Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Reexamination Certificate
2006-06-20
2006-06-20
Shrivastav, Brij B. (Department: 2859)
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
C324S309000
Reexamination Certificate
active
07064545
ABSTRACT:
The present invention is directed to a method and system of tissue or background suppression for the acquisition of image data from blood flow or tissue perfusion. Background suppression with minimal effects upon inflowing spins is achieved through a series of spin locking low level RF pulses that cause adiabatic demagnetization of tissue with a relaxation time T1-rho that is intermediate between T1 and T2 relaxation times. In this regard, the effective transverse magnetization of static tissue resulting from the application of a series of low level RF pulses is reduced and, with the spin locking, longitudinal magnetization regrowth is minimized. As such, inflowing spins to an imaging volume may be directly imaged with significant background tissue suppression. The present invention is particularly applicable to time-of-flight MRA and MR perfusion imaging.
REFERENCES:
patent: 5192909 (1993-03-01), Hardy et al.
patent: 5256967 (1993-10-01), Foo et al.
patent: 5345174 (1994-09-01), Kimmich et al.
patent: 5619139 (1997-04-01), Holczer et al.
patent: 6094591 (2000-07-01), Foltz et al.
patent: 6275040 (2001-08-01), Zur
patent: 6377831 (2002-04-01), Seshan et al.
patent: 6380739 (2002-04-01), Machida
patent: 6498946 (2002-12-01), Foo et al.
patent: 6501272 (2002-12-01), Haacke et al.
patent: 6618605 (2003-09-01), Wolff et al.
patent: 6903548 (2005-06-01), Foo
Brittain Jean H.
Zaharchuk Gregory G.
Della Penna Michael A.
General Electric Company
Horton Carl B.
Shrivastav Brij B.
The Regents of the University of California
LandOfFree
Method and apparatus of background suppression in MR imaging... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus of background suppression in MR imaging..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus of background suppression in MR imaging... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3694904