Electricity: measuring and testing – Particle precession resonance
Reexamination Certificate
2006-09-19
2006-09-19
Arana, Louis M. (Department: 2859)
Electricity: measuring and testing
Particle precession resonance
C327S307000
Reexamination Certificate
active
07109705
ABSTRACT:
A method of nuclear quadrupole resonance testing a sample is disclosed in which the excitation applied to the sample is arranged so that phase and amplitude information may be obtained from the response signal, and in which the signal is resolved into two components. Particularly if a parameter such as radio-frequency field strength varies with position, this may give an indication of the distribution of nuclei in the sample, preferably from the phase of the response signal. Positional information can also be obtained by measuring from two or more reference points. This may be employed in imaging. The phase information may be employed to improve the signal to noise ratio obtainable in other methods where only amplitude information was previously available, for example in distinguishing genuine NQR response signals from spurious signals.
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Peirson Neil Francis
Smith John A. S.
Arana Louis M.
BTG International Limited
Pillsbury Winthrop Shaw & Pittman LLP
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