Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1993-02-24
1995-05-30
Arana, Louis
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
324307, G01V 300
Patent
active
054205093
ABSTRACT:
In a magnetic resonance imaging apparatus of a multi-slice scheme, data of a low frequency component in a phase-encoding direction are acquired from a predetermined number of slices within a predetermined repetition time corresponding to a desired contrast, data of a high frequency component in the phase-encoding direction are acquired from slices, which are different depending on a sign of a frequency thereof and which number is half the predetermined number of slices, within a repetition time shorter than the predetermined repetition time. Complex conjugate data of the acquired data or 0 data are utilized as data which are not acquired, thereby reconstructing images of the predetermined number of slices. Since data of slices that cannot be acquired due to shortening of the repetition time can be restored by utilizing the complex conjugate data or 0 data of the acquired data, the scanning time can be shortened without decreasing the number of slices to be acquired. In another magnetic resonance imaging apparatus, when the repetition time is short, the data acquisition time per slice is shortened accordingly, so that the number of slices that can be acquired within the minimum repetition time TR corresponds to the number of slices that can be acquired within the maximum repetition time TR.
REFERENCES:
patent: 5168227 (1992-12-01), Foo et al.
Arana Louis
Kabushiki Kaisha Toshiba
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