2003-02-19
Applicant: PHILIPS INTELLECTUAL PROPERTY
Inventor： HARDING GEOFFREY , DOORMANN VOLKER , DAVID BERND
Abstract: A device for generating X-rays having a source for emitting electrons accommodated in a vacuum space, a liquid metal for emitting X-rays as a result of the incidence of electrons, and a pump for causing a flow of the liquid metal through a constriction where the electrons emitted by the source impinge upon the liquid metal, the constriction having a cross-sectional area which, seen in a flow direction, increases so that during operation in the flow direction, a decrease of a flow velocity takes place such that a decrease of a pressure of the liquid metal in the constriction, caused by viscous flow losses, substantially corresponds with an increase of the pressure caused by the decrease of the velocity so that a uniform and relatively low mechanical load is exerted on a window separating the constriction from the vacuum space during operation.
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公开(公告)号：DE50107672D1
公开(公告)日：2005-11-17
申请号：DE50107672
申请日：2001-12-06
Inventor： HARDING GEOFFREY , ULMER BERND , DAVID BERND
Abstract: The liquid metal target flows through the conductive part (51) in operational state. The conductive part is formed by a first conductive section, containing the window and forming the conductive path for the liquid metal target, and a second conductive section as a coolant path. The second section is so secured on the first section that the region of effect of the electron beam on it is cooled. Preferably the two sections lie in a plane orthogonal to impingement direction of the electron beam and at an angle of 90 degrees.
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Patent Agency Ranking
公开(公告)号：DE4445876B4
公开(公告)日：2005-08-04
申请号：DE4445876
申请日：1994-12-22
Applicant: PHILIPS INTELLECTUAL PROPERTY
Inventor： HARDING GEOFFREY
IPC: G01N23/201 , G21K1/02 , G01N23/20 , G01T1/36
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公开(公告)号：DE60230387D1
公开(公告)日：2009-01-29
申请号：DE60230387
申请日：2002-01-30
Inventor： HARDING GEOFFREY , DAVID BERND , SCHLOMKA JENS P , TIELEMANS LEONARDUS P , POTZE WILLEM
Abstract: The invention relates to a device ( 1 ) for generating X-rays ( 57 ). The device comprises a source ( 7 ) for emitting electrons ( 53 ) and a liquid metal for emitting X-rays as a result of the incidence of electrons. The device further comprises a displacing member ( 11 ) for displacing the liquid metal through an impingement position ( 55 ) where the electrons emitted by the source impinge upon the liquid metal. As a result of the flow of liquid metal through the impingement position the heat, which is generated in the impingement position as a result of the incidence of the electrons upon the liquid metal, is transported away from the impingement position. According to the invention, the displacing member ( 11 ) has a contact surface ( 61 ), which is in contact with the liquid metal in the impingement position ( 55 ), and a driving member ( 31 ) for moving the contact surface in a direction which, in the impingement position, is substantially parallel to the contact surface. Thus the flow of liquid metal in the impingement position is achieved as a result of viscous shear forces in the liquid metal caused by friction forces between the liquid metal and the moving contact surface. As a result, the necessary pressure of the liquid metal is limited.
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公开(公告)号：DE602004016320D1
公开(公告)日：2008-10-16
申请号：DE602004016320
申请日：2004-05-12
Applicant: PHILIPS INTELLECTUAL PROPERTY
Inventor： HARDING GEOFFREY , DAVID BERND R
Abstract: The present invention relates to an X-ray source for the generation of fluorescent X-rays. The X-ray source is realized by an electron source for the emission of electrons and a target which emits X-rays in response to the incidence of the electrons, the target comprising a ring-shaped primary target for the emission of primary X-rays in response to the incidence of the electrons and a secondary target for the emission of fluorescent X-rays in response to the incidence of the primary X-rays. To obtain an enhanced radiance, it is proposed that the primary target comprises a liquid metal channel arranged in a radial direction relative to a central axis, and that a liquid metal circulates in the liquid metal channel during operation of the X-ray source in the radial direction from an inner side to an outer side of the ring-shaped primary target.
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公开(公告)号：DE60302445T2
公开(公告)日：2006-08-03
申请号：DE60302445
申请日：2003-02-19
Inventor： HARDING GEOFFREY , DOORMANN VOLKER , DAVID BERND
Abstract: A device for generating X-rays having a source for emitting electrons accommodated in a vacuum space, a liquid metal for emitting X-rays as a result of the incidence of electrons, and a pump for causing a flow of the liquid metal through a constriction where the electrons emitted by the source impinge upon the liquid metal, the constriction having a cross-sectional area which, seen in a flow direction, increases so that during operation in the flow direction, a decrease of a flow velocity takes place such that a decrease of a pressure of the liquid metal in the constriction, caused by viscous flow losses, substantially corresponds with an increase of the pressure caused by the decrease of the velocity so that a uniform and relatively low mechanical load is exerted on a window separating the constriction from the vacuum space during operation.
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公开(公告)号：WO2004002316A8
公开(公告)日：2004-12-23
申请号：PCT/IB0302904
申请日：2003-06-19
Applicant: PHILIPS INTELLECTUAL PROPERTY , KONINKL PHILIPS ELECTRONICS NV , SCHLOMKA JENS-PETER , HARDING GEOFFREY
Inventor： SCHLOMKA JENS-PETER , HARDING GEOFFREY
CPC classification number: A61B6/032 , A61B6/027 , A61B6/06 , A61B6/4291 , A61B6/4417 , A61B6/483
Abstract: The invention relates to a computed tomography apparatus (CT apparatus) for imaging by means of radiation having traversed an object to be examined (that is, directly transmitted radiation), as well as by means of radiation scattered by the object to be examined, which apparatus includes a radiation source (S), a detector arrangement (16) and a device whereby the radiation (41a) having traversed the object to be examined can be blocked at least to an extent that the intensity incident on the detector arrangement (16) does not substantially exceed the intensity of radiation (41b) scattered by the object (13) to be examined and incident on the detector arrangement (16). The invention enables the detection of scattered radiation (CSCT mode) which is not affected by crosstalk from the transmitted radiation, even when the detector arrangement does not satisfy severe requirements as regards crosstalk properties and/or is configured as a single-row detector arrangement.
Abstract translation: 本发明涉及用于借助于已经穿过待检查对象（即，直接透过的辐射）的辐射进行成像的计算机断层摄影设备（CT设备），以及借助于待检查对象散射的辐射进行成像 装置包括辐射源（S），检测器装置（16）和装置，借此可以将已经横过待检查对象的辐射（41a）至少阻挡到入射在检测器装置（16）上的强度的程度， 基本上不超过被检查对象（13）散射并入射到检测器装置（16）上的辐射（41b）的强度。 即使当检测器装置不满足关于串扰特性的严格要求和/或被配置为单行检测器装置时，本发明也能够检测不受来自发射辐射的串扰影响的散射辐射（CSCT模式）。
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