Nuclear magnetic resonance apparatus having semitoroidal rf coil for use in topical NMR and NMR imaging

Patent · Wed Jan 01 04:00:00 EST 1986

OSTI ID:865860

Fukushima, Eiichi ^[1]; Roeder, Stephen B. W. ^[2]; Assink, Roger A ^[3]; Gibson, Atholl A. V. ^[4]

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1. Los Alamos, NM
2. La Mesa, CA
3. Albuquerque, NM
4. Bryan, TX

An improved nuclear magnetic resonance (NMR) apparatus for use in topical magnetic resonance (TMR) spectroscopy and other remote sensing NMR applications includes a semitoroidal radio-frequency (rf) coil. The semitoroidal rf coil produces an effective alternating magnetic field at a distance from the poles of the coil, so as to enable NMR measurements to be taken from selected regions inside an object, particularly including human and other living subjects. The semitoroidal rf coil is relatively insensitive to magnetic interference from metallic objects located behind the coil, thereby rendering the coil particularly suited for use in both conventional and superconducting NMR magnets. The semitoroidal NMR coil can be constructed so that it emits little or no excess rf electric field associated with the rf magnetic field, thus avoiding adverse effects due to dielectric heating of the sample or to any other interaction of the electric field with the sample.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM
• DOE Contract Number: W-7405-ENG-36
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4590427
• OSTI ID: 865860
• Country of Publication: United States
• Language: English

Related Subjects

/324/505/
adverse
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alternating
alternating magnetic
apparatus
applications
associated
avoiding
coil
constructed
conventional
dielectric
distance
due
effective
effects
electric
electric field
electric heat
emits
enable
excess
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heating
human
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improved
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including
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inside
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living
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magnets
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metallic
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nuclear
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poles
produces
radio-frequency
regions
relatively
relatively insensitive
remote
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rendering
resonance
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rf
rf coil
sample
selected
selected region
selected regions
semitoroidal
sensing
spectroscopy
subjects
suited
superconducting
tmr
topical