Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1997-08-19
2000-10-24
Arana, Louis
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
600422, G01V 300
Patent
active
061372919
ABSTRACT:
An MR coil array includes a plurality of telescopically arranged coil units, spanning the length of an extremity (e.g. a leg). The coil in each unit encircles the extremity, providing good SNR from all sides and for deep structures as well. The tapered shape of the array conforms generally to the patient anatomy, minimizing sensing distances, further enhancing SNR. A low ratio between the volume imaged and the aggregate coil conductor length further contributes to high SNR. A multiplicity of tuning capacitors makes the array relatively insensitive to detuning by differently-sized patients. Adjoining coils can be oriented to produce perpendicular magnetic fields, reducing coupling therebetween. An apparatus employing two such coil arrays allows imaging of two extremities at once.
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Kojima Kryss
Szumowski Jerzy
Arana Louis
Oregon Health & Sciences University
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