Magnetic resonance transmitter
AssigneeSchlumberger Technology Corporation
InventorYi-Qiao Song
Life of this patent
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Abstract
A transmitter for a magnetic resonance (MR) system, such as nuclear magnetic resonance (NMR) system, is described herein. The transmitter includes a coil for applying NMR pulse sequences to a substance. The coil includes a first coil section and a second coil section. The first coil section and second coil section pass current in opposite polarity. The transmitter may also include a transmitter circuit for generating the NMR pulse sequences and providing the NMR pulse sequences to the coil. The transmitter circuit includes a first switch that selectively powers the first coil section and a second switch that selectively powers the second coil section. Operation of the first switch and the second switch generates the NMR pulse sequences.
Claims17
An apparatus comprising:
- a coil for applying magnetic resonance (MR) pulse sequences to a substance, the coil comprising:
- a first coil section having a first winding length along a longitudinal axis of the coil;
- and
- a second coil section having a second winding length along the longitudinal axis of the coil, wherein the first coil section and second coil section pass current in opposite polarity, and wherein at least a portion of the first winding length overlaps with at least a portion of the second winding length along the longitudinal axis of the coil;
- and
- a transmitter circuit for generating the MR pulse sequences and providing the MR pulse sequences to the coil;
- wherein the transmitter circuit further comprises
- a first switch coupled to the first coil section and configured to selectively power the first coil section;
- a second switch coupled to the second coil section and configured to selectively power the second coil section.
A method for applying radio frequency pulses to a substance, the method comprising:
- applying current to a first coil section of a coil, the first coil section having a first winding length along a longitudinal axis of the coil;
- and
- applying current to a second coil section of the coil, the second coil section having a second winding length along the longitudinal axis of the coil, wherein current passes through the first and second coil sections in opposite polarity, and wherein at least a portion of the first winding length overlaps with at least a portion of the second winding length along the longitudinal axis of the coil;
- wherein the current is selectively applied to the first coil section using a first switch and the current is selectively applied to the second coil section using a second switch.
A magnetic resonance (MR) system comprising:
- a coil comprising:
- a first coil section having a first winding length along a longitudinal axis of the coil;
- a second coil section having a second winding length along the longitudinal axis of the coil, wherein the first coil section and second coil section are configured in opposite polarity, and wherein at least a portion of the first winding length overlaps with at least a portion of the second winding length along the longitudinal axis of the coil;
- a first transistor coupled to the first coil section and configured to selectively power the first coil section;
- and
- a second transistor coupled to the second coil section and configured to selectively power the second coil section.
Dependencies are inferred from the claim text.