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:
-
- El Cerrito, CA
- Issue Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- OSTI Identifier:
- 865694
- Patent Number(s):
- 4556848
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01R - MEASURING ELECTRIC VARIABLES
- 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}
}