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41. 发明专利

JPS61124855A Method for leading out image information using nuclear magnetic resonance 失效
标题翻译：使用核磁共振引导图像信息的方法
公开(公告)号：JPS61124855A
公开(公告)日：1986-06-12
申请号：JP24692884
申请日：1984-11-21
申请人： Asahi Chem Ind Co Ltd
发明人： YAMASHITA MASAYA
IPC分类号： A61B10/00 , A61B5/055 , G01R33/48 , G01R33/567
CPC分类号： G01R33/567
摘要： PURPOSE:To obtain image information reduced in the deterioration of an image by an artifact, by performing the collection of data so as not to stepwise change the integrated value of the intensity of an inclined magnetic field and a magnetic field applying time and subsequently rearranging the data to perform the processing thereof. CONSTITUTION:In replacing an inclined magnetic field (GZ) pulse for performing phase encoding, when a data collection timing interval is set to Tr=1sec, the cycle of the displacement of an abdominal part is Tp=4sec and, therefore, four displacement states are taken at each cycle and a rearranged data system is divided into four groups and each group is set to one of four displacement states. As shown by F, the GZ pulse is changed at every 64pi in a range from -128pi to 127pi. Thus obtained nuclear magnetic resonance data system is rear ranged as shown by G so as gradually change the integration value of GZ and the time before sampling the same. At this time, the displacement component by respiration contained in this data system is divided into four groups as shown by M and becomes almost equivalent to respiration performed once for 256sec.
摘要翻译：目的：为了通过伪影获得减少图像劣化的图像信息，通过执行数据的采集，以便不逐步改变倾斜磁场强度和磁场施加时间的积分值，并且随后重新排列数据进行处理。构成：在更换用于执行相位编码的倾斜磁场（GZ）脉冲时，当数据采集定时间隔设置为Tr = 1sec时，腹部位移的周期为Tp = 4秒，因此，四个位移状态在每个周期被采取，并且重新排列的数据系统被分成四组，并且每组被设置为四个位移状态之一。如F所示，GZ脉冲在-128pi至127pi的范围内每64pi变化一次。如此获得的核磁共振数据系统如G所示在后方，因此逐渐改变GZ的积分值和采样之前的时间。此时，包含在该数据系统中的呼吸位移分量被分成如M所示的四组，几乎等于256秒进行一次呼吸。

42. 发明专利

JPS60190846A Nuclear magnetic reasonance apparatus 失效
标题翻译：核磁共振装置
公开(公告)号：JPS60190846A
公开(公告)日：1985-09-28
申请号：JP4577384
申请日：1984-03-10
申请人： Jeol Ltd
发明人： EGUCHI KEIJI , KOMATSU KUNIHITO
IPC分类号： A61B10/00 , A61B5/055 , G01R33/32 , G01R33/341 , G01R33/3415 , G01R33/46 , G01R33/48 , G01R33/567
CPC分类号： G01R33/46 , G01R33/3415
摘要： PURPOSE: To obtain image information without using a gradient magnetic field, by successively irradiating the object to be measured in a static magnetic field with high frequency pulses from a plurality of transmitting receiving coils through a change-over means and separately taking out NMR signals to store the same.
CONSTITUTION: A coil assembly 3 consisting of transmitting receiving coils L
1 W L
25 arranged in a 5×5 matrix state is arranged so as to be contacted with an object 2 to be measured arranged in the static magnetic field by a magnet 1. High frequency pulses generated through an oscillator 6, a gate 7 and an amplifier 8 are successively supplied to the coils L
1 WL
25 through a change-over switch 9 and FID signals after the irradiation of high frequency pulses are sent to a computer 12 from the coils L
1 WL
25 through a receiving circuit 10 and an AD converter 11 and stored in memory 13. The NMR spectrum obtained by Fourier conversion in the computer 12 is stored in memory 14 while the distribution of spin density obtained from the distribution of peak intensity is stored in memory 15 to be displayed as an image by a display apparatus 16.
COPYRIGHT: (C)1985,JPO&Japio
摘要翻译：目的：为了在不使用梯度磁场的情况下获得图像信息，通过经由转换装置从多个发送接收线圈以高频脉冲在静态磁场中连续照射被测量物体，并分别取出NMR信号存储相同。构成：将以5X5矩阵状态排列的发送接收线圈L1-L25组成的线圈组件3配置成与被磁体1在静止磁场中排列的被测定体2接触。高频脉冲通过振荡器6，门7和放大器8通过转换开关9连续提供给线圈L1-L25，并且在将高频脉冲照射之后的FID信号从线圈L1-L25传送到计算机12 接收电路10和AD转换器11并存储在存储器13中。通过计算机12中的傅里叶变换获得的NMR谱存储在存储器14中，同时从峰强度分布获得的自旋密度的分布存储在存储器15中由显示装置16显示为图像。

43. 发明专利

JPS59155239A Diagnostic nuclear magnetic resonance apparatus 失效
标题翻译：诊断核磁共振装置
公开(公告)号：JPS59155239A
公开(公告)日：1984-09-04
申请号：JP2870183
申请日：1983-02-23
申请人： Toshiba Kk
发明人： KAWACHI TATSUHIKO
IPC分类号： A61B10/00 , A61B5/055 , G01R33/48 , G01R33/567
CPC分类号： G01R33/5673
摘要： Nuclear magnetic resonance diagnostic apparatus which forms an image of a slice of an object, including an apparatus for detecting NMR signals induced from an object with a condenser and a resonance circuit being provided with a receiving coil which surrounds the object, peakhold means for receiving the NMR signals generated from the resonance circuit to retain the maximum value in the NMR signals in the predetermined order which are picked up in every excitation cycle of the spins, and means for controlling the selection of the NMR signals when the retained value by the peak-hold means is in the synchronous level set previously, utilizing the variation of the NMR signal level in accordance with the variation of floating capacitance of the resonance circuit, which is altered according to the living motion of the object, to detect the state of the living motion, while thereby selecting the NMR signals in the predetermined state to utilize them into image reconstruction.

45. 发明专利

JP4773612B2 Breathing displacement and speed of the measurement method using the navigator magnetic resonance imaging echo signal 有权
公开(公告)号：JP4773612B2
公开(公告)日：2011-09-14
申请号：JP2000378250
申请日：2000-12-13
申请人：ゼネラル・エレクトリック・カンパニイ
发明人：イーピン・ピー・ドゥ , エリオット・アール・マクベイグ
IPC分类号： A61B5/055 , G01R33/54 , G01R33/48 , G01R33/567
CPC分类号： G01R33/5676
摘要： Navigator signals (348) are acquired during a cardiac gated MRI scan to measure the position and velocity components of respiratory motion. Acquired cardiac image views are discarded and/or corrected based on the measurement of the positional and velocity components of respiratory motion to reduce motion artifacts. In one embodiment the navigator pulse sequence includes velocity encoding gradient (340, 356), and in a second embodiment, velocity is determined by measuring the change in diaphragm position between successive navigator pulse sequences (324, 236).

46. 发明专利

JP4582516B2 Non-selective and mr perfusion image acquisition method and device using the rf saturation pulse having a notch 有权
公开(公告)号：JP4582516B2
公开(公告)日：2010-11-17
申请号：JP2004304987
申请日：2004-10-20
申请人：ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー
发明人：トマス・ケーエフ・フー
IPC分类号： A61B5/055 , G01R33/28 , G01R33/48 , G01R33/54 , G01R33/563 , G01R33/567
CPC分类号： G01R33/56366 , G01R33/281 , G01R33/56308
摘要： A non-selective saturation pulse together with a series of notched RF saturation pulses are used to acquire MR perfusion data. The non-selective saturation recovery RF pulse is non-selective and is designed to be effective at blood pool suppression for a first slice as well as a next slice in a series of slice locations. The first slice. location may be placed at an angle or plane that is not necessarily coaxial with the other slice locations to be imaged. The present invention supports the acquisition of MR data with efficient spatial coverage and a calibration slice of data that provides a linear measure of signal intensity versus contrast concentration in a blood pool.

47. 发明专利

JP4547053B2 Signal processing method and a three-dimensional mr imaging system for 3D imaging mr 有权
公开(公告)号：JP4547053B2
公开(公告)日：2010-09-22
申请号：JP22475799
申请日：1999-08-09
申请人：ゼネラル・エレクトリック・カンパニイGeneral Electric Company
发明人：ジェ・フェング・シェン , ジェイスン・エイ・ポルジン
IPC分类号： A61B5/055 , G01R33/20 , G01R33/54 , G01R33/567
CPC分类号： G01R33/5673 , G01R33/4822
摘要： A method is provided for 3-D MR imaging of structure such as a cardiac region of a subject, which is disposed to cyclical motion. The method comprises detecting commencement of each of a succession of motion cycles, and acquiring a set of MR views of the region during each motion cycle. Each view is at a known radial distance from the center (48) of a two-dimensional k-space (50), and each set includes a view of lowest spatial frequency (38d-44d), which is located proximate to the k-space center (48). The order in which the views of respective sets are acquired is selected so that the lowest frequency views (38d-44d) of respective sets are each acquired at the same specified time, following commencement of their respectively corresponding motion cycles. The views of each set collectively define a segment in the k-space, respective segments being placed in an interleaved spiral or elliptical arrangement with respect to one another.

48. 发明专利

JP4222773B2 System for correlating the physiological data an Mr image 有权
公开(公告)号：JP4222773B2
公开(公告)日：2009-02-12
申请号：JP2002120108
申请日：2002-04-23
申请人：ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー
发明人：ボー・ジェイ・ペッターソン , ロバート・ホールデン・ハワース
IPC分类号： A61B5/055 , G01R33/48 , A61B5/0456 , G01R33/567
CPC分类号： A61B5/7289 , A61B5/0456 , A61B5/055 , G01R33/5673
摘要： An MR system correlates MR images with acquired physiological data. MR image data and physiological data is acquired through two independent pipelines. Both pipelines range from analog to digital conversion to image or data display. The pipelines are synchronized by triggers calculated from data contained in the physiological pipeline which are then used to trigger the acquisition of data in the MR image pipeline. Another embodiment includes time synchronization of a distributed acquisition and processing system having the ability to correlate physiological and MR data using a common time base and the ability to selectively store physiological data. Simplified network time protocol is used to synchronize timers and a separate data conduit is used for sending physiological data to the data store process. This supports different modes of synchronization between acquisition and the physiological signal.

49. 发明专利

JP4084559B2 Magnetic resonance apparatus 有权
公开(公告)号：JP4084559B2
公开(公告)日：2008-04-30
申请号：JP2001346139
申请日：2001-11-12
申请人：シーメンスアクチエンゲゼルシヤフトSiemens Aktiengesellschaft
发明人：テーゼンシュテファン
IPC分类号： A61B5/055 , G01R33/48 , G01R33/567
CPC分类号： G01R33/5676 , A61B5/055
摘要： Method for operating a magnetic resonance imaging device in which a positional change in the area to be imaged relative to the imaging volume of the device is detected using orbital navigation echoes. The method has the following characteristics: a reference data set is produced with a number of data points; with the data points as depicted in k-space lying on a partial spherical surface so that the surface is occupied; the partial surface extends over a great circle of a sphere at least by the maximum amount an expected angular displacement of the examination area could take place and; to measure the displacement a data set of an orbital navigation echo is compared with the reference set.

50. 发明专利

JPWO2005023107A1 磁気共鳴イメージング装置有权
公开(公告)号：JPWO2005023107A1
公开(公告)日：2007-11-01
申请号：JP2005513671
申请日：2004-09-03
申请人：株式会社日立メディコ
发明人：板垣　博幸 , 博幸板垣 , 後藤　智宏 , 智宏後藤 , 谷井　由美子 , 由美子谷井 , 高橋　哲彦 , 哲彦高橋
IPC分类号： A61B5/055 , G01R33/28 , G01R33/48 , G01R33/563 , G01R33/567
CPC分类号： G01R33/563 , G01R33/5601 , G01R33/5602 , G01R33/5614 , G01R33/5635 , G01R33/565 , G01R33/56509 , G01R33/5673 , G01R33/5676
摘要：プリサチュレーションパルスを印加するパルスシーケンスを用いて、被検体の体動に同期して撮影する際に、エコー信号強度のばらつきと、これが原因となって発生する画像上のアーチファクトを低減させる。特に、遅延造影撮影における、心室内の血液に由来するアーチファクトを防止する。そのめたに、エコー信号を計測する前に、縦磁化を所望の状態に調整するIRパルス等を印加することによって、エコー信号強度のばらつきを抑制してアーチファクトを防止する。

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