公开(公告)号：US09664758B2

公开(公告)日：2017-05-30

申请号：US14224309

申请日：2014-03-25

申请人： Alto Stemmer

发明人： Alto Stemmer

IPC分类号： G01V3/00 ,  G01R33/48 ,  G01R33/561

CPC分类号： G01R33/4818 ,  G01R33/482 ,  G01R33/4824 ,  G01R33/5616 ,  G01R33/5618

摘要： In a method and magnetic resonance system to determine multiple magnetic resonance images for respective different echo points in time, k-space is scanned on a segment-by-segment basis with at least two rectangular k-space segments, these being scanned line by line with respective k-space lines oriented parallel to one another. A short side of the rectangular k-space segments is oriented parallel to the k-space lines. First and second gradient echoes are respectively produced by a radio-frequency pulse radiated for each k-space line.

公开(公告)号：US09557248B2

公开(公告)日：2017-01-31

申请号：US14208375

申请日：2014-03-13

申请人： Thorsten Feiweier ,  Alto Stemmer

发明人： Thorsten Feiweier ,  Alto Stemmer

IPC分类号： G01M99/00 ,  G06F19/00 ,  G01R33/54 ,  G01R33/561 ,  A61B6/00 ,  A61B8/00

CPC分类号： G01M99/008 ,  A61B6/586 ,  A61B8/54 ,  G01R33/543 ,  G01R33/561 ,  G06F19/00 ,  G06F19/321 ,  G16H40/63

摘要： In a method for operating a medical imaging system and a medical imaging system operating according to such a method, a measurement sequence is divided into a number of partial sequences, with each of the partial sequences resulting in a loading of at least one of these system components when the measurement sequence is executed. The partial sequences are evaluated, in terms of their number and duration, using a computerized model in order to determine whether a load limit for the at least one of the system components is exceeded. If so, the number or duration of the partial sequences is modified, and a check using the computer model is again implemented. A number or respective duration of the partial sequences that results in the load limit not being exceeded is then used as a final output in order to operate the medical imaging system.

摘要翻译： 在用于操作根据这种方法操作的医学成像系统和医学成像系统的方法中，测量序列被分成多个部分序列，每个部分序列导致这些系统中的至少一个的加载 执行测量序列时的组件。 使用计算机化模型来评估部分序列的数量和持续时间，以便确定是否超过了至少一个系统组件的负载限制。 如果是这样，则部分序列的数量或持续时间被修改，并且再次实现使用计算机模型的检查。 然后将导致不超过负载限制的部分序列的数量或相应持续时间用作最终输出，以便操作医学成像系统。

公开(公告)号：US09476955B2

公开(公告)日：2016-10-25

申请号：US13847656

申请日：2013-03-20

申请人： Alto Stemmer

发明人： Alto Stemmer

IPC分类号： G01R33/54 ,  G01R33/483 ,  G01R33/44 ,  A61B5/055 ,  G01R33/48

CPC分类号： G01R33/543 ,  A61B5/055 ,  G01R33/44 ,  G01R33/4824 ,  G01R33/4835

摘要： In a method and a control device for operation of a magnetic resonance tomography system to generate image data, multiple of slices in an examination subject are initially excited at a first time interval by a respective RF slice excitation pulse of a series of spatially selective slice excitation pulses. An RF refocusing pulse is then emitted at a second time interval after the first excitation pulse or after the last excitation pulse of the series of RF slice excitation pulses. At least one additional RF refocusing pulse is emitted at a third time interval after a preceding RF refocusing pulse. The third time interval is twice as long as the second time interval. The width of the RF refocusing pulses is selected to generate a number of chronologically separate echo signals per RF refocusing pulse for simultaneous refocusing of all excited slices.

摘要翻译： 在用于产生图像数据的磁共振断层摄影系统的操作的方法和控制装置中，检查对象中的多个切片首先通过一系列空间选择性切片激励的相应RF切片激励脉冲以第一时间间隔激发 脉冲。 然后在第一激发脉冲之后的第二时间间隔或在一系列RF片激励脉冲的最后激励脉冲之后发射RF重聚焦脉冲。 在先前的RF重聚焦脉冲之后的第三时间间隔发射至少一个附加的RF再聚焦脉冲。 第三个时间间隔是第二个时间间隔的两倍。 选择RF重聚焦脉冲的宽度以产生每个每个RF重聚焦脉冲的时间上不同的回波信号，以同时重新聚焦所有激发的切片。

公开(公告)号：US09392958B2

公开(公告)日：2016-07-19

申请号：US13483454

申请日：2012-05-30

申请人： Matthias Fenchel ,  Kirstin Jattke ,  Jun Bao ,  Alto Stemmer ,  William Curtis Howe

发明人： Matthias Fenchel ,  Kirstin Jattke ,  Jun Bao ,  Alto Stemmer ,  William Curtis Howe

IPC分类号： A61B5/055 ,  A61B5/00 ,  A61B6/03 ,  A61B6/00 ,  G01R33/48

CPC分类号： A61B5/055 ,  A61B5/0035 ,  A61B5/7285 ,  A61B6/037 ,  A61B6/4417 ,  A61B6/5205 ,  A61B6/5247 ,  A61B6/5258 ,  A61B6/5264 ,  A61B6/527 ,  A61B6/5288 ,  A61B6/548 ,  G01R33/481

摘要： Various embodiments relate to a method of attenuation correction of Positron Emission Tomography (PET) data based on Magnetic Resonance Tomography (MRT) data. A method of at least one embodiment further includes determining further data being indicative of an iterative cycle of a physiological observable of a patient and matching the PET data with the MRT data based on the further data.

摘要翻译： 各种实施方案涉及基于磁共振层析成像（MRT）数据的正电子发射断层扫描（PET）数据的衰减校正方法。 至少一个实施例的方法还包括确定指示患者的生理可观察的迭代循环的另外的数据，并且基于进一步的数据将PET数据与MRT数据进行匹配。

公开(公告)号：US09138162B2

公开(公告)日：2015-09-22

申请号：US13866311

申请日：2013-04-19

申请人： Alto Stemmer

发明人： Alto Stemmer

IPC分类号： A61B5/055 ,  A61B5/08 ,  G01R33/565 ,  A61B5/00 ,  A61B5/113 ,  G01R33/567

CPC分类号： A61B5/055 ,  A61B5/08 ,  A61B5/1135 ,  A61B5/7289 ,  G01R33/56509 ,  G01R33/5676

摘要： In a method for acquisition of a measurement data set of a respirating examination subject by magnetic resonance technology, the measurement data set is acquired by numerous individual measurements, wherein, for each individual measurement, a respiratory position and a respiratory phase are determined, based on which it is decided whether the individual measurement is to be included in the final measurement data set from which an image data set is reconstructed.

摘要翻译： 在通过磁共振技术获取呼吸检查对象的测量数据集的方法中，通过多次单独测量来获取测量数据集，其中，对于每个单独的测量，基于以下方式确定呼吸位置和呼吸相位： 决定是否将单独的测量值包括在重建图像数据组的最终测量数据集中。

公开(公告)号：US20130281824A1

公开(公告)日：2013-10-24

申请号：US13866311

申请日：2013-04-19

申请人： Alto Stemmer

发明人： Alto Stemmer

IPC分类号： A61B5/055

CPC分类号： A61B5/055 ,  A61B5/08 ,  A61B5/1135 ,  A61B5/7289 ,  G01R33/56509 ,  G01R33/5676

摘要： In a method for acquisition of a measurement data set of a respirating examination subject by magnetic resonance technology, the measurement data set is acquired by numerous individual measurements, wherein, for each individual measurement, a respiratory position and a respiratory phase are determined, based on which it is decided whether the individual measurement is to be included in the final measurement data set from which an image data set is reconstructed.

摘要翻译： 在通过磁共振技术获取呼吸检查对象的测量数据集的方法中，通过多次单独测量来获取测量数据集，其中，对于每个单独的测量，基于以下方式确定呼吸位置和呼吸相位： 决定是否将单独的测量值包括在重建图像数据组的最终测量数据集中。

公开(公告)号：US20130249548A1

公开(公告)日：2013-09-26

申请号：US13847656

申请日：2013-03-20

申请人： Alto Stemmer

发明人： Alto Stemmer

IPC分类号： G01R33/54 ,  G01R33/44

CPC分类号： G01R33/543 ,  A61B5/055 ,  G01R33/44 ,  G01R33/4824 ,  G01R33/4835

摘要： In a method and a control device for operation of a magnetic resonance tomography system to generate image data, multiple of slices in an examination subject are initially excited at a first time interval by a respective RF slice excitation pulse of a series of spatially selective slice excitation pulses. An RF refocusing pulse is then emitted at a second time interval after the first excitation pulse or after the last excitation pulse of the series of RF slice excitation pulses. At least one additional RF refocusing pulse is emitted at a third time interval after a preceding RF refocusing pulse. The third time interval is twice as long as the second time interval. The width of the RF refocusing pulses is selected to generate a number of chronologically separate echo signals per RF refocusing pulse for simultaneous refocusing of all excited slices.

摘要翻译： 在用于产生图像数据的磁共振断层摄影系统的操作的方法和控制装置中，检查对象中的多个切片首先通过一系列空间选择性切片激励的相应RF切片激励脉冲以第一时间间隔激发 脉冲。 然后在第一激发脉冲之后的第二时间间隔或在一系列RF片激励脉冲的最后激励脉冲之后发射RF重聚焦脉冲。 在先前的RF重聚焦脉冲之后的第三时间间隔发射至少一个附加的RF再聚焦脉冲。 第三个时间间隔是第二个时间间隔的两倍。 选择RF重聚焦脉冲的宽度以产生每个每个RF重聚焦脉冲的时间上不同的回波信号，以同时重新聚焦所有激发的切片。

公开(公告)号：US08427155B2

公开(公告)日：2013-04-23

申请号：US12780080

申请日：2010-05-14

申请人： Alto Stemmer

发明人： Alto Stemmer

IPC分类号： G01V3/00

CPC分类号： G01R33/56375 ,  G01R33/4835 ,  G01R33/5615 ,  G01R33/56383

摘要： In a method and a device to control a workflow of an MR measurement in a magnetic resonance system, MR signals from multiple slices of a predetermined volume segment of an examination subject are acquired, multiple slices with a continuous table feed. In the MR measurement, one of these multiple slices in the active volume of the magnetic resonance system is repeatedly measured in succession at different measurement positions Pi in an order corresponding to the index of the measurement positions Pi. The measurement positions Pi are determined via the following Equation, starting from a largely arbitrary first measurement position P1 selected in the active volume of the magnetic resonance system: P i = P i - 1 + d × ( ± c - 1 + c c + e × ( 1 - TR - TB TR ) ) , ⁢ ⁢ ⁢ for ⁢ ⁢ i = 2 , … ⁢ , c + e , wherein d is a slice interval, c is a natural number greater than 1 and e is a whole number that is not greater than c and not less than 0. The number of measurement positions Pi in the active volume results from the sum of c and e. TB indicates a time period from the beginning of an excitation at one measurement position to the beginning of a chronologically next excitation at a measurement position nearest the measurement position. TR is a middle time period from the beginning of one excitation of a slice to the beginning of a chronologically next excitation of an additional slice and “±” means “+” if an excitation order follows a direction of the table displacement, and otherwise is “−”.

摘要翻译： 在用于控制磁共振系统中的MR测量的工作流程的方法和装置中，获取来自检查对象的预定体积段的多个切片的MR信号，具有连续表格馈送的多个切片。 在MR测量中，以与测量位置Pi的指标对应的顺序，在不同的测量位置Pi连续测量磁共振系统的有效体积中的这些多个切片之一。 测量位置Pi通过以下等式确定，从在磁共振系统的有效体积中选择的大部分任意的第一测量位置P1开始：P i = P i-1 + d×（±c-1 + cc + e ×（1-TR-TB TR）），注意为i = 2，...，c + e，其中d是切片间隔，c是大于1的自然数，e是整数 不大于c且不小于0.活动体积中的测量位置Pi的数量由c和e的总和产生。 TB表示从最接近测量位置的测量位置处的一个测量位置处的激励开始到按时间顺序的下一个激励开始的时间段。 TR是从切片的一次激励开始到附加切片的按时间顺序的下一次激励的开始的中间时间段，如果激励顺序遵循表移位的方向，则“±”表示“+”，否则为“+” “ - ”。

公开(公告)号：US20120235681A1

公开(公告)日：2012-09-20

申请号：US13423488

申请日：2012-03-19

申请人： Alto Stemmer

发明人： Alto Stemmer

IPC分类号： G01R33/44

CPC分类号： G01R33/56563 ,  G01R33/4835 ,  G01R33/5613 ,  G01R33/5614 ,  G01R33/56383

摘要： In a method and system to adjust at least one shim current in a shim channel of a magnetic resonance apparatus and an associated RF center frequency for the radio-frequency system of the magnetic resonance apparatus during an interleaved multislice MR measurement of a moving examination subject, in which MR measurement at least two excitations are implemented for complete acquisition of the desired data of a slice of the examination subject that is to be measured, the multislice MR measurement is implemented such that phase discontinuities between measurement data acquired after individual excitations are avoided.

摘要翻译： 在用于在移动检查对象的交叉多层MR测量期间调整磁共振装置的垫片通道中的至少一个垫片电流和用于磁共振装置的射频系统的相关RF中心频率的方法和系统中， 其中MR测量实现至少两个激发以完全获取要测量的检查对象的切片的期望数据，实施多重MR测量，使得避免在单独激发之后获取的测量数据之间的相位不连续性。

公开(公告)号：US20120229136A1

公开(公告)日：2012-09-13

申请号：US13416289

申请日：2012-03-09

申请人： Alto Stemmer

发明人： Alto Stemmer

IPC分类号： G01R33/44

CPC分类号： G01R33/56383 ,  G01R33/246 ,  G01R33/5659

摘要： A method and magnetic resonance tomography system to generate magnetic resonance image data of an examination subject, raw imaging data are acquired from multiple slices of a predetermined volume region of the examination subject using local coils during a table feed in the magnetic resonance scanner. Image data of the slices are reconstructed on the basis of the raw imaging data. A normalization of the image data is subsequently implemented on the basis of measured coil sensitivity data of the local coils that are used.

摘要翻译： 一种用于产生检查对象的磁共振图像数据的方法和磁共振断层摄影系统，在磁共振扫描器中的表进给期间，使用局部线圈从检查对象的预定体积区域的多个切片中获取原始成像数据。 基于原始成像数据重建切片的图像数据。 随后基于所使用的局部线圈的测量线圈灵敏度数据来实现图像数据的归一化。