Bruker Biospin Mri Gmbh

Bruker Medizintechnik Gmbh

Heinrich Lehr

A method of producing magnetic resonance images wherein a (n&plus;1) dimensional k space is scanned by means of an imaging pulse sequence with at least one RF excitation pulse followed by at least one RF refocusing pulse, wherein an incomplete complex spin echo signal S is read and digitized by means of a quadrature detector, in one part of the read-out interval &lsqb;t &minus;&frac12;t , t &plus;&frac12;t &rsqb; which has a central position about the center (t&equals;t ) of the spin echo signal in the time interval &lsqb;t &minus;&egr;; t &plus;&egr;&rsqb;, with n (n&equals;0,1,2, . . . ) phase encoding gradients before the read-out interval, is characterized in that the digitized, incomplete, complex spin-echo signal is completed for the entire read-out interval by adding zeros and the central symmetrical part is weighted with a function which is substantially anti-symmetrical about the point t&equals;t and has an amplitude of &frac12; at t , and is subsequently Fourier-transformed for producing a Fourier-transformed signal. This permits start of image reconstruction while subsequent image data is still being read.

Method of producing magnetic resonance images

A sample head for the NMR tomography is disclosed. The sample head has at least two hollow-cylindrical housings, arranged beside each other along a common axis. Each of the housings has an outer cylindrical wall consisting of essentially continuous, electrically conductive material and has an inner cylindrical wall surrounding a sample area. The inner cylindrical walls are provided with a plurality of parallel electrical conductors extending parallel to an axis of the sample head. The sample head, further, has a coupling device for generating rf electrical currents within the conductors.

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Ettlingen, Germany

Heinrich Lehr