公开(公告)号：US08388545B2

公开(公告)日：2013-03-05

申请号：US11884227

申请日：2006-01-18

申请人： Hanan Keren ,  Avram B. Simon

发明人： Hanan Keren ,  Avram B. Simon

IPC分类号： A61B5/02

CPC分类号： A61B5/0535 ,  A61B5/026 ,  A61B5/0295 ,  A61B5/7239

摘要： A method of calculating blood flow in an organ of a subject using output radiofrequency signals transmitted to the organ and input radiofrequency signals received from the organ, the method comprises determining a phase shift of the input radiofrequency signals relative to the output radiofrequency signals and using the phase shift to calculate the blood flow in the organ.

摘要翻译： 一种使用发送到器官的输出射频信号计算被检者的器官中的血流量并输入从器官接收的射频信号的方法，所述方法包括：确定输入射频信号相对于输出射频信号的相移，并使用 相移计算器官中的血流量。

公开(公告)号：US20100217140A1

公开(公告)日：2010-08-26

申请号：US12596483

申请日：2008-04-15

申请人： Yoav Avidor ,  Hanan Keren

发明人： Yoav Avidor ,  Hanan Keren

IPC分类号： A61B5/0402

CPC分类号： A61B5/0535 ,  A61B5/0245 ,  A61B5/029

摘要： A method of predicting onset of electromechanical dissociation in a heart of a subject is disclosed. The method comprises: extracting from the composite input signal an electrocardiac signal and determining electrical activity of the heart based on the electrocardiac signal; extracting from the composite input signal a radiofrequency signal and determining blood flow measure based on the radiofrequency signal; and if the blood flow measure is below a predetermined threshold and the electrical activity is above a predetermined threshold, then predicting the onset of electromechanical dissociation.

摘要翻译： 公开了一种预测受试者心脏中机电解离发病的方法。 该方法包括：从复合输入信号中提取心电信号，并根据心电信号确定心脏的电活动; 从所述复合输入信号中提取射频信号，并基于所述射频信号确定血流量度量; 并且如果血液流量测量值低于预定阈值并且电活动高于预定阈值，则预测机电解离的开始。

公开(公告)号：US20100191127A1

公开(公告)日：2010-07-29

申请号：US12527697

申请日：2008-02-21

申请人： Hanan Keren ,  Daniel Burkhoff ,  Yoav Avidor ,  Pierre Squara

发明人： Hanan Keren ,  Daniel Burkhoff ,  Yoav Avidor ,  Pierre Squara

IPC分类号： A61B5/0205

CPC分类号： A61B5/0535 ,  A61B5/02028 ,  A61B5/0205 ,  A61B5/029 ,  A61B5/0537 ,  A61B5/4869

摘要： A method of estimating exercise capacity of a subject is disclosed. The method uses output radiofrequency signals transmitted to the subject during exercise and input radiofrequency signals received from the subject during exercise. The method comprises: determining a phase shift of the input radiofrequency signals relative to the output radiofrequency signals; calculating cardiac output based on the phase shift; and using the cardiac output for estimating the exercise capacity of the subject.

摘要翻译： 公开了一种估计受试者运动能力的方法。 该方法使用在运动期间发送到被摄体的输出射频信号，并且在运动期间输入从对象接收的射频信号。 该方法包括：确定输入射频信号相对于输出射频信号的相移; 基于相移计算心输出量; 以及使用心输出量来估计受试者的运动能力。

公开(公告)号：US4928064A

公开(公告)日：1990-05-22

申请号：US321299

申请日：1989-03-10

申请人： Hanan Keren

发明人： Hanan Keren

IPC分类号： G01R33/341

CPC分类号： G01R33/3678 ,  G01R33/341

摘要： A surface coil for use in MRI data acquisition systems wherein the surface coil has the capability of operating as a quadrature coil and of supporting two independent current moles enabling tuning to two separate frequencies.

摘要翻译： 一种用于MRI数据采集系统的表面线圈，其中表面线圈具有作为正交线圈操作的能力，并支持两个独立的电流摩尔，使得能够调谐到两个分开的频率。

公开(公告)号：US4901022A

公开(公告)日：1990-02-13

申请号：US374552

申请日：1989-07-05

申请人： Hanan Keren ,  Itzchak Linenberg

发明人： Hanan Keren ,  Itzchak Linenberg

IPC分类号： G01R33/36

CPC分类号： G01R33/3628

摘要： A broadband matching and decoupling network for matching RF coils to an MR system at more than one Larmor frequency using coaxial cable that is equal to 1/4.lambda. at the lower Larmor frequency and an odd multiple of 1/4.lambda. at the higher Larmor frequency.

摘要翻译： 宽带匹配和去耦网络，用于使用同轴电缆将RF线圈与MR系统匹配，该同轴电缆在较低的拉莫尔频率处等于1/4λ，在较高拉莫尔频率处的1/4λ的奇数倍 。

公开(公告)号：US08790267B2

公开(公告)日：2014-07-29

申请号：US12673037

申请日：2008-08-11

申请人： Hanan Keren ,  Yoav Avidor ,  Pierre Squara ,  Daniel Burkhoff ,  Baruch Levy

发明人： Hanan Keren ,  Yoav Avidor ,  Pierre Squara ,  Daniel Burkhoff ,  Baruch Levy

IPC分类号： A61B5/02 ,  A61B5/026 ,  A61B5/029

CPC分类号： A61B5/02028 ,  A61B5/029 ,  A61B5/053 ,  A61B5/0535 ,  A61B5/0537 ,  A61B5/4869 ,  A61B5/7239 ,  A61B5/725 ,  A61B5/742

摘要： A method of processing a signal pertaining to at least one electrical property of an organ of a subject is disclosed. The method comprises determining a physiological condition of the subject, selecting a frequency band, filtering the signal according to the frequency band, and dynamically adapting the frequency band in response to a change in the physiological condition.

摘要翻译： 公开了处理与被检体的器官的至少一个电气特性有关的信号的方法。 该方法包括确定对象的生理状况，选择频带，根据频带对信号进行滤波，以及响应于生理状态的变化来动态调整频带。

公开(公告)号：US06608590B1

公开(公告)日：2003-08-19

申请号：US10086421

申请日：2002-03-04

申请人： Guy Naym ,  Hanan Keren

发明人： Guy Naym ,  Hanan Keren

IPC分类号： H01Q300

CPC分类号： H01Q1/1257

摘要： A method for aligning an antenna polarization axes of a dual polarized end-user terminal having an antenna. The antenna is aligned with a satellite in relation to azimuth and elevation. The end-user terminal is configured in an alignment mode to produce a first output corresponding to a first component of a received signal parallel to a first polarization axis of the antenna and a second output corresponding to a second component of the received signal parallel to a second polarization axis of the antenna. The first polarization axis is orthogonal to the second polarization axis. The method includes the steps of: receiving a linearly polarized signal; autocorrelating the first output and the second output to produce a measurement of autocorrelation; and adjusting the antenna polarization axes to minimize the measurement of autocorrelation.

摘要翻译： 一种用于对准具有天线的双极化终端用户终端的天线偏振轴的方法。 天线与方位角和高程相关的卫星对准。 最终用户终端被配置为对准模式，以产生对应于平行于天线的第一偏振轴的接收信号的第一分量的第一输出和对应于平行于天线的接收信号的第二分量的第二输出 天线的第二偏振轴。 第一偏振轴与第二偏振轴正交。 该方法包括以下步骤：接收线偏振信号; 自相关第一输出和第二输出以产生自相关的测量; 并调整天线偏振轴以最小化自相关的测量。

公开(公告)号：US06574500B2

公开(公告)日：2003-06-03

申请号：US09946168

申请日：2001-09-05

申请人： Hanan Keren

发明人： Hanan Keren

IPC分类号： A61B600

CPC分类号： A61B6/481 ,  A61B6/504

摘要： A method and apparatus for imaging a body by exposing the body to radiation transmitted through the body via successive angular portions from a radiation source on one side of the body to a radiation detector in alignment with the radiation source on the opposite side of the body; the radiation detector including a two-dimensional matrix of detector elements producing electrical outputs corresponding to the magnitudes of the radiation received by each detector element; the radiation source producing a conical beam sufficiently large such that each exposure covers all the detector elements in the two-dimensional array after traversing the body. Also described are a method and apparatus for producing angiographical images having an enhanced contrast-to-noise ratio (CNR) by subtracting, from each contrast image produced after injecting a contrast material, a masking image produced before injecting the contrast material, starting with the masking image determined to have a minimum change over its immediately preceding masking image in the respective sequence.

摘要翻译： 一种用于对身体成像的方法和装置，所述方法和装置通过经身体的一侧上的辐射源经由连续角度部分暴露于穿过身体的辐射而辐射至与身体相反侧上的辐射源对准的辐射检测器; 所述辐射检测器包括检测器元件的二维矩阵，其产生对应于由每个检测器元件接收的辐射的幅度的电输出; 辐射源产生足够大的锥形束，使得每次曝光覆盖穿过身体后的二维阵列中的所有检测器元件。 还描述了一种用于通过从注射造影剂材料之后产生的每个对比图像中减去在注射造影剂之前产生的掩蔽图像，从而从具有增强的对比度（CNR）的方式生成具有增强的对比度（CNR）的血管造影图像的方法和装置， 被确定为在其相应序列中其紧接在前的掩蔽图像具有最小变化的掩蔽图像。

公开(公告)号：US5160891A

公开(公告)日：1992-11-03

申请号：US609779

申请日：1990-11-07

申请人： Hanan Keren

发明人： Hanan Keren

IPC分类号： G01R33/341 ,  G01R33/3415

CPC分类号： G01R33/3678 ,  G01R33/3415

摘要： Receiver circuitry for a surface coil array used in magnetic resonance diagnostic systems, said circuitry minimizes reflections and thus relaxes the prior art necessity for balancing the individual receiver channel for each array by obtaining quadrature signals from the acquired signals in processing circuitry located as close as possible process-wise to the display equipment.

摘要翻译： 用于磁共振诊断系统中的表面线圈阵列的接收器电路，所述电路使反射最小化，并因此松弛了现有技术的必要性，以通过从处理电路中获取的信号获得正交信号，该信号位于尽可能靠近的位置 过程到显示设备。

公开(公告)号：US5055792A

公开(公告)日：1991-10-08

申请号：US462469

申请日：1990-01-09

申请人： Hanan Keren

发明人： Hanan Keren

IPC分类号： G01R33/341 ,  G01R33/36

CPC分类号： G01R33/341 ,  G01R33/3628

摘要： A miniaturized surface probe for use with magnetic resonance (MR) systems. The probe comprises a conductor loop for use juxtaposed to a patient. A tuning and matching section connects the probe to the receiver. The section tunes the loop to the desired Larmor frequency and matches the loop to the MR system. A N.lambda./2 length of shielded cable is used to couple the loop to the spatially removed tuning and matching section.

摘要翻译： 用于磁共振（MR）系统的小型化表面探针。 探针包括与病人并列使用的导体回路。 调谐和匹配部分将探头连接到接收器。 该部分将循环调谐到所需的拉莫尔频率，并将循环与MR系统相匹配。 Nλ/ 2长度的屏蔽电缆用于将环路耦合到空间移除的调谐和匹配部分。