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MR-PET cyclic motion gating and correction

  • US 9,535,145 B2
  • Filed: 10/29/2008
  • Issued: 01/03/2017
  • Est. Priority Date: 11/09/2007
  • Status: Active Grant
First Claim
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1. An imaging system, including:

  • a magnetic resonance (MR) scanner that scans a region of interest in a subject to generate image data of the region of interest during a physiological cycle;

    a processor that divides the physiological cycle into a plurality of frames, associates the MR image data to corresponding frames in the physiological cycle, and reconstructs a series of MR images to generate a motion model of the region of interest during the physiological cycle;

    a positron emission tomography (PET) scanner that collects PET data from the region of interest during the frames of the physiological cycle;

    a PET reconstruction processor that uses the motion model to generate a PET image in one or more reference frames of the physiological cycle; and

    a vital signs monitor (VSM) that monitors the physiological cycle in the subject as the MR scanner scans the region of interest;

    wherein the processor analyzes the motion model to determine an amount of detected motion in each frame of the cyclic physiological signal, identifies a frame in which a smallest amount of motion occurred during the MR scan, and gates the PET scanner to collect data during the identified frame.

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