Bruker Biospin Mri Gmbh

Michael Heidenreich

Rainer Pietig

Volker Niemann

Jochen Franke

Arno Nauerth

Techniques for determining motion states of at least two bodies by an MR-device are provided, wherein the bodies each have a respective target region which is in an anatomic motion comprising a repetitive motion pattern with a motion repetition rate, and in particular, for cardiac and/or respiratory motion. A sequence of individual MR-measurements are performed on the bodies at a MR-repetition rate higher than the motion-repetition rate, wherein nuclear spins of the at least two bodies are excited during the sequence of individual MR-measurements either simultaneously or alternately at navigator times. With the individual MR-measurements, navigator signals are determined, each respective navigator signal indicative of the motion state of at least one of the motion patterns at the navigator time of the navigator signal. These techniques allow simultaneously determining motion states for imaging more than one body with a repetitive motion pattern with reduced preparation time.

Method for determining motion states of at least two bodies and method for simultaneously imaging at least two bodies

A device for alternating examination of a measurement object () by means of MPI and MRI with two magnetic field-generating elements is presented. The device is characterized by a main magnet coil system with two coaxial partial coil systems () arranged mirror-symmetrically relative to a central plane running perpendicularly to the z-axis through the first volume under investigation (). The volumes under investigation are superimposed. A polarity reversal device () reverses the polarity of the current through a partial coil system and the main magnet coil system generates a homogeneous magnetic field of at least sixth order in the first volume under investigation when the partial coil systems have identical polarity, and a spatially strongly varying magnetic field profile in the second volume under investigation when the polarities are opposite. Repositioning of the measurement object is thereby simplified or can even be eliminated.

Device for sequential examination of a measurement object by means of MPI and MRI methods

Device for alternating examination of a measurement object () by means of MPI and MRI within a magnetic system is characterized in that the magnetic system has a specified magnetic field profile, which is not temporally variable during the alternating examination, and both magnetic field generating elements () generate a magnetic field portion, in the first examination region () and in the second examination region (), which is essential for the MRI operation and for the MPI operation, and in that there is a transport apparatus () by means of which the measurement object can be moved out of the first examination region and into the second examination region and/or vice versa. The total space requirement for both modalities is thus reduced and the complexity of an integrally designed hybrid system is minimized.

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Karlsruhe, Germany

Michael Heidenreich