公开(公告)号：US4680549A

公开(公告)日：1987-07-14

申请号：US690303

申请日：1985-01-10

Applicant: Jukka Tanttu

Inventor： Jukka Tanttu

IPC: G01R33/20 ,  A61B5/055 ,  A61B10/00 ,  G01R33/32 ,  G01R33/34 ,  G01R33/341 ,  G01R33/36

CPC classification number: G01R33/3642 ,  G01R33/341 ,  G01R33/3628 ,  G01R33/3657

Abstract: The invention relates to a coil arrangement intended for an NMR testing apparatus for collecting NMR information about a target to be examined, said arrangement comprising first coil means (2) for exciting the nuclei of a target area and for receiving a signal emitted by the nuclei of a target area. The arrangement further includes second coil means (6) for gaining the amplitude of a signal emitted by a limited section of a target and connected to said first coil means, said gain being in proportion to the amplitude of a signal connecting from another section of a target. This is a way of improving the ratio of a signal connecting to said first coil means (2) from said limited section of a target to the electric noise created in the signal collection unit and in a target. The invention can be preferably applied to NMR imaging units which, in addition to mapping the entire body, can be used for the examination of smaller subdomains, such as the eye, ear, limbs etc.

Abstract translation: 本发明涉及一种用于NMR测试装置的线圈装置，用于收集关于待检查目标的NMR信息，所述装置包括用于激发目标区域的核并用于接收由核发射的信号的第一线圈装置（2） 的目标区域。 该装置还包括第二线圈装置（6），用于获得由目标的受限部分发射并连接到所述第一线圈装置的信号的幅度，所述增益与从另一部分连接的信号的幅度成比例 目标。 这是提高从目标的有限部分连接到所述第一线圈装置（2）的信号与在信号收集单元和目标中产生的电噪声的比率的方法。 本发明可以优选地应用于NMR成像单元，除了映射整个身体外，还可以使用它来检查较小的子域，例如眼睛，耳朵，四肢等。

公开(公告)号：US20070182410A1

公开(公告)日：2007-08-09

申请号：US10597129

申请日：2005-01-06

Applicant: Anne Niemi ,  Jukka Tanttu ,  Mika Ylihautala

Inventor： Anne Niemi ,  Jukka Tanttu ,  Mika Ylihautala

IPC: G01V3/00

CPC classification number: G01R33/5611

Abstract: In a parallel or SENSE imaging technique in an MRI system (40), a calibration scan is conducted to generate a calibration image (86) indicative of sensitivity profiles of parallel imaging coils (76a, . . . , 76n) also in the regions where the magnetic field is distorted. This is accomplished by using a phase refocusing imaging protocol such as a spin echo technique, or by using a gradient echo technique where the echo time is very short. In addition, the phase encode direction of the calibration scan and a diagnostic imaging scan shall be matched. A diagnostic imaging scan is conducted using a diagnostic scan protocol to generate a diagnostic image representation from each parallel imaging coil. A SENSE processor (90) reconstructs a final diagnostic image (92) from the diagnostic image representations and the coil sensitivity profiles.

Abstract translation: 在MRI系统（40）中的并行或SENSE成像技术中，进行校准扫描以生成指示平行成像线圈（76a，...，76n）的灵敏度分布的校准图像（86） 磁场失真的区域。 这通过使用相位重聚焦成像协议（例如自旋回波技术）或通过使用回波时间非常短的梯度回波技术来实现。 此外，校准扫描的相位编码方向和诊断成像扫描应匹配。 使用诊断扫描协议进行诊断成像扫描，以从每个并行成像线圈生成诊断图像表示。 SENSE处理器（90）从诊断图像表示和线圈灵敏度轮廓重建最终诊断图像（92）。

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。