Patent ID: 7295007
Filing Date: 2007-11-13
Classification: A61B,G01R

Abstract:
1. An arrangement for reducing movement artifacts in images of an object obtained from spatially resolved magnetic resonance measurements, comprising: a magnetic resonance apparatus adapted for producing spatially resolved magnetic resonance measurement of a measurement object; a marker system comprising at least one source and at least one marker, wherein said marker system is adapted to emit from said at least one source at least one diverging electromagnetic ray bundle and to produce at least one diverging electromagnetic ray bundle by reflecting from said at least one marker electromagnetic rays produced by said at least one source, and wherein said marker system is adapted to be firmly connected to the measurement object; at least two spatially separated detector fields; at least one imaging system for imaging a portion of said at least one diverging electromagnetic ray bundle impinging the detector fields; a position determination device for calculating at least one of position and alignment of said marker system from signals of the detector fields; wherein said arrangement is also designed to determine position and alignment of said marker system from spatially resolved magnetic resonance measurement of said at least one marker; wherein said arrangement is also designed to determine a correlation between position and alignment of said marker system obtained from said signals of the detector fields and position and alignment of said marker system obtained from said spatially resolved magnetic resonance measurement of said at least one marker, thereby enabling a coordinate transformation of the position and alignment information from a coordinate system of the detector fields to a coordinate system of the in the magnetic resonance apparatus; a movement determination device for determining at least one of position and alignment of the measurement object from said at least one of position and alignment of said marker system; and a correction device for generating a movement correction signal for driving the magnetic resonance apparatus.