Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1997-03-04
1998-10-20
Arana, Louis M.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
324307, G01V 300
Patent
active
058251863
ABSTRACT:
A scan using an NMR imaging system is carried out while applying an oscillating stress to generate shear waves in the object being imaged. An alternating magnetic field gradient synchronized with the applied stress is employed in the NMR imaging pulse sequence to produce phase dispersion in the acquired NMR signals caused by the shear waves. The brightness of a reconstructed modulus image is thus modulated by the shear waves and this reveals mechanical properties of the object, such as stiffness.
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Ehman Richard L.
Muthupillai Raja
Arana Louis M.
Mayo Foundation for Medical Education and Research
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