公开(公告)号：EP0213858A3

公开(公告)日：1988-03-02

申请号：EP86306319

申请日：1986-08-15

Applicant: TECHNICARE CORPORATION

Inventor： Kramer, David Moses ,  Compton, Russell Allen ,  Yeung, Hong-Ning

IPC: G01N24/08

CPC classification number: G01R33/4835 ,  G01R33/4828

Abstract: In a magnetic resonance imaging system, a multiplexing technique is used to image volumetric regions by performing a number of scans within the recovery time of the spin systems. The multiple scans acquire signal information from sub-regional volumes by phase-encoding in the direction of the excitation gradient.

公开(公告)号：EP0210038A3

公开(公告)日：1988-02-24

申请号：EP86305423

申请日：1986-07-15

Applicant: TECHNICARE CORPORATION

Inventor： Kormos, Donald William ,  Dewhurst, Henry Samuel ,  Yeung, Hong-Ning

IPC: G01N24/08

CPC classification number: G01R33/56563 ,  G01R33/485

Abstract: In an NMR system, two chemical shift components are separated by correcting NMR data for field inhomogeneity. A first image data set is acquired which contains no chemical shift information or field inhomogeneity. A second image data set is acquired which contains both chemical shift information and field inhomogeneity. A third image data set is acquired which contains field inhomogeneity information. The first and third image data sets are combined to identify the field inhomogeneity information. This intermediate field image is then used to correct the second image data set for field inhomogeneity. The first image data set and corrected second image data set may then be combined by magnitude reconstruction of complex sums and differences to separate the two chemical shift components.

公开(公告)号：EP0136812A3

公开(公告)日：1986-08-20

申请号：EP84305829

申请日：1984-08-24

Applicant: TECHNICARE CORPORATION

Inventor： Yeung, Hong-Ning

IPC: G01N24/08 ,  A61B05/05 ,  A61K49/00

CPC classification number: G01R33/5601

Abstract: Reagents for enhancing the contrast of nuclear magnetic images of biological tissues. By contacting the tissues to be imaged with a complex comprising a macromolecule attached to a paramagnetic ion, wherein the macromolecule is tissue specific and the complex has a correlation time of reorientation or a correlation time of rotation of ligands comparable to the Larmor period, the target atom (proton) relaxation rates are altered and the contrast in the images produced by conventional nuclear magnetic resonance techniques is enhanced.

公开(公告)号：EP0136812A2

公开(公告)日：1985-04-10

申请号：EP84305829.8

申请日：1984-08-24

Applicant: TECHNICARE CORPORATION

Inventor： Yeung, Hong-Ning

IPC: G01N24/08 ,  A61B5/05 ,  A61K49/00

CPC classification number: G01R33/5601

Abstract: Reagents for enhancing the contrast of nuclear magnetic images of biological tissues. By contacting the tissues to be imaged with a complex comprising a macromolecule attached to a paramagnetic ion, wherein the macromolecule is tissue specific and the complex has a correlation time of reorientation or a correlation time of rotation of ligands comparable to the Larmor period, the target atom (proton) relaxation rates are altered and the contrast in the images produced by conventional nuclear magnetic resonance techniques is enhanced.

Abstract translation: 用于增强生物组织核磁图像对比度的试剂。 通过使包含连接到顺磁离子的大分子的复合物接触待成像的组织，其中大分子是组织特异性的，并且复合物具有重新取向的相关时间或与拉莫尔周期相当的配体的旋转相关时间，目标 原子（质子）弛豫率被改变，并且通过常规核磁共振技术产生的图像中的对比度增强。

公开(公告)号：EP0145276B1

公开(公告)日：1988-04-06

申请号：EP84307727.2

申请日：1984-11-08

Applicant: TECHNICARE CORPORATION

Inventor： Yeung, Hong-Ning ,  Kao, Chiiming ,  Lent, Arnold Henry

IPC: G01R33/20

CPC classification number: G01R33/565

公开(公告)号：EP0145276A1

公开(公告)日：1985-06-19

申请号：EP84307727.2

申请日：1984-11-08

Applicant: TECHNICARE CORPORATION

Inventor： Yeung, Hong-Ning ,  Kao, Chiiming ,  Lent, Arnold Henry

IPC: G01R33/20

CPC classification number: G01R33/565

Abstract: In an NMR imaging system, an image plane is scanned and NMR signals are collected over a plurality of image lines. The experiment is repeated, with the timing of the excitation pulses changed. Images are formed by performing Fourier transformations of the signal values. A ratio image is then formed by performing a complex division of the two images on a pixel by pixel basis. The ratio values cancel phase error effects in the image data and the use of complex numbers maintains the proper pixel polarity.