FREQUENCY SWEPT EXCITATION FOR MAGNETIC RESONANCE
First Claim
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1. A method comprising:
- exciting a specimen with a sweeping frequency excitation having a plurality of alternating excitation segments and quiescent segments, the excitation segments modulated according to at least one of a phase modulation function and a frequency modulation function;
applying at least one functional pulse;
acquiring a time domain signal from the specimen based on resonance during a plurality of the quiescent segments; and
processing the acquired time domain signal.
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Abstract
A method of magnetic resonance is provided that uses a frequency swept excitation wherein the acquired signal is a time domain signal is provided. In one embodiment, the method comprises, applying a sweeping frequency excitation and acquiring a time domain signal. The sweeping frequency excitation has a duration and is configured to sequentially excite isochromats having different resonant frequencies. Acquisition of the time domain signal is done during the duration of the sweeping frequency excitation. The time domain signal is based on evolution of the isochromats.
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Citations
24 Claims
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1. A method comprising:
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exciting a specimen with a sweeping frequency excitation having a plurality of alternating excitation segments and quiescent segments, the excitation segments modulated according to at least one of a phase modulation function and a frequency modulation function; applying at least one functional pulse; acquiring a time domain signal from the specimen based on resonance during a plurality of the quiescent segments; and processing the acquired time domain signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification