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71. 发明授权

US4673880A Phase sensitive detection in multislice magnetic resonance imaging systems 失效
标题翻译：多层磁共振成像系统中的相敏检测
公开(公告)号：US4673880A
公开(公告)日：1987-06-16
申请号：US766617
申请日：1985-08-16
申请人： Russell A. Compton , John T. Keller , Thomas R. McBride , David M. Kramer
发明人： Russell A. Compton , John T. Keller , Thomas R. McBride , David M. Kramer
IPC分类号： G01R33/36 , A61B5/055 , A61B10/00 , G01R33/32 , G01R33/44 , G01R33/48 , G01R33/58 , G01R33/20
CPC分类号： G01R33/583
摘要： In a magnetic resonance imaging system, the same reference signal is used for both radio frequency transmission and phase sensitive detection. The use of the same reference signal for both transmission and reception prevents phase unlock between the two events. However, this technique results in variation in the demodulated, frequency encoded information, which is corrected by digitally filtering the received signal information as a function of the demodulation frequency used.
摘要翻译：在磁共振成像系统中，相同的参考信号用于射频传输和相位敏感检测。对于发送和接收都使用相同的参考信号来防止两个事件之间的相位解锁。然而，该技术导致解调的频率编码信息的变化，其通过对接收到的信号信息进行数字滤波而被校正，这是所使用的解调频率的函数。

72. 发明授权

US4649925A Ultrasonic transducer probe drive mechanism with position sensor 失效
标题翻译：超声波换能器探头驱动机构带位置传感器
公开(公告)号：US4649925A
公开(公告)日：1987-03-17
申请号：US691320
申请日：1985-01-14
申请人： Julian Dow , Paul F. Meyers
发明人： Julian Dow , Paul F. Meyers
IPC分类号： G01N29/28 , A61B8/00 , G01N29/04 , G01N29/26 , G01N29/265 , G01S7/52 , G10K11/35 , H02K33/00 , A61B10/00
CPC分类号： G01N29/265 , G01S7/52063 , G10K11/355 , G01N2291/2696
摘要： An ultrasonic transducer probe is provided, in which the transducer is oscillated by a crank shaft for sector scanning. The crank shaft is driven by a motor having a moving magnet stack assembly in a tubular set of electromagnetic coils. The motor also moves a bimetallic pin through a position sensor coil so that the position of the transducer is represented by the detected inductance change of the coil.
摘要翻译：提供了一种超声换能器探头，其中换能器由用于扇形扫描的曲轴振荡。曲柄轴由电动机驱动，该马达具有一组电磁线圈的管状组件。电动机还将双金属销移动通过位置传感器线圈，使得换能器的位置由检测到的线圈的电感变化表示。

73. 发明授权

US4649348A Radio frequency coils for nuclear magnetic resonance imaging systems 失效
标题翻译：射频线圈用于核磁共振成像系统
公开(公告)号：US4649348A
公开(公告)日：1987-03-10
申请号：US642613
申请日：1984-08-20
申请人： David C. Flugan
发明人： David C. Flugan
IPC分类号： G01R33/34 , G01R33/20
CPC分类号： G01R33/34069 , G01R33/3657 , Y10S505/844
摘要： A family of high Q radio frequency coils for an NMR imaging system is provided. The coil family includes a transmitting coil for transmitting an r.f. field aligned with a given plane. The transmitting coil is used with one of the described receiving coils, each of which is responsive to NMR signals in a plane oriented orthogonally to said given plane. The receiving coils employ an open, arcuate configuration, which alleviates sensations of confinement characteristic of fully enclosing coil forms. Arcuate sections of the receiving coils are curved away from the patient, to decrease signal reception at areas from which meaningful signals cannot be gathered. To prevent interaction between the transmitting and receiving coils, means are provided for rendering each coil nonresponsive to NMR and radio signal frequencies when the coils are not being operated.
摘要翻译：提供了一个用于NMR成像系统的高Q射频线圈系列。线圈系列包括用于传输r.f的发射线圈。场与给定平面对齐。发射线圈与所述接收线圈中的一个一起使用，每个接收线圈在与所述给定平面正交定向的平面中响应于NMR信号。接收线圈采用开放的弓形结构，其减轻完全包围线圈形式的限制特性的感觉。接收线圈的弧形部分从患者身体弯曲，以减少无法收集有意义的信号的区域的信号接收。为了防止发送和接收线圈之间的相互作用，提供了当线圈未被操作时使每个线圈不响应于NMR和无线电信号频率的装置。

74. 发明授权

US4636728A Offset gradient fields in nuclear magnetic resonance imaging systems 失效
标题翻译：核磁共振成像系统中的偏移梯度场
公开(公告)号：US4636728A
公开(公告)日：1987-01-13
申请号：US621396
申请日：1984-06-18
申请人： Russell A. Compton , Waldo S. Hinshaw , David M. Kramer
发明人： Russell A. Compton , Waldo S. Hinshaw , David M. Kramer
IPC分类号： G01R33/38 , G01R33/385 , G01R33/20
CPC分类号： G01R33/385 , G01R33/381
摘要： The null point in the gradient field of an NMR imaging system is offset from its nominal position in the static magnetic field by application of a bias field to the gradient field. The bias field produces a substantially uniform offset in the field intensity at every point in the gradient field. Alternatively, null point offset may be achieved by controllably superimposing two gradient fields of separately located null points.
摘要翻译： NMR成像系统的梯度场中的零点通过向梯度场施加偏置场而偏离静态磁场中的标称位置。偏置场在梯度场中的每个点处的场强度中产生基本均匀的偏移。或者，可以通过可控地叠加分开定位的零点的两个梯度场来实现零点偏移。

75. 发明授权

US4625324A High vacuum rotating anode x-ray tube 失效
标题翻译：高真空旋转阳极x射线管
公开(公告)号：US4625324A
公开(公告)日：1986-11-25
申请号：US579068
申请日：1984-02-10
申请人： Edward A. Blaskis , Roland W. Carlson
发明人： Edward A. Blaskis , Roland W. Carlson
IPC分类号： H01J35/10 , H01J35/16
CPC分类号： H01J35/106 , H01J35/16
摘要： An all metal and ceramic high vacuum rotary anode x-ray tube adapted for mounting on a gantry of a rotational type CT scanner. The evacuated region where x-rays are generated is maintained at about 10.sup.-7 Torr. Vacuum sealing about the rotating shaft of the anode is provided by a magnetic fluid. No bearings are utilized within the evacuated region. Large, long wearing ball bearings that transmit rotation through the vacuum seal are provided about the shaft outside of the high vacuum region where conventional lubricants may be applied. Circulating coolant is applied internally through the anode assuring continual operation of the tube without the need for frequent cool-down waits. A preferred embodiment discloses a modified path in the rotor for the coolant designed to disturb the conventional laminar type of flow which is heat transfer inefficient to one characterized by high turbulence resulting in approximately an order of magnitude improvement in the coefficient of heat transfer.
摘要翻译：全金属和陶瓷高真空旋转阳极x射线管适用于安装在旋转式CT扫描仪的机架上。产生X射线的抽空区域保持在约10-7乇。围绕阳极的旋转轴的真空密封由磁性流体提供。在抽空区域内没有使用轴承。通过真空密封件传递旋转的大型长磨损球轴承设置在可以施加常规润滑剂的高真空区域外侧的轴上。循环冷却液通过阳极内部施加，确保管的连续操作，而不需要频繁的冷却等待。优选实施例公开了用于冷却剂的转子中的改进路径，其被设计成干扰传统的层流型流动，其传热效率低于以高湍流为特征的特征，导致传热系数提高大约一个数量级。

76. 发明授权

US4620313A Controlled cutoff frequency analog filter for CT scanners 失效
标题翻译：用于CT扫描仪的截止频率模拟滤波器
公开(公告)号：US4620313A
公开(公告)日：1986-10-28
申请号：US622522
申请日：1984-06-20
申请人： Joseph W. Erker
发明人： Joseph W. Erker
IPC分类号： G01N23/04 , A61B6/03 , G03B41/16
CPC分类号： A61B6/032 , Y10S378/901
摘要： A network for use in a fourth generation CT scanner for noise reduction. The network comprises an active low pass filter whose cutoff frequency is controlled by a scaled signal responsive to the angular velocity of the rotating radiation source of the scanner. In a preferred embodiment a raw signal is generated by an encoder that detects movement of the source. As the source speed changes either in response to an operator's selection of a different scan speed or to systemic variations in the scanner relative to expected performance, the filter's cutoff frequency will automatically change thereby assuring optimum performance regardless of scan speed.
摘要翻译：用于第四代CT扫描仪用于降噪的网络。网络包括有源低通滤波器，其截止频率由响应于扫描器的旋转辐射源的角速度的缩放信号控制。在优选实施例中，原始信号由检测源的移动的编码器产生。随着源速度响应于操作者对不同扫描速度的选择或扫描仪相对于预期性能的系统变化而变化，滤波器的截止频率将自动改变，从而确保最佳性能而不管扫描速度如何。

77. 发明授权

US4595879A Nuclear magnetic resonance flow imaging 失效
标题翻译：核磁共振流动成像
公开(公告)号：US4595879A
公开(公告)日：1986-06-17
申请号：US551244
申请日：1983-11-14
申请人： Arnold H. Lent , Waldo S. Hinshaw , Russell A. Compton
发明人： Arnold H. Lent , Waldo S. Hinshaw , Russell A. Compton
IPC分类号： G01F1/56 , G01R33/563 , G01R33/24
CPC分类号： G01F1/56 , G01R33/563
摘要： The effects of particle motion or flow within a sample may be measured by applying a motion-encoding gradient to the sample, along with spatial encoding gradients. The motion-encoding gradient applies two gradient fields of respective opposite sense to the spins of the sample so as to encode motion as a net phase component resulting from the two fields. Two image data sequences, one with motion encoding and one without, may be compared to measure the effects of motion, or a plurality of image data sequences may be taken, each with a different value motion-encoding gradient. A Fourier transformation performed on the sequence data in the latter case with respect to the variation in the motion-encoding gradient pulses will yield a plurality of images, each representing the amount of material which exhibits a different velocity.
摘要翻译：颗粒运动或样品内流动的影响可以通过对样品应用运动编码梯度以及空间编码梯度来测量。运动编码梯度对样本的自旋施加相应相反意义的两个梯度场，以便将运动编码为由两个场产生的净相位分量。可以比较具有运动编码和不具有运动编码的两个图像数据序列，以测量运动的效果，或者可以采用多个图像数据序列，每个图像数据序列具有不同的值运动编码梯度。对于后一种情况下针对运动编码梯度脉冲的变化执行的序列数据的傅立叶变换将产生多个图像，每个图像表示呈现不同速度的材料的量。

78. 发明授权

US4533947A Adaptable area for image storage 失效
标题翻译：适用于图像存储的区域
公开(公告)号：US4533947A
公开(公告)日：1985-08-06
申请号：US550835
申请日：1983-11-14
申请人： Kendall A. Smith
发明人： Kendall A. Smith
IPC分类号： H04N7/18 , A61B6/00 , H04N5/91 , H05G1/60 , H05G1/64 , A61B6/02
CPC分类号： H05G1/60 , H05G1/64 , Y10S378/901
摘要： Method and apparatus for increasing the effective data storage transfer rate in a system to permit the recording of a rapid sequence of high resolution images by eliminating and hence not transferring designated portions of each image in the sequence.
摘要翻译：一种用于增加系统中的有效数据存储传送速率以允许通过消除并因此不按顺序传送每个图像的指定部分来记录快速序列的高分辨率图像的方法和装置。

79. 发明授权

US4503331A Non-circular emission computed tomography 失效
标题翻译：非圆形发射计算机断层扫描
公开(公告)号：US4503331A
公开(公告)日：1985-03-05
申请号：US370425
申请日：1982-04-21
申请人： Richard M. Kovacs, Jr. , Eugene J. Senger , Robert H. Wake
发明人： Richard M. Kovacs, Jr. , Eugene J. Senger , Robert H. Wake
IPC分类号： G01N23/04 , A61B6/02 , A61B6/03 , G01T1/164 , G01T1/166 , G01T1/29 , G01T1/20
CPC分类号： G01T1/1648 , A61B6/037 , G01T1/2985
摘要： A radiation imaging system including a rotatable scintillation detector for non-circular emission computed tomography. The radiation imaging system includes a rotatable scintillation detector and a linearly movable detector stand. With the stand stationary, the scintillation detector is capable of circularly orbiting about the longitudinal axis of the patient for emission computed tomography and with the detector stationary the detector stand may be linearly displaced for whole body scanning with the patient aligned parallel to the detector stand path in an orientation orthogonal to the tomographic orientation. The circular rotational motion is combined with the linear translation such that the detector orbits about a section of the patient in a non-circular path. The path assures a minimum distance between the face of the scintillation detector and the boundary of the patient during the entire tomographic orbit to thereby improve resolution of the tomogram.
摘要翻译：一种辐射成像系统，包括用于非圆形发射计算机断层摄影的可旋转闪烁检测器。放射线成像系统包括可旋转闪烁检测器和线性可移动检测器支架。在立体静止的情况下，闪烁检测器能够围绕患者的纵向轴线循环发射计算机断层摄影，并且随着检测器静止，检测器支架可以线性位移，以使患者平行于检测器支架路径对准整个身体扫描在与断层摄影取向正交的方向上。圆形旋转运动与线性平移组合，使得检测器围绕患者的一部分以非圆形路径运动。所述路径确保在整个断层摄影轨道期间闪烁检测器的面部与患者的边界之间的最小距离，从而提高断层图像的分辨率。

80. 发明授权

US4492119A Articulated arm ultrasound imaging systems 失效
标题翻译：铰接臂超声成像系统
公开(公告)号：US4492119A
公开(公告)日：1985-01-08
申请号：US463426
申请日：1983-02-03
申请人： Mark J. Dulapa , William M. Glenn, Jr.
发明人： Mark J. Dulapa , William M. Glenn, Jr.
IPC分类号： G01N29/06 , G01N29/265 , G01S7/52 , G10K11/35 , G01N29/04
CPC分类号： G10K11/35 , G01N29/0609 , G01N29/0645 , G01N29/265 , G01S7/52017 , G01S7/5206
摘要： An ultrasound imaging system is provided having an articulated arm for holding a transducer. Signals representative of the angular position of the arm joints are scaled up to a voltage range over which the restricted range of movement of each joint is distributed. The scaled signals are combined to produce a plurality of combined angular signals, which then may be digitized and used to compute the X-Y position of the transducer.
摘要翻译：提供具有用于保持换能器的铰接臂的超声成像系统。代表臂关节的角位置的信号被放大到每个关节的限制运动范围分布的电压范围。经缩放的信号被组合以产生多个组合的角度信号，其然后可被数字化并用于计算换能器的X-Y位置。

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