Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Reexamination Certificate
2007-07-04
2011-12-06
Shrivastav, Brij (Department: 2858)
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
C324S309000
Reexamination Certificate
active
08072215
ABSTRACT:
MR imaging of a body (7) placed in an examination volume includes establishing a substantially homogeneous main magnetic field in the examination volume, generating switched magnetic field gradients superimposed upon the main magnetic field, radiating RF pulses towards the body (7), controlling the generation of the magnetic field gradients and the RF pulses, receiving and sampling MR signals, and forming MR images from the signal samples. A sequence of MR echo signals is generated by subjecting at least a portion of the body (7) to a single RF pulse and a plurality of switched magnetic field gradients. The switched magnetic field gradients are controlled to produce at least two sub-sequences of MR echo signals. Each sub-sequence traverses a different trajectory in k-space with subsampling in the phase encoding direction (ky) MR echo signals are acquired and sampled. An MR image is reconstructed from the signal samples and from phase/amplitude correction maps associated with the sub-sequences of MR echo signals.
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Koninklijke Philips Electronics , N.V.
Shrivastav Brij
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