公开(公告)号：US07295008B2

公开(公告)日：2007-11-13

申请号：US11540164

申请日：2006-09-29

Applicant: Vladimir Jellus ,  Stephan Kannengiesser ,  David Andrew Porter

Inventor： Vladimir Jellus ,  Stephan Kannengiesser ,  David Andrew Porter

IPC: G01V3/00

CPC classification number: G01R33/565 ,  G01R33/3415 ,  G01R33/5659

Abstract: In the operation of a magnetic resonance system, an RF excitation coil emits an excitation pulse such that nuclei in an examination subject are excited to emit of magnetic resonance signals. A number of local coils acquire the magnetic resonance signals emitted from the examination subject, with the magnetic resonance signals acquired by the local coils being coded in frequency space. An evaluation device accepts the magnetic resonance signals acquired by the local coils or accepts intermediate signals derived therefrom via one transmission channel per signal, and corrects the accepted signals using correction signals. The evaluation device uses the corrected signals reconstructing an image of the examination subject. The evaluation device determines the correction signals for all signals to be corrected using the same reference signal.

Abstract translation: 在磁共振系统的操作中，RF激励线圈发射激励脉冲，使得激励检查对象中的核发出磁共振信号。 多个本地线圈获取从检查对象发射的磁共振信号，由本地线圈获取的磁共振信号在频率空间中编码。 评估装置接受本地线圈获取的磁共振信号，或者通过每个信号经由一个传输信道接收从其导出的中间信号，并使用校正信号来校正接受的信号。 评估装置使用重建检查对象的图像的校正信号。 评估装置使用相同的参考信号确定要校正的所有信号的校正信号。

公开(公告)号：US20050264288A1

公开(公告)日：2005-12-01

申请号：US11126691

申请日：2005-05-11

Applicant: Swen Campagna ,  Martin Harder ,  Peter Heubes ,  Rainer Kaim ,  Stephan Kannengiesser ,  Berthold Kiefer ,  Cecile Mohr ,  Katrin Wohlfarth

Inventor： Swen Campagna ,  Martin Harder ,  Peter Heubes ,  Rainer Kaim ,  Stephan Kannengiesser ,  Berthold Kiefer ,  Cecile Mohr ,  Katrin Wohlfarth

IPC: A61B5/055 ,  G01R33/28 ,  G01R33/563 ,  G01R33/58 ,  G01V3/00

CPC classification number: G01R33/58 ,  G01R33/56375

Abstract: In a method for implementation of a magnetic resonance examination of a patient with an imaging medical magnetic resonance apparatus with a movable patient bed, for of an examination volume of the patient that is larger than an acquisition volume of the magnetic resonance apparatus, anatomical patient information and second technical information for setting the magnetic resonance apparatus are acquired dependent on the position of the patient bed from magnetic resonance signals acquired in a low-resolution calibration measurement (scan). A first group of measurement protocol parameters is generated from the patient information and a second group of measurement protocol parameters is generated from the technical information, to generate a measurement protocol for a subsequent high-resolution magnetic resonance examination.

Abstract translation: 在用具有可移动患者床的成像医用磁共振装置实施对患者的磁共振检查的方法中，对于大于磁共振装置的采集体积的患者的检查体积，解剖患者信息 并且根据在低分辨率校准测量（扫描）中获取的磁共振信号，取决于患者床的位置来获取用于设置磁共振设备的第二技术信息。 从患者信息生成第一组测量协议参数，并从技术信息产生第二组测量协议参数，以产生随后的高分辨率磁共振检查的测量协议。

公开(公告)号：US09429635B2

公开(公告)日：2016-08-30

申请号：US14054914

申请日：2013-10-16

Applicant: Xiaodong Zhong ,  Marcel Dominik Nickel ,  Stephan Kannengiesser

Inventor： Xiaodong Zhong ,  Marcel Dominik Nickel ,  Stephan Kannengiesser

IPC: G01V3/00 ,  G01R33/48 ,  G01R33/50

CPC classification number: G01R33/4828 ,  G01R33/50

Abstract: Embodiments relate to evaluating properties of tissues with magnetic resonance imaging (MRI). A MR image is used to measure a characteristic that influences a particular chemical property of a tissue. In an exemplary embodiment, tissue transverse relaxation values or relaxation rates, which can readily be measured from MR images, are used to evaluate iron deposition in tissue. Iron deposition influences the tissue transverse relaxation values (T2 or T2*) or relaxation rates (R2=1/T2 or R2*=1/T2*). A clinically relevant R2CR* map is calculated based on the known values of the effective R2eff*, the water R2w*, and the fat R2f* by incorporating the most relevant value for each individual image element of a plurality of image elements of an MR image of the tissue. The clinically relevant R2CR* map provides an accurate evaluation of iron deposition in any region of the tissue with the use of one map.

Abstract translation: 实施例涉及评估具有磁共振成像（MRI）的组织的性质。 MR图像用于测量影响组织的特定化学性质的特征。 在示例性实施例中，可以容易地从MR图像测量的组织横向松弛值或松弛率用于评估组织中的铁沉积。 铁沉积影响组织横向弛豫值（T2或T2 *）或松弛率（R2 = 1 / T2或R2 * = 1 / T2 *）。 基于有效R2eff *，水R2w *和脂肪R2f *的已知值，通过对MR图像的多个图像元素的每个单独图像元素合并最相关值来计算临床相关的R2CR *图 的组织。 临床上相关的R2CR *图谱使用一张地图提供组织任何区域铁沉积的准确评估。

公开(公告)号：US20130076352A1

公开(公告)日：2013-03-28

申请号：US13627042

申请日：2012-09-26

Applicant: Kai Tobias Block ,  Stephan Kannengiesser ,  Marcel Dominik Nickel

Inventor： Kai Tobias Block ,  Stephan Kannengiesser ,  Marcel Dominik Nickel

IPC: G01R33/58 ,  G01R33/341

CPC classification number: G01R33/5611

Abstract: In a method to select an undersampling scheme of k-space and an associated set of reconstruction kernels to acquire reduced magnetic resonance (MR) data sets with multiple coils, a calibration data set is acquired for each of the respective coils, a noise covariance is determined from autocorrelations and correlations of the noise of the various coils. At least one set of reconstruction kernels is calculated for each of the multiple undersampling schemes from the calibration data sets of the various coils. For each set of reconstruction kernels, a characteristic value is calculated from the noise covariance and the respective reconstruction kernels of the coils, with the characteristic value being proportional to a spatial mean value of a signal noise of an MR image. A selected undersampling scheme and a selected set of reconstruction kernels are selected based on the calculated characteristic values.

Abstract translation: 在选择k空间的欠采样方案和相关联的一组重建内核以获取具有多个线圈的减小的磁共振（MR）数据集的方法中，针对各个线圈获取校准数据集，噪声协方差为 根据各种线圈的噪声的自相关性和相关性确定。 根据各种线圈的校准数据集，对于多个欠采样方案中的每一个计算至少一组重构内核。 对于每组重建内核，根据噪声协方差和线圈的相应重建内核计算特征值，其特征值与MR图像的信号噪声的空间平均值成比例。 基于所计算的特征值来选择所选的欠采样方案和所选择的重构内核集合。

公开(公告)号：US20120203099A1

公开(公告)日：2012-08-09

申请号：US13369608

申请日：2012-02-09

Applicant: Andre De Oliveira ,  Stephan Kannengiesser ,  Martin Requardt

Inventor： Andre De Oliveira ,  Stephan Kannengiesser ,  Martin Requardt

IPC: A61B5/055

CPC classification number: G01R33/287 ,  G01R33/485

Abstract: In a method and a magnetic resonance system to show an object that is introduced into an examination region, the object having a known chemical shift relative to tissue that is predominant in the examination region, magnetic resonance signals are acquired from the examination region of the subject with the introduced object therein, and the different chemical shift of the introduced object and of the predominant tissue is computationally used in a processor to calculate, from the acquired magnetic resonance signals, a localization image in which substantially only the introduced object is shown.

Abstract translation: 在用于显示被引入到检查区域中的物体的方法和磁共振系统中，具有相对于在检查区域中占优势的组织的已知化学位移的物体，从受检者的检查区域获取磁共振信号 其中引入的物体，并且在处理器中计算地使用引入物体和主要组织的不同化学位移，以从所获取的磁共振信号中计算基本上仅显示引入物体的定位图像。

公开(公告)号：US07821262B2

公开(公告)日：2010-10-26

申请号：US11753691

申请日：2007-05-25

Applicant: Stephan Kannengiesser ,  Ralf Loeffler ,  Edgar Mueller ,  Peter Schmitt

Inventor： Stephan Kannengiesser ,  Ralf Loeffler ,  Edgar Mueller ,  Peter Schmitt

IPC: G01V3/00

CPC classification number: G01R33/5611 ,  G01R33/4824

Abstract: In a method as well as a magnetic resonance tomography apparatus for implementation of such a method for improved sensitivity-encoded magnetic resonance imaging using a two-dimensional or three-dimensional acquisition coil array, two-dimensional or three-dimensional undersampling of k-space is undertaken by measurement of a number N of basic partial trajectories τn in k-space that in their entirety form a geometric arrangement of source points, a number M of different operators Cm(Δ km) are determined, with each operator representing an algebraic transformation with which unmeasured target points at an interval Δ km from one of the measured source points are synthesized from a number of measured source points, the operators Cm(Δ km) are applied to at least one subset of the measured source points for at least partial completion of the magnetic resonance data set, and a largely artifact-free image is reconstructed in three-dimensional space on the basis of the measured source points and the synthesized data points.

Abstract translation: 在一种方法以及用于实施这种用于使用二维或三维采集线圈阵列改进灵敏度编码的磁共振成像的方法的磁共振断层摄影装置中，k空间的二维或三维欠采样 通过测量k空间中的N个基本部分轨迹τn进行，其整体形成源点的几何排列，确定不同算子C m（＆Dgr; km）的数量M，每个运算符表示代数 未测量的目标点的间隔＆Dgr的转换; 从测量的源点之一合成一公里，将运算符Cm（＆Dgr; km）应用于测量源点的至少一个子集，用于至少部分完成磁共振数据集， 并且基于测量的源点和合成数据点在三维空间中重建基本上无伪影的图像。

公开(公告)号：US07495437B2

公开(公告)日：2009-02-24

申请号：US11409373

申请日：2006-04-21

Applicant: Mark Griswold ,  Vladimir Jellus ,  Stephan Kannengiesser

Inventor： Mark Griswold ,  Vladimir Jellus ,  Stephan Kannengiesser

IPC: G01V3/00

CPC classification number: G01R33/5611

Abstract: In a method and apparatus for generating a magnetic resonance image of a contiguous region of a human body on the basis of partial parallel acquisition (PPA) by excitation of nuclear spins and measurement of radio-frequency signals indicating the excited spins, the spin excitation is implemented in steps with measurement of an RF response signal simultaneously in each of a number of N component coils. A number of response signals thus are acquired that, for each component coil, form an incomplete data set (40) of acquired RF signals. Additional acquired calibration data points exist for each incomplete data set. The N incomplete data sets are acquired to a subset of M reduced, incomplete data sets on the basis of an N×M reduction matrix, so that M reduced, incomplete data sets are obtained, M complete data sets are formed on the basis of an N×M reconstruction matrix with the non-measured lines of the M reduced, incomplete data sets being reconstructed from all N incomplete data sets. A spatial transformation of the completed reduced data sets is then implemented in order to form a complete image data set from each completed, reduced data set.

Abstract translation: 在通过激励核自旋的部分并行采集（PPA）和表示激发的自旋的射频信号的测量来产生人体的连续区域的磁共振图像的方法和装置中，自旋激发是 在多个N个分量线圈的每一个中同时测量RF响应信号的步骤实现。 因此，获得多个响应信号，对于每个分量线圈，形成所获取的RF信号的不完整数据集（40）。 对于每个不完整的数据集，存在额外的获取的校准数据点。 N个不完整的数据集基于N×M个缩减矩阵被获取到M个不完整的数据集的子集，从而获得M个减少的不完整的数据集，M个完整数据集是基于N×M重建形成的 矩阵，其中M个未测量的线减少，不完整的数据集从所有N个不完整的数据集重建。 然后实现完成的缩减数据集的空间变换，以便从每个完成的简化数据集合形成完整的图像数据集。

公开(公告)号：US20050187458A1

公开(公告)日：2005-08-25

申请号：US10988127

申请日：2004-11-12

Applicant: Stephan Kannengiesser ,  Berthold Kiefer ,  Mathias Nittka

Inventor： Stephan Kannengiesser ,  Berthold Kiefer ,  Mathias Nittka

IPC: A61B5/055 ,  G01R33/561 ,  G01R33/565

CPC classification number: G01R33/5611 ,  G01R33/56509

Abstract: In a method and apparatus for magnetic resonance imaging based on a partially parallel acquisition (PPA) reconstruction technique, a number of partial k-space data sets are acquired with a number of component coils, the totality of the partial data sets forming a complete k-space data set, the respective coil sensitivity of each component coil is determined based on at least one part of the complete k-space data set, any partial k-space data set is transformed via a PPA reconstruction technique dependent on the determined coil sensitivities, and the transformed partial data sets are superimposed to obtain a low-artifact image data set.

Abstract translation: 在基于部分并行采集（PPA）重建技术的用于磁共振成像的方法和装置中，使用多个分量线圈获取多个部分k空间数据集，部分数据集的总数形成完整的k - 空间数据集，基于完整的k空间数据集的至少一部分来确定每个分量线圈的相应线圈灵敏度，任何部分k空间数据集通过取决于确定的线圈灵敏度的PPA重建技术被变换 ，并且经变换的部分数据集被叠加以获得低伪像图像数据集。

公开(公告)号：US09568577B2

公开(公告)日：2017-02-14

申请号：US14013143

申请日：2013-08-29

Applicant: Stephan Kannengiesser

Inventor： Stephan Kannengiesser

IPC: G01R33/48

CPC classification number: G01R33/4828

Abstract: In a method and apparatus to determine a magnetic resonance image of an examination subject with at least two spin species by using a chemical shift imaging multi-echo MR measurement sequence, first approximated MR image is determined based on a first approximative model and of a second approximated MR image is determined based on a second approximative model, wherein the first and second approximative model respectively express an MR signal under consideration of one or more MR parameters, and wherein the first and second approximative model differ with regard to the consideration of at least one MR parameter. The MR image is determined from a mean calculation that depends on the first and second approximated MR image.

Abstract translation: 在通过使用化学位移成像多回波MR测量序列用至少两个自旋物质确定检查对象的磁共振图像的方法和装置中，基于第一近似模型和第二近似模型确定第一近似MR图像 基于第二近似模型确定近似MR图像，其中所述第一和第二近似模型分别在考虑一个或多个MR参数的情况下表示MR信号，并且其中所述第一和第二近似模型关于至少考虑至少 一个MR参数。 根据取决于第一和第二近似MR图像的平均计算确定MR图像。

公开(公告)号：US20100194390A1

公开(公告)日：2010-08-05

申请号：US12700191

申请日：2010-02-04

Applicant: Stephan Kannengiesser ,  Peter Schmitt ,  Michael Zenge

Inventor： Stephan Kannengiesser ,  Peter Schmitt ,  Michael Zenge

IPC: G01R33/48

CPC classification number: G01R33/56375 ,  A61B5/0555 ,  G01R33/5619 ,  G01R33/56308 ,  G01R33/56383

Abstract: In a magnetic resonance method and apparatus for time-resolved acquisition of magnetic resonance data in an examination region of a magnetic resonance imaging scanner, an object being examined is placed on a table and is continuously moved through the examination region, magnetic resonance signals are acquired from the examination region while the object being examined is continuously moved with the table through the examination region and prior to the acquisition of magnetic resonance signals, a phase coding that corresponds to a position in k-space, for the purpose of sampling k-space, is carried out. An interruption of the movement of the table takes place at a predetermined table position, and the acquisition of magnetic resonance signals from an examination region is continued over the course of a predetermined time period, while the table (13) is at rest in the predetermined position. At least while the table is at rest, the phase coding takes place such that acquisitions are made in alteration of a predetermined number of magnetic resonance signals for filling a first region of k-space with magnetic resonance data and a predetermined number of magnetic resonance signals for filling a second region of k-space with magnetic resonance data.

Abstract translation: 在用于在磁共振成像扫描仪的检查区域中时间分辨获取磁共振数据的磁共振方法和装置中，将正被检查的对象放置在工作台上并连续移动通过检查区域，获得磁共振信号 在检查对象被检查对象通过检查区域连续移动并且在获取磁共振信号之前，对于k空间中的位置进行相位编码，以便对k空间进行采样 ， 完成了。 桌子的移动中断发生在预定的工作台位置，并且在预定的时间段内持续从检查区域获取磁共振信号，而工作台（13）在预定的时间段内静止 位置。 至少在表处于静止状态时，进行相位编码，使得采用磁共振数据和预定数量的磁共振信号来填充预定数量的磁共振信号，以填充k空间的第一区域 用于用磁共振数据填充k空间的第二区域。