公开(公告)号：US5262724A

公开(公告)日：1993-11-16

申请号：US949345

申请日：1992-09-22

Applicant: Jukka Tanttu

Inventor： Jukka Tanttu

IPC: G01R33/48 ,  G01R33/563 ,  G01V3/00

CPC classification number: G01R33/5635 ,  G01R33/4828 ,  G01R33/5602 ,  G01R33/563 ,  G01R33/56341

Abstract: The invention relates to a method for the examination of an object, such as a human body, an animal or the trunk of a tree, on the basis of NMR phenomenon and magnetic resonance imaging techniques, said method including a preparatory section and a signal pick-up section. Said preparatory section comprises the actions for producing a spin inversion and the actions for off-resonance radiation.

Abstract translation: 本发明涉及一种用于根据NMR现象和磁共振成像技术检查诸如人体，动物或树干的物体的方法，所述方法包括预备部分和信号拾取器 -up部分。 所述预备部分包括用于产生自旋反转的动作和用于非共振辐射的动作。

公开(公告)号：US5211166A

公开(公告)日：1993-05-18

申请号：US773254

申请日：1991-10-09

Applicant: Raimo Sepponen

Inventor： Raimo Sepponen

IPC: A61B17/00 ,  A61B5/055 ,  A61B90/00 ,  A61M36/12 ,  A61N5/10 ,  G01N1/28 ,  G01R33/28 ,  G01R33/62

CPC classification number: G01R33/62 ,  A61B90/39 ,  G01N1/28 ,  G01R33/28 ,  A61B2090/392 ,  A61B2090/3954 ,  A61N5/1027

Abstract: An operative instrument for the examination of an object, for example a biopsy tube or a capsule of a radioactive substance intended for radiation therapy. A part of the operative instrument, the active part, is adapted to be detected by NMR methods, such as magnetic resonance imaging, either in a manner that the active part contains a substance having NMR active nuclei or in a manner that the NMR active nuclei in proximity of the active part of the object can emit NMR signals in connection with an NMR or magnetic resonance imaging examination arrangement. A substance, a relaxant, is arranged in interaction with said NMR active nuclei, said relaxant causing activation of the NMR signal by means of dynamic nuclear polarization (DNP) when the electron spin system of said substances is saturated with external energy, i.e. saturation energy.

Abstract translation: 用于检查物体的手术器械，例如用于放射治疗的放射性物质的活检管或胶囊。 手术器械的一部分，活性部分适于通过NMR方法检测，例如磁共振成像，以使活性部分含有具有NMR活性核的物质，或以使NMR活性核 在物体的活性部分附近可以发射与NMR或磁共振成像检查装置相关的NMR信号。 一种物质，一种松弛剂被布置成与所述NMR活性核相互作用，当所述物质的电子自旋系统被外部能量饱和时，所述松弛剂通过动态核极化（DNP）激活NMR信号，即饱和能 。

公开(公告)号：US5161406A

公开(公告)日：1992-11-10

申请号：US652658

申请日：1991-02-06

Applicant: Erkki Heinonen

Inventor： Erkki Heinonen

IPC: A61M16/10 ,  G01M3/26 ,  G01N9/36 ,  G01N11/08

CPC classification number: A61M16/104 ,  G01M3/26 ,  G01N11/08 ,  G01N9/36

Abstract: The invention relates to a method and an apparatus for the identification of a gas flow or its disturbances. A gas flowing in a gas pipe is allowed to pass through at least two flow-restricting elements in series, the pressure differences of a flowing gas being measured over said elements and effecting the identification by means of such measured pressure differences.

Abstract translation: 本发明涉及一种用于识别气流或其扰动的方法和装置。 允许在气体管道中流动的气体通过至少两个串联的流动限制元件，流过的气体的压力差在所述元件上被测量，并通过这种测量的压力差进行识别。

公开(公告)号：US5159270A

公开(公告)日：1992-10-27

申请号：US574445

申请日：1990-08-28

Applicant: Raimo Sepponen

Inventor： Raimo Sepponen

IPC: A61B5/055 ,  G01R33/48 ,  G01R33/483

CPC classification number: G01R33/446 ,  G01R33/4833

Abstract: The invention relates to an imaging method for the examination of an object such as a human body, an animal or a tree trunk, based on the NMR phenomenon and magnetic resonance imaging techniques. The amplitude of excitation pulses used for producing an NMR signal is selected in a manner that a so-called excitation angle is smaller than 90.degree. and the object of these excitation pulses is subjected to electromagnetic irradiation at a frequency which is different from the resonance frequency of an NMR signal recording on the magnetic image of said object.

Abstract translation: 本发明涉及一种用于根据NMR现象和磁共振成像技术检查诸如人体，动物或树干的物体的成像方法。 用于产生NMR信号的激励脉冲的振幅以所谓的激发角小于90°的方式选择，并且这些激发脉冲的目的以不同于谐振频率的频率进行电磁辐射 在所述物体的磁性图像上记录NMR信号。

公开(公告)号：US4769604A

公开(公告)日：1988-09-06

申请号：US38475

申请日：1987-04-14

Applicant: Raimo Sepponen

Inventor： Raimo Sepponen

IPC: A61B10/00 ,  A61B5/055 ,  G01R33/48 ,  G01R33/54 ,  G01R33/20

CPC classification number: G01R33/482

Abstract: A method of mapping the local distribution of the coupling constant J and for the application of this method, as for example, for examining the dynamic properties of an object. The object is excited with a first (90.degree.) excitation pulse. A magnetic field gradient is applied to the object and after a first time delay, the object is subjected to a second (180.degree.) excitation pulse. A magnetic field gradient is reapplied and after a second time delay, the spin echo signal is obtained. The sequence is repeated by changing the first and second delay times and changing the time integrals of the magnetic field gradients in accordance with the selected NMR imaging method. The second excitation pulse is preferably maintained at the midway point of the time between the first excitation pulse and the spin echo. The method may be used to analyze metabolic or physiological properties by using tracers with nuclei having coupling constants differing from the nuclei normally present in the object.

Abstract translation: 映射耦合常数J的局部分布的方法以及该方法的应用，例如用于检查对象的动态属性。 物体用第一（90°）激发脉冲激发。 对物体施加磁场梯度，并且在第一时间延迟之后，物体经受第二（180°）激励脉冲。 重新施加磁场梯度，并且在第二时间延迟之后，获得自旋回波信号。 通过根据所选择的NMR成像方法改变第一和第二延迟时间并改变磁场梯度的时间积分来重复该顺序。 第二激励脉冲优选地保持在第一激发脉冲和自旋回波之间的时间的中间点。 该方法可用于通过使用具有与通常存在于物体中的核的耦合常数不同的核的示踪剂来分析代谢或生理学性质。

公开(公告)号：US4743850A

公开(公告)日：1988-05-10

申请号：US97253

申请日：1987-09-17

Applicant: Raimo Sepponen

Inventor： Raimo Sepponen

IPC: A61B10/00 ,  A61B5/055 ,  G01R33/48 ,  G01R33/54 ,  G01R33/20

CPC classification number: G01R33/482

Abstract: A method for determining the spatial distribution of an NMR responsive element in a selected volume of an object to be examined and the relaxation time in the rotating frame (Tl .rho.) of nuclei of the element. An external magnetic field is applied to the selected volume of the object. The nuclei in the selected volume are excited by a first electromagnetic pulse for generating a nuclear magnetization transverse to the direction of the main magnetic field. A second electromagnetic pulse is applied to the selected volume. The second pulse is oscillatory and has a phase selected such that the magnetic component of the pulse is directed parallel to the direction of the processing transverse nuclear magnetization. The relaxation obtained during this second pulse occurs in a rotating reference frame and is characterized by the relaxation time Tl .rho.. Magnetic field gradient pulses sequenced with said electromagnetic pulses are applied and the NMR signals collected to construct a map containing relaxation tiem in the rotating frame (Tl .rho.) data.

Abstract translation: 一种用于确定待检测物体的选定体积中的NMR响应元件的空间分布的方法以及元件的核的旋转框架（Tl rho）中的弛豫时间。 将外部磁场施加到所选择的物体的体积上。 所选择的体积中的核被第一电磁脉冲激发，以产生横向于主磁场方向的核磁化。 将第二电磁脉冲施加到所选择的体积。 第二脉冲是振荡的并且具有相位选择，使得脉冲的磁分量平行于处理横向核磁化的方向。 在该第二脉冲期间获得的松弛发生在旋转参考系中，其特征在于弛豫时间T1ho。 施加用所述电磁脉冲排序的磁场梯度脉冲，并收集NMR信号以构成在旋转帧（Tl rho）数据中包含弛豫tiem的图。

公开(公告)号：US4668904A

公开(公告)日：1987-05-26

申请号：US601952

申请日：1984-04-19

Applicant: Juhani Kupiainen

Inventor： Juhani Kupiainen

IPC: A61B10/00 ,  A61B5/055 ,  G01R33/381 ,  G01R33/385 ,  H02J15/00 ,  H02M9/00 ,  H03K3/57 ,  H03K17/687 ,  G05F1/00

CPC classification number: H03K3/57 ,  G01R33/3852 ,  H03K17/6871

Abstract: The invention relates to a controlled source of current (1) having an inductive load (3), particularly a gradient coil adaptable to a nuclear spin imaging assembly. In order to cut down the reversal time of a current flowing in the load, the circuit is provided, according to the invention, with controlled energy storage instruments (2) connected in series with source of current (1) and inductive load (3) for increasing the rate of conversion of energy stored in said inductive load (3). Said instruments (2) preferably comprise capacitor means (C1, C2) and switch means (F1 . . . F4) for controlling the capacitors, facilitating a quick transfer of energy into or out of load (3). Said switch means (F1 . . . F4) are controlled by means of instruments (6) sensing a current flowing in inductive load (3), the conversion of energy being thus accurately controlled.

Abstract translation: 本发明涉及具有感性负载（3）的电流（1）的受控源，特别是适用于核旋转成像组件的梯度线圈。 为了减少在负载中流动的电流的反转时间，根据本发明，提供了与电流源（1）和电感负载（3）串联连接的受控储能装置（2） 用于增加存储在所述感性负载（3）中的能量的转换速率。 所述仪器（2）优选地包括用于控制电容器的电容器装置（C1，C2）和开关装置（F1 ... F4），从而有助于将能量快速传输到负载（3）中。 所述开关装置（F1 ... F4）通过感应在感性负载（3）中流动的电流的仪器（6）进行控制，从而精确控制能量的转换。

公开(公告)号：US4641336A

公开(公告)日：1987-02-03

申请号：US568887

申请日：1984-01-06

Applicant: Jan Gastrin

Inventor： Jan Gastrin

IPC: G21K3/00 ,  A61B6/00 ,  A61B6/06 ,  A61B6/14 ,  G01N23/04 ,  G21K1/10

CPC classification number: A61B6/501 ,  A61B6/06 ,  G21K1/10

Abstract: The invention relates to a soft tissue filter arrangement in X-ray imaging of a patient's skull by means of a chefalostat, wherein a patient (P) is by means of ear plugs (5) or the like supports preferably fixed relative to imaging coordinates as well as by means of a nasion and/or forehead support (6) set in a determined position and location between an X-ray source (1) and a film (4) or the like imaging medium and wherein the X-ray source is provided with diaphragm (2) for directing X-rays to the patient and restricting them to a proper sized beam (3) for imaging. The arrangement comprises preferably V-shaped filter means (7) whose position relative to the soft tissues of a patient's face in a cross-sectional plane perpendicular to the X-ray beam is adapted to be set on the basis of a distance (D) between said ear plugs (5) or the like supports and said nasion and/or forehead support (6) or on the basis of a patient's skull dimension correlating sufficiently well therewith. The nasion and/or forehead support (6 ) can be preferably provided with control elements and a scale by means of which the control elements (8) of said filter means (7) can be adapted to be controlled for producing an image having optimum patientwise exposure.

Abstract translation: 本发明涉及一种通过厨师用户对患者头骨的X射线成像的软组织过滤器装置，其中患者（P）借助于耳塞（5）或类似物支撑，优选地相对于成像坐标固定为 以及通过设置在X射线源（1）和膜（4）等成像介质之间的确定位置和位置处的伤口和/或前额支撑件（6），并且其中X射线源 设置有用于将X射线引导到患者并将其限制到适当尺寸的束（3）用于成像的隔膜（2）。 该装置优选地包括V形过滤器装置（7），其相对于垂直于X射线束的横截面中的患者面部的软组织的位置适于基于距离（D）设定， 在所述耳塞（5）或类似支撑件之间，以及所述插入和/或前额支撑件（6）之间，或者基于与其充分相关的患者颅骨尺寸。 可以优选地，所述内侧和/或前额支撑件（6）设置有控制元件和标尺，借助于该尺寸，所述过滤器装置（7）的控制元件（8）能够被控制以产生具有最佳患者方式 曝光。

公开(公告)号：US4589122A

公开(公告)日：1986-05-13

申请号：US652526

申请日：1984-09-20

Applicant: Timo Nieminen

Inventor： Timo Nieminen

IPC: A61B6/14

CPC classification number: A61B6/14

Abstract: The invention relates to a panoramic tomography X-ray apparatus, particularly a so-called narrow beam tomographic apparatus for imaging the teeth and jaw area of a patient, wherein an X-ray source (14) and imaging means, e.g. a film cassette (6), are by means of an arm member (13) or the like connected to each other on opposite sides of a target to be imaged and adapted for the actual imaging to be rotated around said target to be imaged. For establishing a constant magnification or enlargement and reducing a radiation dosage the apparatus comprises means for moving said imaging means during the imaging in the direction parallel to a beam of X-rays (15) in a manner that the distance of said imaging means from a selected layer to be imaged remains substantially unchanged. In practice, this is achieved by employing a guide profile (2), from which said imaging means are kept during the imaging at a constant distance by means of a motion in the direction of said beam of X-rays (15).

Abstract translation: 本发明涉及一种全景断层摄影X射线设备，特别是一种用于对患者的牙齿和颌部区域进行成像的所谓的窄光束断层摄影装置，其中X射线源（14）和成像装置，例如， 胶片盒（6）通过在待成像的对象物的相对侧上相互连接的臂部件（13）或类似物，并适于使实际成像围绕所要成像的目标进行旋转。 为了建立恒定的放大或放大并减少辐射剂量，该装置包括用于在成像期间以与X射线束（15）平行的方向移动所述成像装置的装置，使得所述成像装置距离 所选择的待成像层保持基本不变。 实际上，这是通过采用引导轮廓（2）来实现的，通过在所述X射线束（15）的方向上的运动，所述成像装置在成像期间以恒定距离保持。