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Patent Issued for Method and System for Retrospective Image Combination under Minimal Total Deformation Constrain for Free-Breathing Cardiac Magnetic...

February 24, 2014



Patent Issued for Method and System for Retrospective Image Combination under Minimal Total Deformation Constrain for Free-Breathing Cardiac Magnetic Resonance Imaging with Motion Correction

By a News Reporter-Staff News Editor at Cardiovascular Week -- A patent by the inventors Xue, Hui (Franklin Park, NJ); Shah, Saurabh (Evanston, IL); Guetter, Christoph (Lawrenceville, NJ); Jolly, Marie-Pierre (Hillsborough, NJ); Zuehlsdorff, Sven (Westmont, IL); Guehring, Jens (Erlangen, DE), filed on November 14, 2011, was published online on February 11, 2014, according to news reporting originating from Alexandria, Virginia, by NewsRx correspondents (see also Siemens Aktiengesellschaft).

Patent number 8649585 is assigned to Siemens Aktiengesellschaft (Munich, DE).

The following quote was obtained by the news editors from the background information supplied by the inventors: "The present invention relates to free-breathing cardiac magnetic resonance imaging, and more particularly, to image combination to perform retrospective noise suppression for free-breathing cardiac magnetic resonance imaging.

"Cardiac magnetic resonance (MR) is an important non-invasive modality for studying heart functions. However, the majority of cardiac studies rely on breath-held, segmented data acquisition, mainly due to the rapid and periodic beating of the human heart and limitations of imaging efficiency of conventional MR systems. Unfortunately, breath holding is often particularly difficult for patients with congestive heart disease of for uncooperative pediatric subjects. Accordingly, real-time cardiac imaging is of clinical interest. However, real-time imaging techniques, when compared to breath-held acquisitions, often compromise spatial/temporal resolution or sacrifice signal to noise ratio (SNR) to fit into a tight acquisition window, despite the broad use of parallel imaging and rapid imaging sequences."

In addition to the background information obtained for this patent, NewsRx journalists also obtained the inventors' summary information for this patent: "The present invention provides a method and system for retrospective image combination to improve signal to noise ratio (SNR) for free-breathing cardiac magnetic resonance imaging (MRI) with motion correction. Embodiments of the present invention calculate weights for every pixel in a set of images after motion correction. In embodiments of the present invention, the quality of the motion correction influences the output pixel values by minimizing the total amount of non-rigid deformation brought into the image combination. The optimal weights calculation can be formulated as an energy minimization problem and solve efficiently under a variational framework.

"In one embodiment of the present invention, an MR image acquisition comprising a plurality of frames is received. A key frame of the plurality of frames is selected. A deformation field is generated for each of the plurality of frames to register each of the plurality of frames with the key frame. A weight is determined for each pixel in each of the plurality of frames based on the deformation field for each frame. A combination image is then generated as a weighted average of the plurality of frames using the weight determined for each pixel in each frame.

"These and other advantages of the invention will be apparent to those of ordinary skill in the art by reference to the following detailed description and the accompanying drawings."

URL and more information on this patent, see: Xue, Hui; Shah, Saurabh; Guetter, Christoph; Jolly, Marie-Pierre; Zuehlsdorff, Sven; Guehring, Jens. Method and System for Retrospective Image Combination under Minimal Total Deformation Constrain for Free-Breathing Cardiac Magnetic Resonance Imaging with Motion Correction. U.S. Patent Number 8649585, filed November 14, 2011, and published online on February 11, 2014. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=31&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1513&f=G&l=50&co1=AND&d=PTXT&s1=20140211.PD.&OS=ISD/20140211&RS=ISD/20140211

Keywords for this news article include: Cardiology, Magnetic Resonance, Siemens Aktiengesellschaft.

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Source: Cardiovascular Week


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