Patent US5214530A successfully refreshed from Google Patents.
Patent US6564082B2 successfully refreshed from Google Patents.
US6564082B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for incremental field-of-view-MR imaging
Assignee: General Electric Co
•
Filing: 2001-04-19
•
Granted: 2003-05-13
•
Expires: 2021-04-19
Abstract
Abstract A method for producing an image of a volume of interest using a Magnetic Resonance Imaging (MRI) system comprising the steps of acquiring a plurality of under-sampled Magnetic Resonance (MR) data sets for a plurality of regions of the volume of interest along an axis of translation within the MRI system and reconstructing the image of the volume of interest using the respective under-sampled MR data sets.
Inventors
- 👤 Yudong Zhu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:42
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/46; A61B6/467; A61B6/469; G; G01; G01R; G01R33/00; G01R33/20; G01R33/44; G01R33/48; G01R33/54; G01R33/56; G01R33/563; G01R33/565; G01R33/56545; A61B5/00; A61B5/72; A61B5/7235; A61B5/7253; A61B5/7257; G01R33/561; G01R33/5611
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
64 words
A method for producing an image of a volume of interest using a Magnetic Resonance Imaging (MRI) system comprising: acquiring a plurality of under-sampled Magnetic Resonance (MR) data sets for a plurality of regions of said volume of interest along an axis of translation within the MRI system; and, reconstructing said image of said volume of interest using said respective under-sampled MR data sets.
Claim 2
Independent Claim
64 words
A method for producing an image of a volume of interest using a Magnetic Resonance Imaging (MRI) system comprising: acquiring a plurality of under-sampled Magnetic Resonance (MR) data sets for a plurality of regions of said volume of interest along an axis of translation within the MRI system; and, reconstructing said image of said volume of interest using said respective under-sampled MR data sets.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein the acquiring step uses an excitation pulse with non-uniform spatial selectivity along the translation axis.
Claim 4
Dependent Claim
20 words
The method of claim 1 wherein the acquiring step uses a receive coil with non-uniform sensitivity along the translation axis.
Claim 5
Dependent Claim
21 words
The method of claim 2 wherein said non-uniform spatially selective excitation pulse is a RF excitation pulse having a Gaussian profile.
Claim 6
Dependent Claim
17 words
The method of claim 3 wherein said receive coil with non-uniform spatial sensitivity is a surface coil.
Claim 7
Dependent Claim
17 words
The method of claim 3 wherein said receive coil with non-uniform spatial sensitivity is a birdcage coil.
Claim 8
Dependent Claim
18 words
The method of claim 1 wherein said translation is translation of said volume relative to an imaged location.
Claim 9
Dependent Claim
24 words
The method of claim 1 wherein said volume is fixed in space and said translation is translation of spatial selectivity relative to said volume.
Claim 10
Dependent Claim
28 words
The method of claim 1 wherein said axis of translation is the z-axis of the MRI system and said translation is stepped and synchronized with the acquiring step.
Claim 11
Dependent Claim
29 words
The method of claim 1 wherein the reconstructing step is performed by weighting and summing a plurality of regional images computed by said plurality of under-sampled MR data sets.
Claim 12
Dependent Claim
44 words
The method of claim 1 wherein the reconstructing step comprises the steps of: computing a plurality of regional images from said respective under-sampled MR data sets; and, weighting and summing said plurality of regional images to produce said image of said volume of interest.
Claim 13
Dependent Claim
16 words
The method of claim 1 wherein the reconstructing step is performed incrementally during the acquiring step.
Claim 14
Dependent Claim
18 words
The method of claim 1 wherein the reconstructing step is processed in accordance with spatial harmonic synthesizing techniques.
Claim 15
Dependent Claim
17 words
The method of claim 1 wherein the reconstructing step is processed in accordance with sensitivity encoding techniques.
Claim 16
Independent Claim
97 words
A method for producing an image of a volume of interest using a Magnetic Resonance Imaging (MRI) system comprising: incrementing a positioning device along an axis of the MRI system through a plurality of given positions to incrementally define a plurality of respective regions within said volume of interest; acquiring a respective under-sampled MR data set for each of said respective plurality of regions; computing a plurality of regional images corresponding to said under-sampled MR data sets for each of said given positions; and, reconstructing said image of said volume of interest from said respective regional images.
Claim 17
Independent Claim
97 words
A method for producing an image of a volume of interest using a Magnetic Resonance Imaging (MRI) system comprising: incrementing a positioning device along an axis of the MRI system through a plurality of given positions to incrementally define a plurality of respective regions within said volume of interest; acquiring a respective under-sampled MR data set for each of said respective plurality of regions; computing a plurality of regional images corresponding to said under-sampled MR data sets for each of said given positions; and, reconstructing said image of said volume of interest from said respective regional images.
Claim 18
Dependent Claim
20 words
The method of claim 15 wherein the acquiring step uses an excitation pulse with non-uniform spatial selectivity along the axis.
Claim 19
Dependent Claim
19 words
The method of claim 15 wherein the acquiring step uses a receive coil with non-uniform sensitivity along the axis.
Claim 20
Dependent Claim
21 words
The method of claim 16 wherein said non-uniform spatially selective excitation pulse is a RF excitation pulse having a Gaussian profile.
Claim 21
Dependent Claim
31 words
The method of claim 15 wherein the reconstructing step further comprises the steps of: weighting and summing said plurality of regional images to produce said image of said volume of interest.
Claim 22
Dependent Claim
16 words
The method of claim 15 wherein the reconstructing step is performed incrementally during the acquiring step.
Claim 23
Dependent Claim
172 words
The method of claim 15 wherein the reconstructing step is processed in accordance with M ( x , y , z ) = ∑ n M n ( x , y , z ) h ( z + ( n - α ) Δ z ) and M n ( x , y , z ) = ∑ m ( ∫ ∫ S n ( k x , k y , ( m - ɛ ) Δ k z ) j2π ( k x x + k y y ) k x k y ) j2π ( m - ɛ ) Δ k z ( z + ( n - α ) Δ z ) where h(z) is a reconstruction weighting function that is pre-derived from Δ z , Δ kz , and w(z), w(z) being a spatial selectivity.
Claim 24
Dependent Claim
37 words
The method of claim 21 wherein h(z) is derived in accordance with singular value decomposition techniques that minimize ∥h∥ subject to ∥Ah−e 1 ∥<τ, where τ is a scalar representing a maximum level of tolerable residual aliasing.
References Cited (Backward Citations)
US5167232A
Cited
US5298862A
Cited
US5339035A
Cited
US5483158A
Cited
US5423315A
Cited
US5617861A
Cited
US5517118A
Cited
US6037771A
Cited
US6043654A
Cited
US6289232B1
Cited
US6144873A
Cited
US6400151B1
Cited
US6181137B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2006-05-12 | 2006-11-11 | 2007-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-05-12 | 2010-11-11 | 2011-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-05-12 | 2014-11-11 | 2015-05-13 | $7700.00 | Window Closed / Lapsed |