Magnetic resonance imaging method involving sub-sampling

Details Magnetic resonance imaging method involving sub-sampling Magnetic resonance imaging method involving sub-sampling

2007-05-08

2007-05-08

Shrivastav, Brij (Department: 2859)

Demodulators

Phase shift keying or quadrature amplitude demodulator

Input signal combined with local oscillator or carrier...

Reexamination Certificate

active

10496388

ABSTRACT:
In a magnetic resonance imaging method magnetic resonance signal samples are received for a predetermined field of view by a receiving antenna having a spatial sensitivity profile. The sampling in the k space corresponds to the predetermined field of view in the geometrical space. Folded-over images having folded-over pixel values are reconstructed from the sampled magnetic resonance signals. Pixel contributions for spatial positions within the predetermined field of view are calculated from the folded-over pixel values and the spatial sensitivity profile of the receiver antenna. The magnetic resonance image is formed from the pixel contributions for spatial positions within the predetermined field of view. Thus, aliasing or fold-over artefacts caused by a field of view that is too small are avoided.

REFERENCES:
patent: 6326786 (2001-12-01), Pruessmann et al.
patent: WO 99/54746 (1999-10-01), None
patent: WO 02/10787 (2002-02-01), None
Vlaardingerbroek, et al.; Magnetic Resonance Imaging, 2nd ed.; Section 2.4.1.1.
Pruessmann, K., et al.; SENSE: Sensitivity Encoding for Fast MRI; Magnetic Resonance in Medicine; vol. 42: 1999, pp. 952-962.
Hu, X., et al.; Reduction of Field of View for Dynamic Imaging; 1994; MRM; 39-691-694.
Kellman, P., et al.; Adaptive Sensitivity Encoding Incorporating Temporal Filtering (TSENSE); 2001; MRM; 45(5) 846-852.

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