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公开(公告)号：US11540800B2
公开(公告)日：2023-01-03
申请号：US16756135
申请日：2018-10-12
发明人： Peter Koken , Julien Senegas , Martin Bergtholdt
IPC分类号： A61B5/05 , A61B6/00 , G06T7/11 , G06T7/70 , H04N5/232 , A61B5/00 , A61B5/107 , A61B6/03 , A61B6/04 , A61N5/10 , G06T5/00 , G06T7/00 , H04N5/225 , H04N7/18 , A61B5/055
摘要： The invention provides for a medical apparatus (100, 300, 400) comprising a subject support (102) configured for moving a subject (106) from a first position (124) to a second position (130) along a linear path (134). The subject support comprises a support surface (108) for receiving the subject. The subject support is further configured for positioning the subject support in at least one intermediate position (128). The subject support is configured for measuring a displacement (132) along the linear path between the first position and the at least one intermediate position. Each of the at least one intermediate position is located between the first position and the second position. The medical apparatus further comprises a camera (110) configured for imaging the support surface in the first position. Execution of machine executable instructions 116 cause the a processor (116) controlling the medical apparatus to: acquire (200) an initial image (142) with the camera when the subject support is in the first position; control (202) the subject support to move the subject support from the first position to the second position; acquire (204) at least one intermediate image (144) with the camera and the displacement for each of the at least one intermediate image as the subject support is moved from the first position to the second position; and calculate (206) a height profile (150, 600, 604) of the subject by comparing the initial image and the at least one intermediate image. The height profile is at least partially calculated using the displacement. The height profile is descriptive of the spatially dependent height of the subject above the support surface.
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公开(公告)号：US20180160934A1
公开(公告)日：2018-06-14
申请号：US15875063
申请日：2018-01-19
发明人： Steffen Weiss , Ronaldus Frederik Johannes Holthuizen , Sascha Krueger , Peter Koken , Daniel Wirtz , Thomas Erik Amthor , Alk Uhlemann
CPC分类号： A61B5/055 , A61B5/064 , A61B5/6832 , A61B5/72 , G01R33/287 , G01R33/34084
摘要： A medical apparatus (1100) comprising a magnetic resonance imaging system and an interventional device (300) comprising a shaft (302, 1014, 1120). The medical apparatus further comprises a toroidal magnetic resonance fiducial marker (306, 600, 800, 900, 1000, 1122) attached to the shaft. The shaft passes through a center point (610, 810, 908, 1006) of the fiducial marker. The medical apparatus further comprises machine executable instructions (1150, 1152, 1154, 1156, 1158) for execution by a processor. The instructions cause the processor to acquire (100, 200) magnetic resonance data, to reconstruct (102, 202) a magnetic resonance image (1142), and to receive (104, 204) the selection of a target volume (1118, 1144, 1168). The instructions further cause the processor to repeatedly: acquire (106, 206) magnetic resonance location data (1146) from the fiducial marker and render (108, 212) a view (1148, 1162) indicating the position of the shaft relative to the target zone.
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公开(公告)号：US11092659B2
公开(公告)日：2021-08-17
申请号：US16498555
申请日：2018-03-30
IPC分类号： G01R33/483 , G01R33/24 , G01R33/44 , G01R33/48 , G01R33/56 , G01R33/565
摘要： A magnetic resonance imaging (MRI) system (100) includes a memory (134) for storing machine executable instructions (140) and magnetic resonance fingerprinting (MRF) pulse sequence commands (142) which cause the MRI system to acquire MRF magnetic resonance data (144) according to an MRF protocol. The pulse sequence commands are configured for acquiring the MRF magnetic resonance data in two-dimensional slices (410, 412, 414, 416, 418, 420), having a slice selection direction. A train of pulse sequence repetitions includes a sampling event where the MRF data is repeatedly sampled. Execution of the machine executable instructions causes a processor to control the MRI system to: acquire (200) the MRF magnetic resonance data; construct (202) a series (148) of at least one magnetic resonance parameter value for each voxel of the two dimensional slices; and calculate (204) a composition (502, 504, 506, 508) of each of a set of predetermined substances within two or more sub-voxels (306, 308) for each voxel of the two dimensional slices using a sub-voxel magnetic resonance fingerprinting dictionary (150) for each of the two or more sub-voxels and the series of the at least one magnetic resonance parameter value. Each voxel in the slice selection direction is divided into two or more sub-voxels.
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公开(公告)号：US10788556B2
公开(公告)日：2020-09-29
申请号：US16072940
申请日：2017-02-06
IPC分类号： G01R33/56 , G01R33/46 , G01R33/48 , G01R33/54 , G01R33/561
摘要： A magnetic resonance imaging system (100) acquires magnetic resonance data (142) from a subject (118) within a measurement zone (108). Pulse sequence commands (140) control the magnetic resonance imaging system to acquire the magnetic resonance data according to a magnetic resonance fingerprinting protocol. The pulse sequence commands are configured for controlling the magnetic resonance imaging system to repeatedly generate an RF pulse train (300) and acquire the magnetic resonance data as multiple k-space traces. The machine executable instructions causes the processor to: sequentially acquire (200) the multiple k-space traces of magnetic resonance data by controlling the magnetic resonance imaging system with pulse sequence commands and calculate (202) the abundance of each of a set of predetermined substances for k-space traces that are acquired after a predetermined number of k-space traces of the multiple k-space traces has been acquired and the acquired magnetization has reached a steady state. The abundance of each of a set of predetermined substances is determined by comparing the magnetic resonance data with a steady state magnetic resonance fingerprinting dictionary (144) which contains a listing of calculated magnetic resonance signals in response to the RF pulse train for a set of predetermined substances.
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公开(公告)号：US10251579B2
公开(公告)日：2019-04-09
申请号：US15875063
申请日：2018-01-19
发明人： Steffen Weiss , Ronaldus Frederik Johannes Holthuizen , Sascha Krueger , Peter Koken , Daniel Wirtz , Thomas Erik Amthor , Falk Uhlemann
摘要： A medical apparatus (1100) comprising a magnetic resonance imaging system and an interventional device (300) comprising a shaft (302, 1014, 1120). The medical apparatus further comprises a toroidal magnetic resonance fiducial marker (306, 600, 800, 900, 1000, 1122) attached to the shaft. The shaft passes through a center point (610, 810, 908, 1006) of the fiducial marker. The medical apparatus further comprises machine executable instructions (1150, 1152, 1154, 1156, 1158) for execution by a processor. The instructions cause the processor to acquire (100, 200) magnetic resonance data, to reconstruct (102, 202) a magnetic resonance image (1142), and to receive (104, 204) the selection of a target volume (1118, 1144, 1168). The instructions further cause the processor to repeatedly: acquire (106, 206) magnetic resonance location data (1146) from the fiducial marker and render (108, 212) a view (1148, 1162) indicating the position of the shaft relative to the target zone.
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6.发明授权公开(公告)号：US10245447B2
公开(公告)日：2019-04-02
申请号：US14349333
申请日：2012-09-25
发明人： Thomas Erik Amthor , Falk Uhlemann , Sascha Krueger , Steffen Weiss , Ronaldus Frederik Johannes Holthuizen , Daniel Wirtz , Peter Koken
IPC分类号： A61N5/10
摘要： The invention provides for a medical apparatus (200, 300, 400) comprising: a magnetic resonance imaging system (202), a display (270), a processor (228), and a memory (234) for storing instructions for the processor. The instructions causes the processor to receive a brachytherapy treatment plan (240), acquire (100) planning magnetic resonance data (244), calculate (102) a catheter placement positions (246, 900, 902) and a catheter control commands (248) the brachytherapy catheters. The instructions cause the processor, for each catheter placement position, to repeatedly: acquire (106) guidance magnetic resonance data (250), reconstruct (108) an image (252, 500), display (110) the image and the catheter placement position on the display, receive (114) a catheter inserted signal from a user interface, segment (116) the image to determine the catheter placement position after receiving the catheter inserted signal, recalculate (116) the catheter placement positions for each remaining catheter placement position after receiving the catheter inserted signal, and recalculate (116) the catheter control command for all of the multiple catheters after receiving the catheter inserted signal.
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7.发明申请PREDICTION, SCORING, AND CLASSIFICATION OF MAGNETIC RESONANCE CONTRAST USING CONTRAST SIGNAL SCORING EQUATION 有权使用对比信号分级方程的磁共振对比度的预测，分类和分类公开(公告)号：US20150216440A1
公开(公告)日：2015-08-06
申请号：US14414552
申请日：2013-07-10
发明人： Julien Senegas , Peter Koken
CPC分类号： A61B5/055 , A61B5/7225 , A61B5/7264 , A61B5/742 , A61B5/746 , A61B5/7475 , A61B2560/0475 , A61B2576/00 , G01R33/543 , G01R33/5601 , G01R33/5602 , G06F19/00 , G16H40/63
摘要： A magnetic resonance imaging sequence is defined by an imaging protocol and parameter values for a set of parameters of the imaging protocol. A contrast signal score is computed for the magnetic resonance imaging sequence respective to a contrast type to be scored using a scoring equation. A contrast type is determined for the magnetic resonance imaging sequence based on the computed contrast signal score. In one approach, the computing is repeated for a plurality of different contrast types to be scored, and the determining is based on the computed contrast signal scores.
摘要翻译： 磁共振成像序列由成像协议和成像协议的一组参数的参数值定义。 计算对应于使用评分方程进行评分的对比度类型的磁共振成像序列的对比度信号得分。 基于所计算的对比度信号得分确定磁共振成像序列的对比度类型。 在一种方法中，重复对多种不同对比度类型进行计算，并且该确定基于所计算的对比度信号得分。
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公开(公告)号：US11579230B2
公开(公告)日：2023-02-14
申请号：US16468849
申请日：2017-12-06
IPC分类号： G01R33/561 , G01R33/50 , G01R33/56 , G01R33/54 , G06T11/00 , G06T7/00 , G06K9/00 , G16H30/20 , G06V20/64
摘要： The invention provides for a magnetic resonance imaging system (100) for acquiring magnetic resonance data (142) from a subject (118) within a measurement zone (108). The magnetic resonance imaging system (100) comprises: a processor (130) for controlling the magnetic resonance imaging system (100) and a memory (136) storing machine executable instructions (150, 152, 154), pulse sequence commands (140) and a dictionary (144). The pulse sequence commands (140) are configured for controlling the magnetic resonance imaging system (100) to acquire the magnetic resonance data (142) of multiple steady state free precession (SSFP) states per repetition time. The pulse sequence commands (140) are further configured for controlling the magnetic resonance imaging system (100) to acquire the magnetic resonance data (142) of the multiple steady state free precession (SSFP) states according to a magnetic resonance fingerprinting protocol. The dictionary (144) comprises a plurality of tissue parameter sets. Each tissue parameter set is assigned with signal evolution data pre-calculated for multiple SSFP states.
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公开(公告)号：US11085985B2
公开(公告)日：2021-08-10
申请号：US16627827
申请日：2018-07-03
摘要： A magnetic resonance imaging (MRI) system includes a memory for storing machine executable instructions and MRF pulse sequence commands. The MRF pulse sequence commands are configured for controlling the MRI system to acquire MRF magnetic resonance data according to a magnetic resonance fingerprinting protocol. The memory further includes a Fourier transformed magnetic resonance finger printing dictionary. The finger printing dictionary includes entries for at least one intrinsic property.
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10.发明授权公开(公告)号：US11041925B2
公开(公告)日：2021-06-22
申请号：US16339405
申请日：2017-09-22
摘要： A processor controls an MRI system with pulse sequence commands to acquire magnetic resonance data according to a magnetic resonance fingerprinting protocol during multiple pulse repetitions. The pulse sequence commands control the magnetic resonance imaging system to cause gradient induced spin rephasing at least twice during each of the multiple pulse repetitions, and to acquire at least two magnetic resonance signals during each of the multiple pulse repetitions. Each of the at least two magnetic resonance signals is measured during a separate one of the gradient induced spin rephasing. The magnetic resonance data includes the at least two magnetic resonance signals acquired during each of the multiple pulse repetitions. The processor further at least partially calculates a B0-off-resonance map using the magnetic resonance data, and generates at least one magnetic resonance parametric map by comparing the magnetic resonance data with a magnetic resonance fingerprinting dictionary.
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