公开(公告)号：US20050121617A1

公开(公告)日：2005-06-09

申请号：US11006758

申请日：2004-12-08

申请人： Bjoern Heismann ,  Thomas Reichel

发明人： Bjoern Heismann ,  Thomas Reichel

IPC分类号： G01T1/20 ,  A61B6/03 ,  G01T1/17 ,  G01T1/24 ,  G01T1/29 ,  H01L27/14 ,  H01L31/09 ,  H04N5/32

CPC分类号： G01T1/2928

摘要： A radiation detector and a method are for synchronized radiation detection. The radiation detector has a two-dimensional arrangement of radiation sensors using APS technology, and evaluation electronics with an input for a synchronization signal. The evaluation electronics have two or more free-running current/frequency converters for conversion of analog signals from the radiation sensors to digital signals. A correction unit is also provided for correction of errors in the digital signals which are caused by time discrepancies in a nominal time period, which is predetermined by the synchronization signal, for detection of the radiation from conversion events of the free-running current/frequency converters. The radiation detector can be produced at low cost, and allows simplified and scalable modular construction.

摘要翻译： 辐射检测器和方法用于同步辐射检测。 辐射检测器具有使用APS技术的辐射传感器的二维布置，以及具有用于同步信号的输入的评估电子装置。 评估电子设备具有两个或多个自由运行的电流/频率转换器，用于将模拟信号从辐射传感器转换为数字信号。 还提供了一种校正单元，用于校正数字信号中由于同步信号预定的标称时间段中的时间差异引起的错误，用于检测自由运行电流/频率的转换事件的辐射 转换器。 辐射检测器可以低成本生产，并允许简化和可扩展的模块化构造。

公开(公告)号：US09829553B2

公开(公告)日：2017-11-28

申请号：US13857311

申请日：2013-04-05

申请人： David Grodzki ,  Bjoern Heismann ,  Jeanette Lenger ,  Sebastian Schmidt

发明人： David Grodzki ,  Bjoern Heismann ,  Jeanette Lenger ,  Sebastian Schmidt

IPC分类号： G01R33/54 ,  G01R33/48 ,  G01R33/561

CPC分类号： G01R33/4806 ,  G01R33/4816 ,  G01R33/54 ,  G01R33/5619

摘要： In a method and a magnetic resonance (MR) system for functional MR imaging of a predetermined volume segment of THE brain of a living examination subject, an RF excitation pulse is radiated into the subject and at least one magnetic field gradient is activated, and MR data of the predetermined volume segment is acquired beginning at a predetermined echo time after the RF excitation pulse. The echo time is in a time period of 10 μs to 1000 μs.

公开(公告)号：US20130267827A1

公开(公告)日：2013-10-10

申请号：US13857322

申请日：2013-04-05

申请人： David Grodzki ,  Bjoern Heismann ,  Jeanette Lenger ,  Sebastian Schmidt

发明人： David Grodzki ,  Bjoern Heismann ,  Jeanette Lenger ,  Sebastian Schmidt

IPC分类号： A61B5/04 ,  A61B5/0476 ,  A61B5/00

CPC分类号： A61B5/04012 ,  A61B5/0042 ,  A61B5/0476 ,  A61B5/048 ,  A61B5/055 ,  A61B5/7264

摘要： In a method and a magnetic resonance (MR) system for functional MR imaging of a predetermined volume segment of the brain of a living examination subject, MR data of the predetermined volume segment are acquired, EEG data of the examination subject are acquired with the acquisition of the EEG data taking place simultaneously with the acquisition of the MR data, and the MR data automatically evaluated dependent on the acquired EEG data.

摘要翻译： 在用于生活检查对象的脑的预定体积段的功能MR成像的方法和磁共振（MR）系统中，获取预定体积段的MR数据，通过采集获取检查对象的EEG数据 的EEG数据与采集MR数据同时发生，MR数据根据所获得的EEG数据自动评估。

公开(公告)号：US20110255752A1

公开(公告)日：2011-10-20

申请号：US13086596

申请日：2011-04-14

申请人： Bjoern Heismann

发明人： Bjoern Heismann

IPC分类号： G06K9/00

CPC分类号： G06F19/321 ,  G06T7/11 ,  G06T2207/10072 ,  G06T2207/20104 ,  G06T2207/30004

摘要： In an evaluation method and device for evaluation of medical image data, a pre-selection step is implemented for a manual pre-selection of the medical image data and a selection step is implemented for manual selection of relevant image regions in the pre-selected medical image data. Information for the selection of relevant image regions is provided in a manner that is at least partially computer-controlled in the preparation step.

摘要翻译： 在用于医学图像数据的评价的评价方法和装置中，实施用于手动预选医学图像数据的预选步骤，并且执行选择步骤，用于手动选择预选医疗中的相关图像区域 图像数据。 用于选择相关图像区域的信息以在准备步骤中被至少部分计算机控制的方式提供。

公开(公告)号：US20090039562A1

公开(公告)日：2009-02-12

申请号：US12285055

申请日：2008-09-29

申请人： Andreas Freund ,  Bjoern Heismann ,  Harald Maerkl ,  Martin Schaefer ,  Thomas Von Der Haar

发明人： Andreas Freund ,  Bjoern Heismann ,  Harald Maerkl ,  Martin Schaefer ,  Thomas Von Der Haar

IPC分类号： B29C35/08

CPC分类号： G21K1/025 ,  A61B6/4258

摘要： A method is proposed for producing an anti-scatter grid or collimator for a radiation type, which is formed from at least one base body of prescribable geometry having transmission channels or slits for primary radiation of the radiation type which extend between two opposite surfaces of the base body. The base body is formed from a structural material that strongly absorbs the radiation type, either using the injection molding technique or by way of the technique of stereolithography. The method can be used to produce an anti-scatter grid or collimator with high accuracy and with the aid of only a few steps.

摘要翻译： 提出了一种用于制造用于辐射型的防散射栅格或准直器的方法，该方法由至少一个具有规定几何形状的基体形成，其具有用于在辐射类型的两个相对表面之间延伸的辐射类型的主辐射的传输通道或狭缝 基体 该基体由强力吸收辐射型的结构材料形成，使用注塑技术或通过立体光刻技术。 该方法可用于以高精度和仅仅几步的帮助产生抗散射网格或准直仪。

公开(公告)号：US20050123090A1

公开(公告)日：2005-06-09

申请号：US11006772

申请日：2004-12-08

申请人： Bjoern Heismann ,  Silke Janssen ,  Thomas Haar

发明人： Bjoern Heismann ,  Silke Janssen ,  Thomas Haar

IPC分类号： G01T1/17 ,  A61B6/00 ,  A61B6/03 ,  G21K1/12

CPC分类号： G01T1/171 ,  A61B6/032 ,  A61B6/583 ,  A61B6/585

摘要： A method is for operation of a counting radiation detector, in particular of a counting X-ray detector, with improved linearity, in which each detector element of the counting radiation detector supplies counting pulses at counting rates as a function of a number of radiation quanta which occur per unit time during operation. In the method, the counting rates which are supplied from each detector element or from subsections of the detector element are converted via a functional relationship to actual counting rates or are multiplied by correction factors which are dependent on the magnitude of the counting rates. The correction factors are determined in advance for the respective detector element or for the subsections of it, and any discrepancy (which occurs as a result of a dead time of the detector element, for example) in the counting rates is corrected from the actual number of radiation quanta which arrive per unit time. The method allows the linearity of counting radiation detectors to be improved, particularly at high radiation intensities, so that the linearity condition for X-ray CT systems is also satisfied.

摘要翻译： 一种用于操作计数辐射检测器，特别是具有改进的线性度的计数X射线检测器的方法，其中计数辐射检测器的每个检测器元件以计数速率提供计数脉冲，作为辐射量子数的函数 其在操作期间每单位时间发生。 在该方法中，从检测器元件或检测器元件的子部分提供的计数率通过功能关系转换为实际计数率，或乘以与计数率的大小有关的校正因子。 对于各个检测器元件或其子部分预先确定校正因子，并且从实际数量校正在计数率中的任何差异（例如，作为检测器元件的死区时间发生的差异） 的辐射量子单位时间到达。 该方法允许改善计数辐射检测器的线性度，特别是在高辐射强度下，使得X射线CT系统的线性度条件也得到满足。

公开(公告)号：US20050098735A1

公开(公告)日：2005-05-12

申请号：US10981464

申请日：2004-11-05

申请人： Bjoern Heismann

发明人： Bjoern Heismann

IPC分类号： G01T1/24 ,  A61B6/03 ,  G01N23/04 ,  G01N23/06 ,  G01T1/161 ,  G01T1/164 ,  G01T1/166 ,  G01T1/17 ,  G01T1/29 ,  H01L31/09

CPC分类号： G01T1/1611 ,  A61B6/037 ,  G01T1/17 ,  G01T1/2985

摘要： A detector module is for CT and/or PET and/or SPECT examinations, and includes a number of measuring channels. Each measuring channel includes a direct converter for directly converting incident measuring radiation into analog electric signals, a pulse generator connected to the direct converter, for generating counting pulses as a function of the received electric signals, and a counting device that counts the received counting pulses over a prescribable time period and outputs the result. Arranged between the counting device and the pulse generator is an externally drivable changeover unit that can be used to switch over between the counting device and an event detector that registers and outputs for each received counting pulse the time and the associated measuring channel or an item of location information assigned to this measuring channel. The present detector module is of simple design.

摘要翻译： 检测器模块用于CT和/或PET和/或SPECT检查，并且包括多个测量通道。 每个测量通道包括用于将入射测量辐射直接转换成模拟电信号的直接转换器，连接到直接转换器的脉冲发生器，用于产生作为接收到的电信号的函数的计数脉冲;以及计数装置，对接收的计数脉冲进行计数 在规定的时间段内输出结果。 在计数装置和脉冲发生器之间布置的是外部驱动的转换单元，其可以用于在计数装置和事件检测器之间切换，所述事件检测器为每个接收的计数脉冲注册和输出时间和相关的测量通道或一个 分配给该测量通道的位置信息。 本检测器模块设计简单。

公开(公告)号：US09057770B2

公开(公告)日：2015-06-16

申请号：US13537413

申请日：2012-06-29

申请人： Bjoern Heismann ,  Sebastian Schmidt

发明人： Bjoern Heismann ,  Sebastian Schmidt

IPC分类号： G01V3/00 ,  G01R33/48 ,  G01R33/56

CPC分类号： G01R33/4824 ,  G01R33/48 ,  G01R33/4816 ,  G01R33/56

摘要： In a method for recording a magnetic resonance image with a magnetic resonance device, in which several projection image data records are recorded in succession with different gradient orientations, from which, through back projection, the magnetic resonance image is reconstructed, the recording of a projection data record in a recording time frame proceeds with a temporal frequency modulated excitation pulse of a pulse duration, wherein, through the frequency modulation of the excitation pulse, all spins to be recorded within the scope of the projection data record are excited in a temporal sequence and wherein the frequency modulation function describing the frequency modulation during the pulse duration exhibits at least one maximum and/or at least one minimum. During the excitation duration, a time-resolved reception signal is detected. The projection data record is determined from the reception signal through evaluation.

摘要翻译： 在用磁共振装置记录磁共振图像的方法中，其中以不同的梯度取向连续地记录多个投影图像数据记录，通过背投影重建磁共振图像，记录投影 在记录时间帧中的数据记录是以脉冲持续时间的时间频率调制激励脉冲进行的，其中，通过激励脉冲的频率调制，将在时间序列中激发要记录在投影数据记录范围内的所有旋转 并且其中描述所述脉冲持续时间期间的频率调制的所述频率调制函数具有至少一个最大值和/或至少一个最小值。 在激励期间，检测时间分辨的接收信号。 通过评估从接收信号确定投影数据记录。

公开(公告)号：US08779771B2

公开(公告)日：2014-07-15

申请号：US13213253

申请日：2011-08-19

申请人： Bjoern Heismann ,  Sebastian Schmidt ,  Markus Vester ,  Anke Weissenborn

发明人： Bjoern Heismann ,  Sebastian Schmidt ,  Markus Vester ,  Anke Weissenborn

IPC分类号： G01V3/00

CPC分类号： A61B5/055 ,  A61B5/0263 ,  A61B5/4064

摘要： In a magnetic resonance marking system marking a flowing medium in a marking region, as well as in a magnetic resonance system with such a magnetic resonance marking system, a method to control a magnetic resonance marking system, and a method to generate magnetic resonance exposures, a radio-frequency transmission device generates marking radio-frequency signals, and a marking radio-frequency transmission coil emits the marking radio-frequency signals in the marking region. A magnetic field determination device determines a magnetic field strength in the marking region, and a control unit derives a marking transmission frequency from the determined magnetic field strength and to control the radio-frequency transmission device so that marking radio-frequency signals at the derived marking transmission frequency are emitted by the marking radio-frequency transmission coil.

摘要翻译： 在标记区域中的流动介质的磁共振标记系统中，以及在具有这种磁共振标记系统的磁共振系统中，控制磁共振标记系统的方法和产生磁共振曝光的方法， 射频发送装置生成标记射频信号，标记射频发送线圈在标记区域发出标记射频信号。 磁场确定装置确定标记区域中的磁场强度，并且控制单元从确定的磁场强度导出标记传输频率，并且控制射频传输装置，从而在导出的标记处标记射频信号 传输频率由标记射频发射线圈发射。

公开(公告)号：US20130101198A1

公开(公告)日：2013-04-25

申请号：US13656932

申请日：2012-10-22

申请人： David Grodzki ,  Bjoern Heismann

发明人： David Grodzki ,  Bjoern Heismann

IPC分类号： G06K9/00

CPC分类号： A61K48/00 ,  A61B5/055 ,  A61B5/7203 ,  G01R33/48 ,  G01R33/4816 ,  G01R33/565 ,  G06F17/16

摘要： In a method and apparatus for the correction of artifacts in magnetic resonance images (MR) acquired with an MR pulse sequence in which gradients are switched simultaneously during the radiation of at least one non-selective excitation pulse, measurement data acquired with the pulse sequence in k-space are loaded into a processor, in which a perturbation matrix is determined on the basis of spatial and k-space point data of the acquired measurement data and the gradients used during the excitation. A corrected image is calculated from the acquired measurement data in k-space and the perturbation matrix, with the calculation of the corrected image including a matrix inversion of the perturbation matrix. The corrected image is then stored or displayed.

摘要翻译： 在用于在至少一个非选择性激励脉冲的辐射期间同时切换梯度的MR脉冲序列获取的磁共振图像（MR）中的伪影的校正方法和装置中，以脉冲序列获取的测量数据 k空间被加载到处理器中，其中基于所获取的测量数据的空间和k空间点数据以及在激励期间使用的梯度来确定扰动矩阵。 根据所获取的k空间测量数据和扰动矩阵计算校正图像，校正图像的计算包括扰动矩阵的矩阵求逆。 然后存储或显示校正后的图像。