Patent US5923770A successfully refreshed from Google Patents.
US5923770A
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3D cardiac motion recovery system using tagged MR images
Assignee: Siemens Medical Solutions USA Inc
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Filing: 1996-09-30
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Granted: 1999-07-13
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Expires: 2016-09-30
Abstract
Abstract A system for recovering cardiac motion includes an overall model, a geodesic-like prismoidal tessellation of the model and constant volume constraints. The overall model includes local deformations and a scaleable default model having a global component and parametric offsets. The offsets provide two features. First, they help to form an expected model shape which facilitates appropriate model data correspondences. Second, they scale with the global component to maintain the expected shape even in the presence of large global deformations. The system is applied to the recovery of 3-D cardiac motion from a volunteer dataset of tagged-MR images.
Inventors
- 👤 Thomas O'Donnell
- 👤 Terrance E. Boult
- 👤 Alok Gupta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:38
CPC Classifications
G; G06; G06T; G06T7/00; G06T7/20; G06T7/246; G06T7/251; G06V; G06V10/00; G06V10/70; G06V10/74; G06V10/75; G06V10/754; G06T2207/00; G06T2207/10; G06T2207/10072; G06T2207/10088; G06T2207/30; G06T2207/30004; G06T2207/30048
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
82 words
A cardiac motion recovery system comprising: an overall model that receives tagged MR images and provides analysis of 3D motion; a tesselator connected to said overall model for tessellating said overall model; and, constant volume constraint means connected to said overall model; wherein said overall model comprises: extraction means for extracting from a data set a gross description of shape and movement for comparison and classification via global parameters; and, retention means for retaining a detailed description of data for geometric measurements.
Claim 2
Dependent Claim
82 words
A cardiac motion recovery system comprising: an overall model that receives tagged MR images and provides analysis of 3D motion; a tesselator connected to said overall model for tessellating said overall model; and, constant volume constraint means connected to said overall model; wherein said overall model comprises: extraction means for extracting from a data set a gross description of shape and movement for comparison and classification via global parameters; and, retention means for retaining a detailed description of data for geometric measurements.
Claim 3
Dependent Claim
32 words
A cardiac motion recovery system as claimed in claim 1 wherein said overall model comprises: a scaleable default model; an overall model builder for receiving said tagged MR images; and, local deformations.
Claim 4
Dependent Claim
22 words
A cardiac motion recovery system as claimed in claim 2 wherein said scaleable default model comprises: a global component; and, parametric offsets.
Claim 5
Dependent Claim
41 words
A cardiac motion recovery system as claimed in claim 3 wherein said parametric offsets comprise: default means for creating a default shape which resembles an object undergoing recovery therefore regions where data is sparse are more likely to be estimated correctly.
Claim 6
Dependent Claim
51 words
A cardiac motion recovery system as claimed in claim 3 wherein said parametric offsets comprise: forming means for forming an expected model shape which facilitates appropriate model data correspondences; and, scaling means for scaling with said global component to maintain an expected shape even in a presence of large global deformations.
Claim 7
Dependent Claim
64 words
A cardiac motion recovery system as claimed in claim 3 wherein said parametric offsets comprise: a trio (u off ,v off ,α off ) plus a point of attachment and an offset vector calculated by evaluating said global component at (u off ,v off ,α off ), and taking a vector difference with said point of attachment (u attach ,v attach ,α attach ).
Claim 8
Dependent Claim
30 words
A cardiac motion recovery system as claimed in claim 3 wherein: said global component is augmented with tapering (along x and y axes), bending and twisting using variations of formulations.
Claim 9
Dependent Claim
35 words
A cardiac motion recovery system as claimed in claim 2 wherein said local deformations comprise: tailoring means for tailoring said scaleable default model to a specific dataset if scaled default shape does not approximate data.
Claim 10
Dependent Claim
33 words
A cardiac motion recovery system as a: claimed in claim 1 wherein: said overall model is capable of describing an expected configuration which facilitates appropriate model scaling as well as proper model-data correspondences.
Claim 11
Dependent Claim
22 words
A cardiac motion recovery system as claimed in claim 1 wherein: said overall model is implemented as a solid, thick-walled ellipsoid model.
Claim 12
Dependent Claim
34 words
A cardiac motion recovery system as claimed in claim 1 wherein said overall model comprises: fusion means for fusing acquisitions of a heart taken from different views registered in time using a model-based approach.
Claim 13
Dependent Claim
38 words
A cardiac motion recovery system as claimed in claim 1 wherein: said tessellator describes said overall model by discrete nodes linearly interpolated to form prismoidal elements which are arranged in a unique configuration based on a geodesic dome.
Claim 14
Dependent Claim
28 words
A cardiac motion recovery system as claimed in claim 1 wherein said tessellator comprises: structural means for providing structural support by basing a nodal distribution on geodesic domes.
Claim 15
Dependent Claim
31 words
A cardiac motion recovery system as claimed in claim 1 wherein said constant volume constraint means comprises: motion means for inferring motion of left ventricle where tag intersections are sparsely distributed.
Claim 16
Dependent Claim
53 words
A cardiac motion recovery system as claimed in claim 1 wherein said tessellator comprises: linking means for linking a first geodesic dome and a second geodesic dome wherein said first geodesic dome describes an inner wall of a left ventricle and said second geodesic dome describes an outer wall of said left ventricle.
Claim 17
Dependent Claim
23 words
A cardiac motion recovery system as claimed in claim 1 wherein said tessellator comprises: linking means for linking a plurality of geodesic domes.
Claim 18
Independent Claim
87 words
A method of recovering cardiac motion comprising the steps of: receiving tagged MR images of LV's; receiving tagged MR images of a specific LV; obtaining an overall model; tessellating said overall model; constraining constant volume; and, providing analysis of 3D LV motion; wherein obtaining an overall model comprises the steps of: extracting from a data set a gross description of shape and movement for comparison and classification via global parameters; and, retaining a detailed description of data for geometric measurements such as surface area and material strain.
Claim 19
Independent Claim
87 words
A method of recovering cardiac motion comprising the steps of: receiving tagged MR images of LV's; receiving tagged MR images of a specific LV; obtaining an overall model; tessellating said overall model; constraining constant volume; and, providing analysis of 3D LV motion; wherein obtaining an overall model comprises the steps of: extracting from a data set a gross description of shape and movement for comparison and classification via global parameters; and, retaining a detailed description of data for geometric measurements such as surface area and material strain.
Claim 20
Dependent Claim
56 words
A method of recovering cardiac motion as claimed in claim 17 wherein tessellating said overall model comprises the step of: linking a first geodesic dome and a second geodesic dome wherein said first geodesic dome describes an inner wall of a left ventricle and said second geodesic dome describes an outer wall of said left ventricle.
References Cited (Backward Citations)
US5065435A
Cited
US5360006A
Cited
US5517602A
Cited
WO1994024640A1
Cited
US5435310A
Cited
US5570430A
Cited
US5689577A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-07-12 | 2003-01-11 | 2003-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-07-12 | 2007-01-11 | 2007-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-07-12 | 2011-01-11 | 2011-07-13 | $7700.00 | Window Closed / Lapsed |