Method of magnetic resonance reconstruction imaging from projections using partial data collected in k-space
July 24, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMoving gradient zeugmatography Magnetic resonance imaging method NMR imaging method Rapid NMR imaging system High speed NMR spectroscopic imaging method Magnetic resonance imaging and spectroscopy using an excitation pulse for multiple-dimensional selectivity Magnetic resonance imaging of short T2 species Pulsed field MRI system with non-resonant excitation Magnetic resonance imaging and spectroscopy using a linear class of large tip-angle selective excitation pulses Patent #: 5105152 InventorAssigneeApplicationNo. 736268 filed on 07/24/1991US Classes:324/309, To obtain localized resonance within a sample324/307Using a nuclear resonance spectrometer systemExaminersPrimary: Tokar, MichaelAssistant: Mah, Raymond Y. Attorney, Agent or FirmInternational ClassG01R 033/20AbstractThe acquisition of radial lines in 2-D Fourier space (k-space) allows the realization of the extremely short echo times useful in the imaging of short-T2 species and flow using Magnetic Resonance (MR). The disadvantage of this imaging method, which is also known as projection reconstruction, is that in order to prevent aliasing at a given resolution, π times as many excitations are required as the conventional 2-D Fourier transform or spin-warp acquisition. Disclosed is an acquisition and reconstruction method that reduces the required number of radial lines and excitations by using the properties that projections are real or have slowly varying phase and the at radial acquisition methods are oversampled at the center of k-space. This method preserves resolution while reducing imaging time at the expense of signal-to-noise ratio (SNR). This has been verified with both phantom and human subjects.Other References
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