US5873822A
Expired / Lapsed
US
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Automatic registration system for use with position tracking and imaging system for use in medical applications
Assignee: GE Medical Systems Global Technology Co LLC
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Filing: 1996-04-24
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Granted: 1999-02-23
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Expires: 2016-04-24
Abstract
Abstract A system is disclosed for monitoring the position of a medical instrument with respect to a patient's body and for displaying at least one of a plurality of prerecorded images of said body responsive to the position of said medical instrument. In one embodiment the system includes a reference unit secured from movement with respect to the patient's body such that said reference unit is substantially immobile with respect to a target operation site. The system also includes a remote unit for attachment to the medical instrument. A field generator may be associated with one of the units for generating a position characteristic field in an area including the target operation site. One or more field sensors may be associated with either of the units responsive to the presence of the position characteristic field for producing one or more sensor output signals representative of said sensed field. A position detector in communication with the sensor output signal produces position data representative of the position of the remote unit with respect to the reference unit. An output display in communication with the position detector displays at least one of the prerecorded images responsive to the position data.
Inventors
- 👤 Maurice R. Ferre
- 👤 Peter D. Jakab
- 👤 James S. Tieman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:10
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/06; A61B34/00; A61B34/20; A61B5/061; A61B5/062; A61B5/064; A61B6/00; A61B6/02; A61B6/03; A61B6/032; A61B6/037; A61B90/00; A61B90/10; A61B90/14; A61B90/36; A61B90/39; A61B90/90; A61B90/98; G; G01; G01B; G01B7/00; G01B7/004; G06; G06T; G06T3/00; G06T3/14; A61B17/00; A61B2017/00017; A61B2017/00022; A61B2017/0046; A61B2017/00464; A61B2017/00477; A61B2017/00482; A61B2034/2046; A61B2034/2051; A61B2034/2055; A61B2034/2068; A61B2034/2072; A61B90/08; A61B2090/0818; A61B2090/363; A61B2090/3937; A61B2090/3983; A61B90/361
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
150 words
A computerized system for registering the orientation of a patient in a surgical environment with the orientation of prerecorded computerized tomography scan images of said patient, said system comprising: a body attachment unit adapted to be secured to said patient's body; a plurality of radiopaque elements secured to said body attachment unit; identification means for locating positions of said radiopaque elements on said scan images; validation means for evaluating relative distances between each of said radiopaque elements on said scan images, and for producing a matrix of said distances; matrix optimization means for determining an optimal correlation between a matrix of prerecorded distances between said radiopaque elements on said body attachment unit and said matrix of said distances produced by said validation means; and transformation equation generation means for generating an equation that transforms position data with respect to said patient into position data with respect to said scan images.
Claim 2
Dependent Claim
150 words
A computerized system for registering the orientation of a patient in a surgical environment with the orientation of prerecorded computerized tomography scan images of said patient, said system comprising: a body attachment unit adapted to be secured to said patient's body; a plurality of radiopaque elements secured to said body attachment unit; identification means for locating positions of said radiopaque elements on said scan images; validation means for evaluating relative distances between each of said radiopaque elements on said scan images, and for producing a matrix of said distances; matrix optimization means for determining an optimal correlation between a matrix of prerecorded distances between said radiopaque elements on said body attachment unit and said matrix of said distances produced by said validation means; and transformation equation generation means for generating an equation that transforms position data with respect to said patient into position data with respect to said scan images.
Claim 3
Dependent Claim
34 words
A system as claimed in claim 1, wherein said identification means includes image intensity filter means for filtering image picture elements representing said radiopaque elements from image picture elements not representing said radiopaque elements.
Claim 4
Dependent Claim
133 words
A computerized system for registering the orientation of a patient in a surgical environment with the orientation of computerized tomography scan images of said patient, said system comprising: a body attachment unit adapted to be secured to said patient's body; a plurality of radiopaque elements secured to said body attachment unit said plurality of radiopaque elements being mutually spaced from one another by prearranged known distances; identification means for locating positions of said radiopaque elements on said scan images; evaluation means for determining relative distances between each of said radiopaque elements on said scan images; correlation means for correlating said relative distances with said prearranged known distances between said radiopaque elements; and verification means for producing an output signal that is representative of the correlation of said relative distances and said known distances.
Claim 5
Dependent Claim
133 words
A computerized system for registering the orientation of a patient in a surgical environment with the orientation of computerized tomography scan images of said patient, said system comprising: a body attachment unit adapted to be secured to said patient's body; a plurality of radiopaque elements secured to said body attachment unit said plurality of radiopaque elements being mutually spaced from one another by prearranged known distances; identification means for locating positions of said radiopaque elements on said scan images; evaluation means for determining relative distances between each of said radiopaque elements on said scan images; correlation means for correlating said relative distances with said prearranged known distances between said radiopaque elements; and verification means for producing an output signal that is representative of the correlation of said relative distances and said known distances.
Claim 6
Dependent Claim
23 words
A system as claimed in claim 3, wherein said verification means includes comparison means for comparing a correlation value with a threshold value.
Claim 7
Dependent Claim
23 words
A system as claimed in claim 4, wherein said comparison means produces an error signal if said correlation value exceeds said threshold value.
Claim 8
Dependent Claim
27 words
A system as claimed in claim 3, wherein said identification means includes intensity valuation means for evaluating the image brightnes of various areas of the scan images.
Claim 9
Dependent Claim
117 words
A computerized system for registering the orientation of a patient in a surgical environment with the orientation of computerized tomography scan images of said patient, said system comprising: a body attachment unit adapted to be secured to said patient's body; identification means for locating a plurality of fiducial points on said body attachment unit that appear on said scan images; evaluation means for determining a relative geometry defined by said plurality of fiducial points on said scan images; correlation means for correlating said relative geometry with a known geometry of said plurality of fiducial points; and verification means for producing an output signal that is representative of the correlation of said relative geometry and said known geometry.
Claim 10
Dependent Claim
117 words
A computerized system for registering the orientation of a patient in a surgical environment with the orientation of computerized tomography scan images of said patient, said system comprising: a body attachment unit adapted to be secured to said patient's body; identification means for locating a plurality of fiducial points on said body attachment unit that appear on said scan images; evaluation means for determining a relative geometry defined by said plurality of fiducial points on said scan images; correlation means for correlating said relative geometry with a known geometry of said plurality of fiducial points; and verification means for producing an output signal that is representative of the correlation of said relative geometry and said known geometry.
Claim 11
Dependent Claim
23 words
A system as claimed in claim 7, wherein said verification means includes comparison means for comparing a correlation value with a threshold value.
Claim 12
Dependent Claim
23 words
A system as claimed in claim 8, wherein said comparison means produces an error signal if said correlation value exceeds said threshold value.
Claim 13
Dependent Claim
43 words
A system as claimed in claim 7, wherein said system further includes transformation equation means in communication with said correlation means for generating an equation that transforms position data with respect to said patient into position data with respect to said scan images.
References Cited (Backward Citations)
US3109588A
Cited
US3614950A
Cited
US3644825A
Cited
US3821469A
Cited
US3868565A
Cited
US4017858A
Cited
US3983474A
Cited
US4054881A
Cited
US4298874A
Cited
US4262306A
Cited
US4182312A
Cited
US4256112A
Cited
US4341220A
Cited
US4314251A
Cited
US4608977A
Cited
US4319136A
Cited
US4328548A
Cited
US4346384A
Cited
US4688037A
Cited
US4638798A
Cited
GB2094590A
Cited
US4506676A
Cited
US4651732A
Cited
US4613866A
Cited
US4701049A
Cited
US4618978A
Cited
US4660970A
Cited
US4753528A
Cited
US4841967A
Cited
US4583538A
Cited
US4617925A
Cited
GB2164856B
Cited
US4705395A
Cited
US4706665A
Cited
DE3508730A1
Cited
US4782239A
Cited
US4838265A
Cited
US4764016A
Cited
US4743771A
Cited
US4805615A
Cited
US4705401A
Cited
US4737032A
Cited
US4779212A
Cited
US4709156A
Cited
US4794262A
Cited
US4737794A
Cited
US4742356A
Cited
US4821731A
Cited
US4822163A
Cited
US4723544A
Cited
US4821220A
Cited
US4791934A
Cited
US4733969A
Cited
US4743770A
Cited
US4761072A
Cited
US4750487A
Cited
US4825091A
Cited
US4745290A
Cited
US4804261A
Cited
US4875478A
Cited
US4809694A
Cited
US5186174A
Cited
US4836778A
Cited
FR2618211B1
Cited
US4829373A
Cited
US4931056A
Cited
US4923459A
Cited
US4945914A
Cited
US5178164A
Cited
US5119817A
Cited
US4991579A
Cited
US5016639A
Cited
US5142930A
Cited
US5211164A
Cited
US5094241A
Cited
US5097839A
Cited
US4875165A
Cited
US5027818A
Cited
US5251127A
Cited
US4869247A
Cited
US4884566A
Cited
US4860331A
Cited
US5099846A
Cited
US5098426A
Cited
US5197476A
Cited
US5285787A
Cited
US5257998A
Cited
US5224049A
Cited
US5107839A
Cited
US5017139A
Cited
US5193106A
Cited
US5622170A
Cited
US5383454A
Cited
US5383454B1
Cited
US5480439A
Cited
US5279309A
Cited
US5261404A
Cited
US5207688A
Cited
US5330485A
Cited
US5230623A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-02-22 | 2002-08-24 | 2003-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-02-22 | 2006-08-24 | 2007-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-02-22 | 2010-08-24 | 2011-02-23 | $7700.00 | Window Closed / Lapsed |