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41. 发明申请

US20190128987A1 METHOD AND MAGNETIC RESONANCE TOMOGRAPHY APPARATUS FOR DIFFUSION IMAGING 审中-公开
公开(公告)号：US20190128987A1
公开(公告)日：2019-05-02
申请号：US16171611
申请日：2018-10-26
申请人： Siemens Healthcare GmbH
发明人： Thorsten Feiweier
IPC分类号： G01R33/563 , G01R33/561 , G01R33/54
CPC分类号： G01R33/56341 , G01R33/543 , G01R33/5618 , G01R33/565
摘要： In a method and magnetic resonance tomography apparatus for diffusion imaging, coherences are determined in a processor, which would occur during the diffusion imaging measurement, and an implicit spoil moment MA resulting from a diffusion gradient pulse is determined in the processor. A spoiler moment MS is established in the processor as a function of a comparison value and threshold value formed from the implicit spoil moment MA and the suppression moment M. Depending on whether this comparison value lies below or above the threshold value, different calculation techniques are applied for the spoiler moment MS. Diffusion gradient pulses and spoiler gradient pulses in accordance with the moments MA and MS in a pulse sequence for operating the magnetic resonance tomography apparatus.

42. 发明授权

US10275875B2 Method and device for dynamic effects correction in medical imaging 有权
公开(公告)号：US10275875B2
公开(公告)日：2019-04-30
申请号：US15092843
申请日：2016-04-07
申请人： SIEMENS HEALTHCARE GMBH
发明人： Himanshu Bhat , Thorsten Feiweier , Tobias Kober , Carsten Prinz , Daniel Nico Splitthoff , Stephan Stoecker
IPC分类号： G06T7/00 , G01R33/565 , G06T7/20 , H04N5/232 , H04N5/357 , G06T7/80 , A61B5/055 , A61B8/08 , A61B6/00 , G01R33/54
摘要： A method for automatically and dynamically optimizing image acquisition parameters/commands of an imaging procedure performed by a medical imaging apparatus in order to mitigate or cancel dynamic effects perturbing the image acquisition process of an object to be imaged by the medical imaging apparatus. The method includes connecting a dynamic correction module (DCM) to the medical imaging apparatus, automatically acquiring by the DCM image acquisition parameters/commands and data about dynamic changes or effects, and automatically determining in real time, by the DCM, at least one new image acquisition parameter/command from the image acquisition parameters/commands defined in the imaging control system and the dynamic change data, while the image acquisition parameter/command defined in the imaging control system remains unchanged. The method further includes automatically providing, by the DCM, the new image acquisition parameter/command to the hardware control system.

43. 发明授权

US10185018B2 Method for motion correction in magnetic resonance imaging and magnetic resonance imaging apparatus 有权
公开(公告)号：US10185018B2
公开(公告)日：2019-01-22
申请号：US15131232
申请日：2016-04-18
申请人： SIEMENS HEALTHCARE GMBH
发明人： Thorsten Feiweier , Martin Harder , Tobias Kober
IPC分类号： G01R33/48 , G01R33/565 , G01R33/56 , G01R33/563 , G01R33/54
摘要： A method for automatically updating planning of measurement volumes as a function of object motion during MRI examination of an object in which the planning images a specific subject/object anatomy by MRI, includes defining an object reference pose and a reference coordinate system for the reference pose at a time during MRI examination, with the reference coordinate system being used for planning the measurement volumes. During examination, information is obtained about an object pose change between a current object pose at the time and the reference pose. For each subsequent scan or single acquisition of imaging data during examination, pose change information is used for calculating a new coordinate system for the current pose and updating the planning of measurement volumes as a function of the new coordinate system so the imaged object anatomy remains the same throughout the scans or acquisitions of imaging data irrespective of object motion.

44. 发明授权

US10120050B2 Slice-specific phase correction in slice multiplexing 有权
公开(公告)号：US10120050B2
公开(公告)日：2018-11-06
申请号：US13856586
申请日：2013-04-04
申请人： Siemens Healthcare GmbH
发明人： Thorsten Feiweier
IPC分类号： G01R33/56 , G01R33/483 , G01R33/28 , G01R33/565
摘要： In a method to correct a signal phase in the acquisition of MR signals of an examination subject in a slice multiplexing method, in which MR signals from at least two different slices of the examination subject are detected simultaneously in the acquisition of the MR signals, a linear correction phase in the slice selection direction is determined for each of the at least two slices. An RF excitation pulse with a slice-specific frequency is radiated in each of the at least two different slices. A slice selection gradient is activated during a slice selection time period, during which the different RF excitation pulses are radiated in the at least two different slices, and the slice selection time period has a middle point in time in the middle of the slice selection time period, and the different RF excitation pulses temporally overlap for the at least two different slices. A time offset of the RF excitation pulse relative to the middle point in time for each of the RF excitation pulses is determined, such that a slice-specific correction gradient moment in the slice selection direction that corresponds to the linear correction phase of the respective slice acts on the magnetization of the respective slice.

45. 发明申请

US20180299524A1 METHOD AND MAGNETIC RESONANCE APPARATUS FOR OPTIMIZING THE SIMULTANEOUS ACQUISITION OF MAGNETIC RESONANCE DATA FROM MULTIPLE SLABS OR SLICES 审中-公开
公开(公告)号：US20180299524A1
公开(公告)日：2018-10-18
申请号：US15951370
申请日：2018-04-12
申请人： Siemens Healthcare GmbH
发明人： Thorsten Feiweier
IPC分类号： G01R33/483 , G01R33/56 , G01R33/24
CPC分类号： G01R33/4835 , G01R33/24 , G01R33/5608 , G01R33/5611
摘要： In an acquisition of magnetic resonance (MR) data from a volume portion of an object, a set of a number of planned volume elements is predefined in the volume portion, wherein MR data are to be acquired from each of the planned volume elements. Furthermore, conditions that are to be fulfilled in the acquisition of the MR data of the planned volume elements are predefined. Dependent upon the planned volume elements and the conditions, a set of additional volume elements is determined. The MR data are acquired from at least two volume elements simultaneously, the at least two volume elements including one volume element from the set of the planned volume elements and one volume element from the set of the additional volume elements.

46. 发明申请

US20180210056A1 METHOD AND APPARATUS FOR ACQUIRING MAGNETIC RESONANCE DATA 审中-公开
公开(公告)号：US20180210056A1
公开(公告)日：2018-07-26
申请号：US15878891
申请日：2018-01-24
申请人： Siemens Healthcare GmbH
发明人： Michael Koehler , Thorsten Feiweier
IPC分类号： G01R33/56 , G01R33/565
CPC分类号： G01R33/5607 , G01R33/243 , G01R33/56527 , G01R33/56536
摘要： In a method and magnetic resonance (MR) apparatus for acquiring MR data from a volume of an object in which first and second excitable spin types are present that differ in their Larmor frequencies by a chemical shift, an MR sequence with at least one radio-frequency pulse sequence selectively excites the first spin type or selectively suppresses MR signals of the second spin type. A B0 map describing the basic field distribution in a region of interest of the volume is established. First and second items of distribution information, which respectively describe the spectral distribution of Larmor frequencies of the first and second spin types, are derived from the B0 map. A pulse sequence parameter that describes the excitation spectrum of the radio-frequency pulse sequence is optimized based on the items of distribution information, with regard to a quality criterion that optimizes selective excitation and/or suppression.

47. 发明申请

US20180204045A1 METHOD AND APPARATUS FOR CLASSIFYING MAGNETIC RESONANCE MEASUREMENT DATA ACQUIRED FROM AN EXAMINATION OBJECT USING A MAGNETIC RESONANCE FINGERPRINTING METHOD 审中-公开
公开(公告)号：US20180204045A1
公开(公告)日：2018-07-19
申请号：US15875086
申请日：2018-01-19
申请人： Siemens Healthcare GmbH
发明人： Thorsten Feiweier , Stefan Huwer , Mathias Nittka
IPC分类号： G06K9/00 , G01R33/24 , G01R33/48
摘要： In a method and computer and magnetic resonance (MR) apparatus for classifying MR measurement data acquired from an object under examination by execution of an MR fingerprinting method, wherein the MR measurement data include multiple MR signal profiles acquired by the MR fingerprinting method. At least one texture parameter is derived from the MR measurement data. The MR measurement data are classified into at least one tissue class using the at least one texture parameter. The classified MR measurement data are provided as an output.

48. 发明申请

US20170322281A1 METHOD AND APPARATUS FOR RECORDING OF DIFFUSION-WEIGHTED MAGNETIC RESONANCE IMAGE DATA WITH ANISOTROPIC DIFFUSION DIRECTIONS 审中-公开
公开(公告)号：US20170322281A1
公开(公告)日：2017-11-09
申请号：US15589026
申请日：2017-05-08
申请人： Siemens Healthcare GmbH
发明人： Thorsten Feiweier
IPC分类号： G01R33/563 , G01R33/385 , G01R33/54 , G01R33/56
CPC分类号： G01R33/56341 , G01R33/385 , G01R33/543 , G01R33/5608
摘要： In a method and a magnetic resonance apparatus for diffusion-weighted imaging, diffusion gradients for acquiring diffusion-weighted image data, with anisotropic diffusion directions, are determined by defining a space of achievable diffusion gradient vectors as a cuboid, and then defining a spherical shell around the gradient axes in order to determine specific values of the gradient amplitudes. The resulting diffusion gradient vectors have a direct influence on the achievable signal-to-noise ratio of an individual scan, and the method and apparatus enable an advance selection of a desired effective gradient amplitude, and the presentation to a user of candidate diffusion gradient vectors that satisfy the desired requirements.

49. 发明申请

US20170234956A1 METHOD, CONTROLLER, AND MAGNETIC RESONANCE APPARATUS FOR MODEL-FREE DETERMINATION OF IMAGE REGIONS WITH ANOMALOUS DIFFUSION USING DIFFUSION-WEIGHTED MAGNETIC RESONANCE IMAGE DATA 有权
公开(公告)号：US20170234956A1
公开(公告)日：2017-08-17
申请号：US15433190
申请日：2017-02-15
申请人： Siemens Healthcare GmbH
发明人： Thorsten Feiweier
IPC分类号： G01R33/563 , G01R33/56
CPC分类号： G01R33/56341 , G01R33/5608 , G01R33/5616
摘要： In a magnetic resonance apparatus and a method and controller for operating such an apparatus, first and second diffusion-weighted image data are reconstructed from first and second diffusion-encoded raw data that were respectively acquired using different diffusion-encoding gradient pulse sub-sequences. The different sub-sequences differ by respectively having a different parameter that characterizes the respective sub-sequence as a function of time. The first and second reconstructed image data are compared and a deviation of the image data from normal Gaussian diffusion behavior is determined model-free on the basis of the comparison result.

50. 发明申请

US20170090001A1 METHOD AND APPARATUS FOR CORRECTION OF MAGNETIC RESONANCE IMAGE DATA 审中-公开
公开(公告)号：US20170090001A1
公开(公告)日：2017-03-30
申请号：US15281958
申请日：2016-09-30
申请人： Siemens Healthcare GmbH
发明人： Thorsten Feiweier
IPC分类号： G01R33/58
CPC分类号： G01R33/58 , G01R33/543 , G01R33/565
摘要： In a method and apparatus for correction of magnetic resonance image data, at least on environmental conditions map is provided to a computer, measurement data are acquired using a prospective correction method and storage of a first set of correction data, established within the framework of the prospective correction method, is stored. Image data are reconstructed from the recorded measurement data, and a second set of correction data are determined for the created image data and/or the recorded measurement data by a second correction method on the basis of the environmental conditions map and on the basis of the first set of correction data. Corrected image data are generated using the second set of correction data.

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