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Title: Point sensitive NMR imaging system using a magnetic field configuration with a spatial minimum

Abstract

A point-sensitive NMR imaging system (10) in which a main solenoid coil (11) produces a relatively strong and substantially uniform magnetic field and a pair of perturbing coils (PZ1 and PZ2) powered by current in the same direction superimposes a pair of relatively weak perturbing fields on the main field to produce a resultant point of minimum field strength at a desired location in a direction along the Z-axis. Two other pairs of perturbing coils (PX1, PX2; PY1, PY2) superimpose relatively weak field gradients on the main field in directions along the X- and Y-axes to locate the minimum field point at a desired location in a plane normal to the Z-axes. An RF generator (22) irradiates a tissue specimen in the field with radio frequency energy so that desired nuclei in a small volume at the point of minimum field strength will resonate.

Inventors:
 [1]
  1. El Cerrito, CA
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
865694
Patent Number(s):
4556848
Assignee:
United States of America as represented by United States (Washington, DC)
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
sensitive; nmr; imaging; magnetic; field; configuration; spatial; minimum; point-sensitive; 10; main; solenoid; coil; 11; produces; relatively; strong; substantially; uniform; pair; perturbing; coils; pz1; pz2; powered; current; direction; superimposes; weak; fields; produce; resultant; strength; desired; location; z-axis; pairs; px1; px2; py1; py2; superimpose; gradients; directions; x-; y-axes; locate; plane; normal; z-axes; rf; generator; 22; irradiates; tissue; specimen; radio; frequency; energy; nuclei; volume; resonate; nmr imaging; uniform magnetic; field gradient; field gradients; desired location; plane normal; relatively strong; radio frequency; magnetic field; substantially uniform; field strength; relatively weak; frequency energy; rf generator; tissue specimen; solenoid coil; field configuration; sensitive nmr; /324/

Citation Formats

Eberhard, Philippe H. Point sensitive NMR imaging system using a magnetic field configuration with a spatial minimum. United States: N. p., 1985. Web.
Eberhard, Philippe H. Point sensitive NMR imaging system using a magnetic field configuration with a spatial minimum. United States.
Eberhard, Philippe H. Tue . "Point sensitive NMR imaging system using a magnetic field configuration with a spatial minimum". United States. https://www.osti.gov/servlets/purl/865694.
@article{osti_865694,
title = {Point sensitive NMR imaging system using a magnetic field configuration with a spatial minimum},
author = {Eberhard, Philippe H},
abstractNote = {A point-sensitive NMR imaging system (10) in which a main solenoid coil (11) produces a relatively strong and substantially uniform magnetic field and a pair of perturbing coils (PZ1 and PZ2) powered by current in the same direction superimposes a pair of relatively weak perturbing fields on the main field to produce a resultant point of minimum field strength at a desired location in a direction along the Z-axis. Two other pairs of perturbing coils (PX1, PX2; PY1, PY2) superimpose relatively weak field gradients on the main field in directions along the X- and Y-axes to locate the minimum field point at a desired location in a plane normal to the Z-axes. An RF generator (22) irradiates a tissue specimen in the field with radio frequency energy so that desired nuclei in a small volume at the point of minimum field strength will resonate.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {1}
}

Patent:

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