Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Reexamination Certificate
2005-05-31
2005-05-31
Lefkowitz, Edward (Department: 2862)
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
Reexamination Certificate
active
06900634
ABSTRACT:
In a magnetic resonance spectroscopy method, an excitation RF pulse is emitted with simultaneous emission of a first gradient during an excitation segment having a time duration corresponding to a transmission duration of the excitation RF pulse, a first refocusing RF pulse is emitted that has a first phase with respect to the excitation RF pulse with simultaneous emission of a second gradient during a first refocusing segment that temporally immediately follows the excitation segment and has a time duration corresponding to a transmission duration of the first refocusing RF pulse, an intermediate segment is allowed to elapse immediately temporally following the first refocusing segment for, among other things, temporal positioning of a secondary spin echo, a second refocusing RF pulse is emitted that has a second phase with respect to the excitation RF pulse, with simultaneous emission of a third gradient during a second refocusing segment immediately temporally following the intermediate segment and having a time duration corresponding to a transmission duration of the second refocusing RF pulse, the secondary spin echo is acquired during an acquisition segment immediately temporally following the second refocusing segment, and the aforementioned steps are repeated with a variation of phases of the RF pulses corresponding to a phase cycle.
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