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公开(公告)号：EP2368139A2
公开(公告)日：2011-09-28
申请号：EP09764091.6
申请日：2009-11-20
IPC分类号： G01T1/24
CPC分类号： G01T1/24
摘要： The application describes an X-ray detector for use in a medical equipment, wherein the detector comprises an unit for transforming X-ray radiation into electrical charge, a first capacitor for being charged by an electrical charge, wherein the first capacitor is electrically connected to the unit for transforming, a second capacitor for being charged by an electrical charge, and a first gain switching gate, wherein the second capacitor is electrically connected with the unit for transforming if the first gain switching gate is in on-state, wherein the detector is adapted to switch on the first gain switching gate for short periods. Further the application describes an X-ray system comprising a detector according to the invention, wherein the system is adapted for gain selection, wherein the detector is adapted to switch on the first gain switching gate for short periods. Further, the application describes a method for using a detector according to the inventive concept, wherein the first gain switching gate is switched on only for short periods of time for redistribution of electrical charge between the first capacitor and the second capacitor.
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公开(公告)号：EP1616407B1
公开(公告)日：2008-02-06
申请号：EP04725132.7
申请日：2004-04-01
发明人： PEETZ, Jörg , EFE, Yusuf , HABETHA, Jörg , MAY, Klaus Peter , WISCHHUSEN, Olaf
CPC分类号： H04W92/02 , H04W52/0216 , H04W52/0219 , H04W52/0222 , H04W88/16 , Y02D70/142 , Y02D70/144 , Y02D70/22
摘要： The present invention relates to the connection of subnets which operate on different frequency channels and are connected by wireless forwarder stations. According to the present invention, a forwarding station periodically switches to the other frequency channel to remain there for a pre-defined presence duration, whereby jitters of the presence time caused by overlapping packet transmissions are compensated. According to the present invention, a presence and absence time of the forwarder station in the respective subnet is indicated by using signals relating to a power saving mechanism.
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4.发明授权Method and apparatuses for location and access right dependent access control 有权的方法和设备进行本地和访问控制zugriffsrechtabhaengige
公开(公告)号：EP1750573B1
公开(公告)日：2011-04-27
申请号：EP05733993.9
申请日：2005-05-09
CPC分类号： G06F19/3418 , A61B5/0002 , G06F19/00 , H04L63/105 , H04L63/107 , H04M3/38 , H04M2242/30 , H04W4/02 , H04W12/10 , H04W48/04
摘要： The present invention relates to wireless control of resources of a network and to wireless control of medical devices. The invention provides location dependent access to network resources on the basis of user identification, distance between mobile device and network resource as well as distance between several mobile devices. Wireless access control further refers to various levels of access of a plurality of differently authorized users. Depending on the mutual distance between differently authorized users, access rights of a high level authorized user can be dynamically transferred to a low level authorized user. The invention therefore provides location dependent inheritance of access rights between users of mobile devices of a network environment.
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公开(公告)号：EP1750573A1
公开(公告)日：2007-02-14
申请号：EP05733993.9
申请日：2005-05-09
IPC分类号： A61B5/00
CPC分类号： G06F19/3418 , A61B5/0002 , G06F19/00 , H04L63/105 , H04L63/107 , H04M3/38 , H04M2242/30 , H04W4/02 , H04W12/10 , H04W48/04
摘要： The present invention relates to wireless control of resources of a network and to wireless control of medical devices. The invention provides location dependent access to network resources on the basis of user identification, distance between mobile device and network resource as well as distance between several mobile devices. Wireless access control further refers to various levels of access of a plurality of differently authorized users. Depending on the mutual distance between differently authorized users, access rights of a high level authorized user can be dynamically transferred to a low level authorized user. The invention therefore provides location dependent inheritance of access rights between users of mobile devices of a network environment.
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6.发明公开SYSTEMS AND METHODS FOR SCANNING AND DATA ACQUISITION IN COMPUTED TOMOGRAPHY (CT) APPLICATIONS 审中-公开系统和方法在计算机断层扫描和数据采集（CT）
公开(公告)号：EP1959835A2
公开(公告)日：2008-08-27
申请号：EP06821097.0
申请日：2006-09-16
发明人： LEWALTER, Astrid , PIETIG, Rainer , ZEITLER, Guenter , ECK, Kai , HERRMANN, Christoph , KIEWITT, Rainer , LOEF, Christoph , MUELHENS, Oliver , RIBBING, Carolina , MATTHIAS, Simon , WISCHHUSEN, Olaf , ROSE, Georg
IPC分类号： A61B6/03
CPC分类号： A61B6/032 , A61B6/027 , A61B6/4021 , A61B6/503 , A61B6/504 , H01J2235/086 , H05G1/52
摘要： Systems and methods for data acquisition in computed tomography (CT) applications are provided. The systems and methods are particularly adapted for scanning and acquiring/processing data in connection with high-power cone-beam CT applications. The electron beam is moved/scanned along the anode surface to multiple focal positions. Data acquisition for a full projection at one focus position and one view angle is achieved by activating each focus position multiple times during the data acquisition for one angle of the gantry. The detector array and associated data processing system are adapted to rapidly switch between the different focus positions during the acquisitions for one view angle and to collect all data belonging to the same projection into the same data set. Adaptive electron optics are utilized to move/scan the electron beam along the anode surface to the various focus positions. Alternatively, a plurality of cathodes may be provided for respective focus positions and the system may support fast switching therebetween to achieve desirably short spot times. The disclosed CT system permits greater power densities without risk of heat damage to the anode and effectively increases the track velocity of the electron beam on the anode surface. The CT system and associated data acquisition methods have particular utility in CT applications requiring increased time resolution and/or spatial resolution, e.g., cardiac CT applications.
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公开(公告)号：EP1616407A2
公开(公告)日：2006-01-18
申请号：EP04725132.7
申请日：2004-04-01
发明人： PEETZ, Jörg , EFE, Yusuf , HABETHA, Jörg , MAY, Klaus Peter , WISCHHUSEN, Olaf
CPC分类号： H04W92/02 , H04W52/0216 , H04W52/0219 , H04W52/0222 , H04W88/16 , Y02D70/142 , Y02D70/144 , Y02D70/22
摘要： The present invention relates to the connection of subnets which operate on different frequency channels and are connected by wireless forwarder stations. According to the present invention, a forwarding station periodically switches to the other frequency channel to remain there for a pre-defined presence duration, whereby jitters of the presence time caused by overlapping packet transmissions are compensated. According to the present invention, a presence and absence time of the forwarder station in the respective subnet is indicated by using signals relating to a power saving mechanism.
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8.发明授权
公开(公告)号：EP1959835B1
公开(公告)日：2018-11-14
申请号：EP06821097.0
申请日：2006-09-16
发明人： LEWALTER, Astrid , PIETIG, Rainer , ZEITLER, Guenter , ECK, Kai , HERRMANN, Christoph , KIEWITT, Rainer , LOEF, Christoph , MUELHENS, Oliver , RIBBING, Carolina , MATTHIAS, Simon , WISCHHUSEN, Olaf , ROSE, Georg
CPC分类号： A61B6/032 , A61B6/027 , A61B6/4021 , A61B6/503 , A61B6/504 , H01J2235/086 , H05G1/52
摘要： Systems and methods for data acquisition in computed tomography (CT) applications are provided. The systems and methods are particularly adapted for scanning and acquiring/processing data in connection with high-power cone-beam CT applications. The electron beam is moved/scanned along the anode surface to multiple focal positions. Data acquisition for a full projection at one focus position and one view angle is achieved by activating each focus position multiple times during the data acquisition for one angle of the gantry. The detector array and associated data processing system are adapted to rapidly switch between the different focus positions during the acquisitions for one view angle and to collect all data belonging to the same projection into the same data set. Adaptive electron optics are utilized to move/scan the electron beam along the anode surface to the various focus positions. Alternatively, a plurality of cathodes may be provided for respective focus positions and the system may support fast switching therebetween to achieve desirably short spot times. The disclosed CT system permits greater power densities without risk of heat damage to the anode and effectively increases the track velocity of the electron beam on the anode surface. The CT system and associated data acquisition methods have particular utility in CT applications requiring increased time resolution and/or spatial resolution, e.g., cardiac CT applications.
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公开(公告)号：EP1735956A1
公开(公告)日：2006-12-27
申请号：EP05718593.6
申请日：2005-03-30
摘要： Mobile devices (12
1 , 12
2 ,..., 12
n ) are handed off in overlapping cells (18
1 , 18
2 ,..., 18
n ) by tracking a velocity (speed and direction) of movement of any number of the mobile devices (12
1 , 12
2 ,..., 12
n ). Access points (14
1 , 14
2 ,..., 14
n ) are each located in an associated operational cell (18
1 , 18
2 ,..., 18
n ) and each operates at a dedicated frequency. The initial signal strengths are measured in advance at predefined locations within a defined space (16) to define signal strengths as location map (42). A nearby initial access point (typically the nearest) and at least two nearby (typically next nearest) access points are assigned for one of the mobile devices (12
1 , 12
2 ,..., 12
n ), and the frequencies of each access point identified. A tracking processor (50) periodically scans the frequencies of the nearby access points to determine the location velocity of the mobile device and predict when a handoff will be appropriate. E.g., the actual signal strength measurements between the mobile device and the nearby access points are collected and analyzed to determine a proper time for a handoff of one or more of the nearby access points.-
公开(公告)号：EP1735956B1
公开(公告)日：2011-07-06
申请号：EP05718593.6
申请日：2005-03-30
IPC分类号： H04W36/32
摘要： Mobile devices (12
1 , 12
2 ,..., 12
n ) are handed off in overlapping cells (18
1 , 18
2 ,..., 18
n ) by tracking a velocity (speed and direction) of movement of any number of the mobile devices (12
1 , 12
2 ,..., 12
n ). Access points (14
1 , 14
2 ,..., 14
n ) are each located in an associated operational cell (18
1 , 18
2 ,..., 18
n ) and each operates at a dedicated frequency. The initial signal strengths are measured in advance at predefined locations within a defined space (16) to define signal strengths as location map (42). A nearby initial access point (typically the nearest) and at least two nearby (typically next nearest) access points are assigned for one of the mobile devices (12
1 , 12
2 ,..., 12
n ), and the frequencies of each access point identified. A tracking processor (50) periodically scans the frequencies of the nearby access points to determine the location velocity of the mobile device and predict when a handoff will be appropriate. E.g., the actual signal strength measurements between the mobile device and the nearby access points are collected and analyzed to determine a proper time for a handoff of one or more of the nearby access points.
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