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US 7,359,535 B2Granted
Systems and methods for retrospective internal gating
AssigneeGE Medical Systems Global Technology Company, LLC
InventorsPrathyusha K. Salla, Gopal B. Avinash, Saad Ahmed Sirohey, Tin-Su Pan
Life of this patent
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Abstract
A method for retrospective internal gating is described. The method includes acquiring images at multiple z-locations z1 . . . zn and at different times t1 . . . tn at each of the z-locations, and reordering the images at least one of the z-locations to obtain a synchronized image set.
Claims25
A method for retrospective internal gating comprising:
- acquiring images at multiple z-locations z1 . . . zn and at different times t1 . . . tn at each of the z-locations to obtain a plurality of acquired image sets, each acquired image set including only the images acquired at a single one of the z-locations;
- designating one of the images in a temporal sequence t1 . . . tn at one of the z-locations as a reference image;
- determine a closest image in which motion of an organ is minimal with respect to a position of the organ in the reference image, the closest image being an image in the temporal sequence t1 . . . tn at a z-location adjacent the z-location of the reference image;
- and
- reordering the images within at least one of the acquired image sets to obtain at least one synchronized image set that includes at least two images that appear to have been acquired contemporaneously, each synchronized image set including only the images acquired at a single one of the z-locations.
2 more elements
A computer-readable medium encoded with a program configured to:
- acquire images at multiple z-locations z1 . . . zn and at different times t1 . . . tn at each of the z-locations to obtain a plurality of acquired image sets, each acquired image set including only the images acquired at a single one of the z-locations;
- extract motion information from the images by using temporal data acquired at different times t1 . . . tn at each of the z-locations and using a mean intensity value of at least a portion of one of the images;
- designate one of the images in a temporal sequence t1 . . .tn at one of the z-locations as a reference image;
- determine a closest image in which motion of an organ is minimal with respect to a position of the organ in the reference image, the closest image being an image in the temporal sequence t1 . . . tn at a z-location adjacent the z-location of the reference image;
- and
- reorder the images within at least one of the acquired image sets to obtain at least one synchronized image set, each synchronized image set including only the images acquired at a single one of the z-locations.
3 more elements
A computer configured to:
- acquire images at multiple z-locations z1 . . . zn and at different times t1 . . . tn at each of the z-locations to obtain a plurality of acquired image sets, each acquired image set including only the images acquired at a single one of the z-locations;
- designate one of the images in a temporal sequence t1 . . . tn at one of the z-locations as a reference image;
- determine a closest image in which motion of an organ is minimal with respect to a position of the organ in the reference image, the closest image being an image in the temporal sequence t1 . . . tn at a z-location adjacent the z-location of the reference image;
- and
- reorder the images within at least one of the acquired image sets to obtain at least one synchronized image set, each synchronized image set including only the images acquired at a single one of the z-locations.
2 more elements
An imaging system comprising:
- a scanner configured to generate attenuation data by scanning an object;
- and a controller electrically coupled to the scanner, the controller configured to:
- acquire images at multiple z-locations z1 . . . zn and at different times t1 . . . tn at each of the z-locations to obtain a plurality of acquired image sets, each acquired image set including only the images acquired at a single one of the z-locations;
- designate one of the images in a temporal sequence t1 . . .tn at one of the z-locations as a reference image;
- determine a closest image in which motion of an organ is minimal with respect to a position of the organ in the reference image, the closest image being an image in the temporal sequence t1 . . . tn at a z-location adjacent the z-location of the reference image;
- and
- reorder the images within at least one of the acquired image sets to obtain at least one synchronized image set that includes at least two images that appear to have been acquired contemporaneously, each synchronized image set including only the images acquired at a single one of the z-locations.
4 more elements
A computed tomography (CT) imaging system comprising:
- a radiation source;
- a radiation detector;
- and
- a computer electrically coupled to the source and the detector, the computer configured to:
- acquire CT images at multiple locations z1 . . . zn and at different times t1 . . . tn at each of the z-locations to obtain a plurality of acquired image sets, each acquired image set including only the CT images acquired at a single one of the z-locations;
- designate one of the images in a temporal sequence t1 . . . tn at one of the z-locations as a reference image;
- determine a closest image in which motion of an organ is minimal with respect to a position of the organ in the reference image, the closest image being an image in the temporal sequence t1 . . . tn at a z-location adjacent the z-location of the reference image;
- and
- reorder the CT images within at least one of the acquired image sets to obtain at least one synchronized image set that includes at least two images that appear to have been acquired contemporaneously, each synchronized image set including only the CT images acquired at a single one of the z-locations.
6 more elements
Dependencies are inferred from the claim text.