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1. 发明专利

JP2008161404A Magnetic resonance inspection device 有权
标题翻译：磁共振检测装置
公开(公告)号：JP2008161404A
公开(公告)日：2008-07-17
申请号：JP2006353697
申请日：2006-12-28
申请人： Hitachi Ltd , Hitachi Medical Corp , 株式会社日立メディコ , 株式会社日立製作所
发明人： NINOMIYA ATSUSHI , KASAI YOSHI , OCHI HISAAKI , TSUCHIHATA MASAYOSHI , MIYAMOTO YOSHIYUKI , NAGAI SHIZUKA
IPC分类号： A61B5/055 , G01R33/34
CPC分类号： G01R33/3415 , A61B5/055 , G01R33/34007 , G01R33/34084
摘要： PROBLEM TO BE SOLVED: To suppress the increase of the number of channels and to provide a reception coil for vertical magnetic field type MRI usable in a wide area. SOLUTION: A reception coil unit 500 includes a bed coil unit 600 for matching the longitudinal direction with the body axial direction of an inspection object 103 and an upper coil unit 700 detachably attached to the bed coil unit 600. The bed coil unit 600 is provided with a plurality of lower sub coils disposed at the lower part of a mounting surface 601, and the upper coil unit 700 is provided with a plurality of upper sub coils connected with the lower sub coils. The upper sub coil is divided into a flexible inner side support 20-1 covering the mounting surface 601 and a flexible outer side support 20-2 covering the outer side of the inner side support 20-1 and disposed. The upper sub coils and the lower sub coils are connected by attaching the upper coil unit 700 to the bed coil unit 600 to form two or more kinds of sub coils. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：为了抑制通道数的增加，并且提供可用于广域的垂直磁场型MRI的接收线圈。解决方案：接收线圈单元500包括用于使纵向方向与检查对象103的主体轴向匹配的床线圈单元600和可拆卸地附接到床线圈单元600的上线圈单元700.床线圈单元 600设置有设置在安装表面601的下部的多个下部子线圈，并且上部线圈单元700设置有与下部子线圈连接的多个上部子线圈。上副线圈分为覆盖安装面601的柔性内侧支撑20-1和覆盖内侧支撑件20-1的外侧的柔性外侧支撑20-2，并配置。上副线圈和下子线圈通过将上线圈单元700附接到床线圈单元600而连接，以形成两种或更多种子线圈。版权所有（C）2008，JPO＆INPIT

2. 发明专利

JP2004222752A Examination apparatus using nuclear magnetic resonance 审中-公开
公开(公告)号：JP2004222752A
公开(公告)日：2004-08-12
申请号：JP2003010510
申请日：2003-01-20
申请人： Hitachi Ltd , Hitachi Medical Corp , 株式会社日立メディコ , 株式会社日立製作所
发明人： OCHI HISAAKI , AZUMA TAKASHI , UMEMURA SHINICHIRO , TANIGUCHI AKIRA
IPC分类号： G01R33/28 , A61B5/055
摘要： PROBLEM TO BE SOLVED: To provide examination apparatus allowing an electrocautery surgery without deteriorating an MR image during the imaging of the MR image. SOLUTION: This examination apparatus is provided with a means controlling a timing of imaging by the MRI device synchronously with a timing of the transmission of a high frequency current of an electrocautery, and sets a time interval of transmission the high frequency current of the electrocautery to a time interval excluding a time of irradiating RF pulses of the MRI and a time of receiving the MR signals. A diode switch is connected to a part of paired pole plates and turns on a diode synchronously with the timing of the transmission of the high frequency current of the electrocautery. This examination apparatus allows the use of the electrocautery while imaging the MR image and prevents the deterioration of the MR image. COPYRIGHT: (C)2004,JPO&NCIPI

3. 发明专利

JP2003111744A EXAMINATION EQUIPMENT USING NUCLEAR MAGNETIC RESONANCE AND ADJUSTING METHOD FOR TILTED MAGNETIC FIELD WAVEFORM 审中-公开
公开(公告)号：JP2003111744A
公开(公告)日：2003-04-15
申请号：JP2001305928
申请日：2001-10-02
申请人： HITACHI LTD , HITACHI MEDICAL CORP
发明人： ITAGAKI HIROYUKI , OCHI HISAAKI
IPC分类号： G01R33/48 , A61B5/055 , G01R33/387
摘要： PROBLEM TO BE SOLVED: To provide an examination equipment using nuclear magnetic resonance where image is improved. SOLUTION: After exciting nuclear magnetization in a prescribed area by successively applying a high-frequency magnetic field and tilted magnetic fields in first, second and third directions orthogonal to each other to an examination object or applying the high-frequency magnetic field and the tilted magnetic fields in the second or third direction to the examination object, the tilted magnetic field in the second or third direction having a tilted magnetic field waveform WS set in advance is applied and a magnetic resonance signal generated from the examination object is detected. A tilted magnetic field waveform WR actually applied to a prescribed area by the tilted magnetic field in the second or third direction having the tilted magnetic field waveform WS is led out by arithmetic processing from a nuclear magnetic resonance signal detected in advance to obtain the output gain of a driving power source for the tilted magnetic field in the second or third direction which minimizes a difference ΔW between the tilted magnetic field waveform WS and the tilted magnetic field waveform WR. Then the led-out output gain is set to the driving power source. Consequently, waveform distortion in the tilted magnetic field is detected and removed and the quality of an MRI image is improved.

4. 发明专利

JPH07289532A INSPECTING SYSTEM USING NUCLEAR MAGNETIC RESONANCE 失效
公开(公告)号：JPH07289532A
公开(公告)日：1995-11-07
申请号：JP8436394
申请日：1994-04-22
申请人： HITACHI LTD , HITACHI MEDICAL CORP
发明人： OCHI HISAAKI , YAMAMOTO ETSUJI , ONODERA YUKARI , ITAGAKI HIROYUKI
IPC分类号： G01R33/48 , A61B5/055 , G01N33/48
摘要： PURPOSE:To provide a method to easily decide the optimum photographing condition when brain function analysis is performed by using nuclear magnetic resonance without requiring the skill of an operator. CONSTITUTION:A same stimulus is applied for plural times, and the photographing condition of an area in which signal strength is increased synchronizing with each stimulus is changed so as to increase a photographing condition decision function value, and the photographing condition in which the maximum photographing condition decision function value can be obtained is automatically decided as the optimum photographing condition for an examinee.

5. 发明专利

JPH0751247A ENDOSCOPE PROBE FOR MRI AND MRI DEVICE USING THE ENDOSCOPE PROBE 失效
公开(公告)号：JPH0751247A
公开(公告)日：1995-02-28
申请号：JP20491893
申请日：1993-08-19
申请人： HITACHI LTD , HITACHI MEDICAL CORP
发明人： OCHI HISAAKI , YAMAMOTO ETSUJI , KATAKURA KAGEYOSHI , KOIZUMI HIDEAKI
IPC分类号： A61B1/00 , A61B5/0215 , A61B5/055
摘要： PURPOSE:To carry out the photographing of the wall of a blood vessel and the measuring of the blood pressure concurrently by composing an endoscope for MRI and a sensor for blood pressure measuring integrally, and inserting such a device to a measuring part. CONSTITUTION:The cable 32 for power feeding of a loop antenna 31 is formed along a catheter 30 so as to integrate an endoscope for MRI and a catheter for blood pressure measuring, and by covering the loop antenna 31 and the cable 32 for power feeding with an insulating membrane 33, an electric shock of a patient is prevented. And by making a condenser 34 at the power feeding member variable, the frequency band scope is made to fit to the resonance frequency intrinsic to an atomic nucleus to photograph the frequency band scope. When this MRI device is used, the endoscope probe is inserted to the part to measure, and the minute structure of the blood vessel wall or the valve of the heart are photographed in the well known technology in the MRI field, and at the same time, the blood pressure wave form is measured by an electric pressure gauge installed to the terminal opposite to the blood vessel inserting end of the catheter 30.

6. 发明专利

JP2009045361A Magnetic resonance imaging apparatus 有权
标题翻译：磁共振成像装置
公开(公告)号：JP2009045361A
公开(公告)日：2009-03-05
申请号：JP2007216331
申请日：2007-08-22
申请人： Hitachi Ltd , Hitachi Medical Corp , 株式会社日立メディコ , 株式会社日立製作所
发明人： TSUCHIHATA MASAYOSHI , OCHI HISAAKI , NAGAI SHIZUKA , MIYAMOTO YOSHIYUKI , NINOMIYA ATSUSHI , KASAI YOSHI
IPC分类号： A61B5/055 , G01R33/34
摘要： PROBLEM TO BE SOLVED: To provide a magnetic resonance imaging apparatus having a receiving coil capable of imaging an optional cross section in a wide range such as a whole body at a high speed. SOLUTION: An inner coil unit 501, or a first coil layer, has a sensitivity distribution in the RL direction, is movable singularly, and is usable for a horizontal magnetic field type MRI apparatus and a vertical magnetic field type MRI apparatus. An inner coil unit 502 and an upper coil unit 503, or a second coil layer, and has a sensitivity distribution in the HF direction so that, when performing a parallel imaging executed by setting a phase encoding direction to the RL direction or the HF direction, this constitution can attain the high speed imaging by operating a corresponding coil layer on condition that the first coil layer and the second coil layer are formed and operated together. An external coil unit 504, or a third coil layer, has a sensitivity distribution in the AP direction. The first, second and third coil layers are combinedly operated to image the optional cross section in the wide range at the high speed. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种磁共振成像装置，其具有能够高速成像诸如全身的宽范围内的可选横截面的接收线圈。解决方案：内线圈单元501或第一线圈层在RL方向上具有灵敏度分布，可单独移动，并且可用于水平磁场型MRI设备和垂直磁场型MRI设备。内线圈单元502和上线圈单元503或第二线圈层，并且在HF方向上具有灵敏度分布，使得当通过将相位编码方向设置为RL方向或HF方向执行并行成像时这种结构可以在第一线圈层和第二线圈层一起形成和操作的条件下通过操作相应的线圈层而获得高速成像。外部线圈单元504或第三线圈层在AP方向上具有灵敏度分布。第一，第二和第三线圈层被组合地操作以在宽范围内以高速成像可选的横截面。版权所有（C）2009，JPO＆INPIT

7. 发明专利

JPH08589A INSPECTION APPARATUS USING MAGNETIC RESONANCE 失效
公开(公告)号：JPH08589A
公开(公告)日：1996-01-09
申请号：JP13684394
申请日：1994-06-20
申请人： HITACHI LTD , HITACHI MEDICAL CORP
发明人： YAMAMOTO ETSUJI , ONODERA YUKARI , TANIGUCHI AKIRA , ITAGAKI HIROYUKI , OCHI HISAAKI , NISHIMURA HIROSHI , TAKEUCHI HIROYUKI
IPC分类号： G01R33/389 , A61B5/055
摘要： PURPOSE:To locally decrease gradient magnetic fields generated by a first gradient magnetic field coil by forming this first gradient magnetic field coil as a coil fixed to a magnet and constituting a second gradient magnetic field coil so as to nearly negate the gradient magnetic fields generated by the first gradient magnetic field coil in the specific region of an object to be inspected. CONSTITUTION:The output of the high-frequency pulse generator of an MRI apparatus is amplified by a high-frequency power amplifier to excite the coil 4. The signal received by the coil 4 is subjected to A/D conversion by an A/D converter and is then converted to an image by a signal processing system. This image is displayed by a display device. The small-sized gradient magnetic field coil 22 driven by a current amplifier 23 is installed in addition to the large-sized gradient magnetic field coil 21. The gradient magnetic field coil 22 is so operated as to negate the magnetic field generated by the gradient magnetic field coil 21 only in the specific section of the object to be inspected. As a result, the gradient magnetic fields exclusive of the photographing section are decreased and the uncomfortable feel acting on the object to be inspected is lowered. Photographing is thus executed with excellent safety.

8. 发明专利

JPH07184874A APPARATUS FOR INSPECTION USING MAGNETIC RESONANCE 失效
公开(公告)号：JPH07184874A
公开(公告)日：1995-07-25
申请号：JP33051593
申请日：1993-12-27
申请人： HITACHI LTD , HITACHI MEDICAL CORP
发明人： YAMAMOTO ETSUJI , OCHI HISAAKI , ITAGAKI HIROYUKI , ONODERA YUKARI , TAKEUCHI HIROYUKI
IPC分类号： G01R33/387 , A61B5/055
摘要： PURPOSE:To provide an inspection apparatus wherein magnetic resonance in which vortex electric current generated with change of inclined magnetic field is decreased with time is used. CONSTITUTION:A bobbin of a main inclined magnetic field coil 21 and a bobbin of a correction inclined magnetic field coil 23 fixed on a magnet 11 for generating static magnetic field are completely separated each other and the main inclined magnetic field coil 21 is movable in the direction (z) of the static magnetic field. The strength of the inclined magnetic field per unit electric current generated at the center by each of both inclined magnetic fields 21 and 23 differs largely from each other and, as the result, the inclined magnetic field substantially generated as a difference of both cases and the electric current-magnetic field inversion efficiency becomes high. As only the main inclined magnetic field coil 21 is moved, the supporting structure can be made to be light-weight. As the amt. of correction for the vortex electric current, as it is proportional to the strength and the ratio of change with time of the magnetic field generated by the main inclined magnetic field 21, the centers of both inclined magnetic fields can be made to coincide with each other and the effect of the correction can be made smooth in the inspecting space. As the result, high image quality is obtd. in ultrahigh speed photographing.

9. 发明专利

JP2001212104A MAGNETIC RESONANCE IMAGING DEVICE AND RECEIVING COIL 失效
公开(公告)号：JP2001212104A
公开(公告)日：2001-08-07
申请号：JP2000023985
申请日：2000-02-01
申请人： HITACHI LTD , HITACHI MEDICAL CORP
发明人： OCHI HISAAKI , TANIGUCHI AKIRA
IPC分类号： A61B5/055 , G01B7/00 , G01R33/48
摘要： PROBLEM TO BE SOLVED: To achieve suitability for an intervention MRI by improving real time performance in an MRI image display. SOLUTION: Information on position in the direction of moving is given to a magnetic resonance signal by moving a receiving coil 116 for altering the position. The receiving coil 116 has a plurality (N) of subcoils 2-1-2-4 arranged in an array as spaced at a fixed interval and the magnetization distribution of an object along the direction of moving is determined by an analytic computation based on the plurality of magnetic resonance signals sampled at each of the subcoils and the reception sensitivity distribution of the subcoils. As a result, the number or matrixes of a determinant involved in the analytic computation is reduced to 1/N. This can shorten the computation time of a reverse matrix computation to 1/N2 to achieve a shortening of photographing time up to the display of an image from the starting of photographing thereby improving the real time performance of MRI.

10. 发明专利

JP2000237164A MRI DEVICE 失效
公开(公告)号：JP2000237164A
公开(公告)日：2000-09-05
申请号：JP4593699
申请日：1999-02-24
申请人： HITACHI LTD , HITACHI MEDICAL CORP
发明人： OCHI HISAAKI , HIRATA TOMOTSUGU , ITAGAKI HIROYUKI , TSUKADA KEIJI
IPC分类号： A61B5/055 , A61B17/34 , A61B19/00 , G01R33/54
摘要： PROBLEM TO BE SOLVED: To allow an operator to easily recognize the position of a marker provided on a surgical instrument inserted into a body in an interventional MRI. SOLUTION: A material containing 19F having a resonance frequency in the frequency band 47 cut off by a digital filter is used as a marker 41, the actual position of the marker 41 is calculated from the image 42 of the marker 41 appearing on the outside of the visual field, and the actual position of the marker 41 is displayed in color. The position of the marker 41 is displayed without being confounded with ambient organs, and an operator can easily recognize the position of the marker 41 without preparing an RF transceiver dedicated to 19F.

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