Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1986-07-10
1988-01-26
Noland, Tom
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
324312, G01R 3320
Patent
active
047219114
ABSTRACT:
A nuclear magnetic resonance tomography apparatus, and a method for operating such an apparatus, generate a tomographic image by projecting acquired signals corresponding to the nuclear spins on a frequency axis as a Fourier line, and the image of the examined slice is calculated by Fourier transformation of the Fourier lines. In the method and apparatus, a number of echo sequences are acquired after excitation of the nuclear spins in the axamination subject by a high frequency pulse. Each echo sequence consists of a selected number of individual echoes occurring in succession within each sequence. In the method and apparatus, entry of these individual echoes into a matrix having a central zero line is controlled such that the first-occuring echoes from each sequence are entered in the matrix on alternating sides of the zero line, i.e., above and below the zero line, at increasing distances from the zero line. After all of the first-occurring echoes have been entered, the same alternating entry format is undertaken for the second-occurring echoes in each sequence, and so on until all echoes from all sequences have been entered in the matrix.
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Noland Tom
Siemens Aktiengesellschaft
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