US8519707B2 — Pulse gap cycling for improved swift

Claim 1

Independent Claim 82 words

A method comprising: generating magnetic resonance (MR) data for a sample, the data corresponding to an excitation signal having a series of excitation gaps and a series of corresponding received spin system signal gaps, the excitation gaps or received spin system signal gaps having a position that is cycled among a plurality of positions throughout a duration in at least one of the excitation signal or the received spin system signal; and generating, using a processor, an image using the MR data.

Claim 2

Independent Claim 82 words

A method comprising: generating magnetic resonance (MR) data for a sample, the data corresponding to an excitation signal having a series of excitation gaps and a series of corresponding received spin system signal gaps, the excitation gaps or received spin system signal gaps having a position that is cycled among a plurality of positions throughout a duration in at least one of the excitation signal or the received spin system signal; and generating, using a processor, an image using the MR data.

Claim 3

Dependent Claim 15 words

The method of claim 1 wherein generating MR data includes using a SWIFT MR sequence.

Claim 4

Dependent Claim 17 words

The method of claim 1 wherein generating MR data includes using a fast 3D radial MR sequence.

Claim 5

Dependent Claim 27 words

The method of claim 1 wherein generating MR data includes using a sequence that generates nearly simultaneous excitation and acquisition of spins within a gapped RF pulse.

Claim 6

Dependent Claim 34 words

The method of claim 1 wherein the gap is cycled within a predetermined period of time among discrete positions numbering at least one of 2, 3, 4, 5, 6, 8, 12, 16, and 24.

Claim 7

Dependent Claim 13 words

The method of claim 1 wherein the received spin system signal is oversampled.

Claim 8

Dependent Claim 23 words

The method of claim 1 wherein generating the image includes estimating overlap of a sideband relative to a baseband in the excitation signal.

Claim 9

Dependent Claim 18 words

The method of claim 1 wherein generating the image includes postprocessing using gridding with an oversampled Kaiser-Bessel kernel.

Claim 10

Dependent Claim 16 words

The method of claim 1 wherein generating the image includes post-processing using an average smoothness constraint.

Claim 11

Dependent Claim 13 words

The method of claim 1 wherein generating the image includes reversing a gradient.

Claim 12

Dependent Claim 16 words

The method of claim 1 wherein generating the image includes summing a plurality of data sets.

Claim 13

Dependent Claim 70 words

A non-transitory computer-readable medium having computer-executable instructions stored thereon for performing a method comprising: generating magnetic resonance (MR) data for a sample using an excitation sequence configured to image spins having a fast transverse relaxation rate and an acquisition sequence having a gap having a gap position that is time-cycled among a plurality of positions throughout a duration of the acquisition sequence; and generating an image using the MR data.

Claim 14

Dependent Claim 70 words

A non-transitory computer-readable medium having computer-executable instructions stored thereon for performing a method comprising: generating magnetic resonance (MR) data for a sample using an excitation sequence configured to image spins having a fast transverse relaxation rate and an acquisition sequence having a gap having a gap position that is time-cycled among a plurality of positions throughout a duration of the acquisition sequence; and generating an image using the MR data.

Claim 15

Dependent Claim 17 words

The non-transitory computer-readable medium of claim 12 wherein the method includes summing at least four data sets.

Claim 16

Dependent Claim 13 words

The non-transitory computer-readable medium of claim 12 wherein the acquisition sequence is oversampled.

Claim 17

Independent Claim 107 words

A system comprising: a magnetic resonance scanner; and a processor coupled to the scanner and configured to generate magnetic resonance (MR) data for a sample, the data corresponding to an excitation signal having a series of excitation gaps and a series of corresponding received spin system signal gaps, the excitation gaps or received spin system signal gaps having a position that is cycled among a plurality of positions throughout a duration in at least one of the excitation signal or the received spin system signal; an output device configured to at least one of generate an image based on the MR data or store the MR data.

Claim 18

Independent Claim 107 words

A system comprising: a magnetic resonance scanner; and a processor coupled to the scanner and configured to generate magnetic resonance (MR) data for a sample, the data corresponding to an excitation signal having a series of excitation gaps and a series of corresponding received spin system signal gaps, the excitation gaps or received spin system signal gaps having a position that is cycled among a plurality of positions throughout a duration in at least one of the excitation signal or the received spin system signal; an output device configured to at least one of generate an image based on the MR data or store the MR data.

Claim 19

Dependent Claim 23 words

The system of claim 15 wherein the processor is configured to implement a user-selected duty cycle, the duty cycle corresponding to the gap.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2016-08-26	2017-02-25	2017-08-27	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2020-08-26	2021-02-25	2021-08-27	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2024-08-26	2025-02-25	2025-08-27	$7700.00	Window Closed / Lapsed

Pulse gap cycling for improved swift

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