US4982328A
Expired / Lapsed
US
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Method and system for correcting magnetic resonance images for animation display
Assignee: Toshiba Corp
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Filing: 1988-10-14
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Granted: 1991-01-01
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Expires: 2008-10-14
Abstract
Abstract In an MRI (magnetic resonance imaging) apparatus, MR (magnetic resonance) images of a subject for animation-display are acquired in accordance with a predetermined timing. The timing is obtained by measuring a signal representing a biological phenomenon, for example, an electrocardiogram signal. The acquired MR images are corrected. An ROI (region of interest) for the MR images is set and standard MR image is designated among the acquired MR images. An average image value of the MR images in the ROI is calculated based on a difference in average image value between the designated standard MR image and other MR images in the ROI. The other MR images are corrected in accordance with the difference of the average image value.
Inventors
- 👤 Takao Kasugai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:59
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/44; G01R33/48; G01R33/54; G01R33/56; G01R33/567; G01R33/5673
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
61 words
A method for correcting magnetic resonance images utilized for animation-display, the method comprising the steps of: acquiring the magnetic resonance images in accordance with a given timing; correcting the acquired magnetic resonance images by obtaining an agreement with an average image value among the acquired magnetic resonance images in a region of interest; and displaying the corrected acquired magnetic resonance images.
Claim 2
Independent Claim
61 words
A method for correcting magnetic resonance images utilized for animation-display, the method comprising the steps of: acquiring the magnetic resonance images in accordance with a given timing; correcting the acquired magnetic resonance images by obtaining an agreement with an average image value among the acquired magnetic resonance images in a region of interest; and displaying the corrected acquired magnetic resonance images.
Claim 3
Dependent Claim
22 words
A method according to claim 1, wherein the magnetic resonance images are acquired in synchronization with a heart rate of a subject.
Claim 4
Independent Claim
140 words
A method for correcting magnetic resonance images utilized for animation-display, the method comprising the steps of: acquiring the magnetic resonance images in accordance with a given timing; correcting the acquired magnetic resonance images by obtaining agreement with an average image values among the acquired magnetic resonance images in regions of interest wherein the correcting step includes the steps of: setting the regions of interest of the acquired magnetic resonance images; selecting a standard magnetic resonance image among the acquired magnetic resonance images; calculating the average image values of the magnetic resonance images in the set regions of interest; detecting differences of the average image values between the standard magnetic resonance image and other magnetic resonance images; and adjusting image values of the other magnetic resonance images in accordance with the detected differences; an displaying the corrected acquired magnetic resonance images.
Claim 5
Independent Claim
140 words
A method for correcting magnetic resonance images utilized for animation-display, the method comprising the steps of: acquiring the magnetic resonance images in accordance with a given timing; correcting the acquired magnetic resonance images by obtaining agreement with an average image values among the acquired magnetic resonance images in regions of interest wherein the correcting step includes the steps of: setting the regions of interest of the acquired magnetic resonance images; selecting a standard magnetic resonance image among the acquired magnetic resonance images; calculating the average image values of the magnetic resonance images in the set regions of interest; detecting differences of the average image values between the standard magnetic resonance image and other magnetic resonance images; and adjusting image values of the other magnetic resonance images in accordance with the detected differences; an displaying the corrected acquired magnetic resonance images.
Claim 6
Independent Claim
74 words
A system for correcting magnetic resonance images utilized for animation-display, the system comprising: acquiring means for acquiring the magnetic resonance images in accordance with a given timing; correcting means for correcting the magnetic resonance images acquired by the acquiring means by obtaining an agreement with an average image value among the acquired magnetic resonance images in a region of interest; and displaying means for displaying the magnetic resonance images corrected by the correcting means.
Claim 7
Independent Claim
74 words
A system for correcting magnetic resonance images utilized for animation-display, the system comprising: acquiring means for acquiring the magnetic resonance images in accordance with a given timing; correcting means for correcting the magnetic resonance images acquired by the acquiring means by obtaining an agreement with an average image value among the acquired magnetic resonance images in a region of interest; and displaying means for displaying the magnetic resonance images corrected by the correcting means.
Claim 8
Dependent Claim
22 words
A system according to claim 4, wherein the magnetic resonance images are acquired in synchronization with a heart rate of a subject.
Claim 9
Independent Claim
161 words
A system for correcting magnetic resonance images utilized for animation-display, the system comprising: acquiring means for acquiring the magnetic resonance images in accordance with a given timing; correcting means for correcting the acquired magnetic resonance images by obtaining an agreement of average image values among the acquired magnetic resonance images in regions of interest wherein the correcting means comprises: region setting means for setting the regions of interest of the acquired magnetic resonance images; standard image selecting means for designating selecting a standard magnetic resonance image among the acquired magnetic resonance images; calculating means for calculating the average image values of the magnetic resonance images in the regions of interest set by the region setting means; and adjusting means for adjusting image values of other magnetic resonance images in accordance with differences of the average image values between the selected standard magnetic resonance image and the other magnetic resonance images; and displaying means for displaying the corrected acquired magnetic resonance images.
Claim 10
Independent Claim
161 words
A system for correcting magnetic resonance images utilized for animation-display, the system comprising: acquiring means for acquiring the magnetic resonance images in accordance with a given timing; correcting means for correcting the acquired magnetic resonance images by obtaining an agreement of average image values among the acquired magnetic resonance images in regions of interest wherein the correcting means comprises: region setting means for setting the regions of interest of the acquired magnetic resonance images; standard image selecting means for designating selecting a standard magnetic resonance image among the acquired magnetic resonance images; calculating means for calculating the average image values of the magnetic resonance images in the regions of interest set by the region setting means; and adjusting means for adjusting image values of other magnetic resonance images in accordance with differences of the average image values between the selected standard magnetic resonance image and the other magnetic resonance images; and displaying means for displaying the corrected acquired magnetic resonance images.
References Cited (Backward Citations)
US4409550A
Cited
US4564017A
Cited
US4682109A
Cited
US4614195A
Cited
US4779620A
Cited
US4663591A
Cited
US4724386A
Cited
US4769760A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-31 | 1994-07-02 | 1995-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-31 | 1998-07-02 | 1999-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-31 | 2002-07-02 | 2003-01-01 | $7700.00 | Window Closed / Lapsed |