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91. 实用新型

JPS6319073Y2 失效
公开(公告)号：JPS6319073Y2
公开(公告)日：1988-05-27
申请号：JP11025281
申请日：1981-07-27
IPC分类号： A61B5/0265 , A61B5/02 , A61M1/14

92. 发明专利

JPS6363448A MAGNETIC RESONANCE IMAGING APPARATUS 失效
公开(公告)号：JPS6363448A
公开(公告)日：1988-03-19
申请号：JP20825586
申请日：1986-09-04
申请人： TOSHIBA CORP
发明人： OKAMOTO KAZUYA
IPC分类号： A61B5/0265 , A61B5/02 , A61B5/055 , A61B10/00

93. 发明专利

JPS6213013B2 失效
公开(公告)号：JPS6213013B2
公开(公告)日：1987-03-23
申请号：JP10744177
申请日：1977-09-07
申请人： ASAHI MEDICAL CO
发明人： YAMAKOSHI KENICHI
IPC分类号： A61B5/02 , A61B5/022 , A61B5/0235 , A61B5/026 , A61B5/0265 , A61B5/053 , G01F1/56 , G01R27/02

94. 发明专利

JPS6211439A NMR BLOOD FLOW IMAGING SYSTEM 失效
公开(公告)号：JPS6211439A
公开(公告)日：1987-01-20
申请号：JP15019485
申请日：1985-07-10
申请人： HITACHI LTD
发明人： SANO KOICHI , YOKOYAMA TETSUO , TAKEDA RYUSABURO , OZAWA YASUHIKO
IPC分类号： G01P5/00 , A61B5/02 , A61B5/0265 , A61B5/055 , A61B10/00 , G01N24/08 , G01P5/18 , G01P13/00 , G01R33/44 , G01R33/48

95. 发明专利

JPS6155379B2 失效
公开(公告)号：JPS6155379B2
公开(公告)日：1986-11-27
申请号：JP3225282
申请日：1982-03-03
申请人： NIPPON KODEN KOGYO KK
发明人： OOSE YASUSHI , OGAWA KEIKITSU
IPC分类号： A61B5/0265 , A61B5/02

96. 发明专利

JPS61119253A Magnetic nuclear resonance imaging method 失效
标题翻译：磁核共振成像方法
公开(公告)号：JPS61119253A
公开(公告)日：1986-06-06
申请号：JP17442185
申请日：1985-08-09
申请人： Gen Electric
发明人： MASHIYUU ODONERU
IPC分类号： G01P13/00 , A61B5/02 , A61B5/0265 , A61B5/055 , A61B10/00 , G01F1/716 , G01R33/48 , G01R33/563
CPC分类号： G01R33/56308 , G01R33/56316
摘要： A method for magnetic resonance imaging of fluid flow, and particularly in vivo blood flow, uses multiple-echo phase-contrast sequences of signals both in the magnetic field gradient in the direction in which fluid flow is to be determined, and in the radio-frequency (RF) magnetic field utilized with the magnetic field gradient. The magnetic field gradient has a pair of phase-encoding pulses having a zero mean value effect upon the sample, either alone or with inversion by an intermediate 180 DEG RF pulse signal. A first multi-echo sequence, provided with the phase-encoding pulse pair, provides information of both the amplitude and phase-shift of each pixel of the imaged flowing material while a second multiple echo sequence, devoid of the phase-encoding-gradient pulses, provides information as to the amplitude and the undesired initial phase-shift of each pixel of both stationary and flowing material. Information provided responsive to the second sequence is subtracted from the information provided responsive to the first sequence to provide an image having an intermediate grey-scale value for stationary sample material and with differential grey-scale encoding for differential flow velocities of fluid passing through the image plane.

97. 实用新型

JPS6061005U 失效
公开(公告)号：JPS6061005U
公开(公告)日：1985-04-27
申请号：JP15142383
申请日：1983-09-30
IPC分类号： A61B5/0265 , A61B5/02

98. 发明专利

JPS5975037A Method and apparatus for measuring fluid flow amount 失效
标题翻译：测量流体流量的方法和装置
公开(公告)号：JPS5975037A
公开(公告)日：1984-04-27
申请号：JP17104683
申请日：1983-09-16
申请人： Picker Int Ltd
发明人： IIAN ROBAATO YANGU
IPC分类号： A61B5/0265 , A61B5/02 , A61B5/055 , A61B10/00 , G01F1/716 , G01N24/08 , G01R33/563
CPC分类号： G01N24/08 , G01F1/716 , G01R33/563
摘要： A method and apparatus for determining the rate and direction of flow of a liquid in a selected region of a body by NMR techniques. NMR is excited preferentially in a slice of the body which includes the region and then a magnetic field having a gradient in a direction parallel to the flow of the liquid is applied, this field being effective to cause a phase difference between the resonance for the liquid which is flowing, or has flowed, in the region and the resonance for the rest of the slice. The free induction decay signal is measured, and the phase difference between the signal from the liquid, and the signal from the rest of the slice is related to the rate of flow of the liquid through the region.

99. 发明专利

JPS5964025A Method and apparatus for deciding flow speed of fluid by nu-clear magnetic resonance technique 失效
标题翻译：用清晰磁共振技术确定流体流速的方法和装置
公开(公告)号：JPS5964025A
公开(公告)日：1984-04-11
申请号：JP14484183
申请日：1983-08-08
申请人： Picker Int Ltd
发明人： MAIKURU BAARU , IIAN ROBAATO YANGU
IPC分类号： G01P5/00 , A61B5/026 , A61B5/0265 , A61B5/055 , A61B10/00 , G01F1/716 , G01R33/563
CPC分类号： G01F1/716 , A61B5/0263 , G01R33/56308
摘要： A method and apparatus for determining the rate of flow of a liquid in a selected region of a body by nuclear magnetic resonance techniques. The method includes a sequence of applying a first magnetic pulse (B1(90 DEG )) effective to excite nuclear magnetic resonance of a chosen nucleus within the liquid preferentially in a slice of the body which includes the selected region. A period of time (tD) is waited and then a second magnetic pulse (B1(90 DEG )) is applied which is effective to excite nuclear magnetic resonance of the nuclei preferentially in the slice, and the free induction decay signal is measured. The whole sequence is repeated for different values of the period of time (tD). The values of the period of time (tD) and the corresponding measured signals are then related to the rate of flow of the liquid through the slice.

100. 实用新型

JPS5633903U 失效
公开(公告)号：JPS5633903U
公开(公告)日：1981-04-02
申请号：JP11552579
申请日：1979-08-22
IPC分类号： A61B5/0265 , A61B5/02

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