General Electric Company

Ge Medical Systems Global Technology Company, LLC

Ge Hangwei Medical Systems Co., Ltd.

Jiaqin Dong

Shuqin Dong

Shuo Li

Ping Liu

Jiang Hsieh

Bin Wang

Jun Li

Yunfeng Sun

Meng Zhang

Shou Li

Jianying Li

Shuang Hong Wang

Ximiao Cao

Zhihui Sun

Jie Wu

Xianjun Pan

Yilun Shi

Jingyi Ren

Hai Feng Wu

Juan Zhong

Abhishek Rawat

A method for a CT scan of a body part, wherein a marker is positioned on the body part. The method comprises: positioning a marker on the body part; performing a scout scan of the area which contains the body part, to acquire a scout image; detecting the marker in the scout image to acquire position information of the marker; and using the position information to navigate the CT scan.

Method and apparatus for navigating CT scan with a marker

A medical scanning system and method for determining scanning parameters based on a scout image, the system includes: a scanned object description module for describing the shape of a scanned object on an initial image; an adjustment module for aligning the shape of the scanned object with the pre-stored average shape; a principal component analysis module for extracting the principal component for the aligned shape of the scanned object; a desired shape acquisition module for imparting weight parameters to said principal component, acquiring a plurality of new shapes, and from said plurality of new shapes, determining the new shape with the maximum cost function value as the desired shape and a scanning parameter setting module for setting scanning parameters based on the desired shape.

Medical scanning system and method for determining scanning parameters based on a scout image

A collimator for use in a CT system made of an X-ray absorbing material, the collimator comprises an imaging aperture having a first width for passage of a first X-ray beam, the first X-ray beam being used for X-ray imaging, and a tracking aperture having a second width for passage of a second X-ray beam, the second X-ray beam being used for X-ray beam tracking.

Collimator for use in a CT system

A method and apparatus for data conversion in an unequal &#x3b3; angle CT system. The method for imaging in a CT system having a flat module detector array includes obtaining fan beam projection data of an object from a CT scan, obtaining a geometric structure parameter of the flat module detector array; rebinning data from the fan beam projection data to parallel beam projection data based on the geometric structure parameter to convert the fan beam projection data into the parallel beam projection data, and generating a CT image from the parallel beam projection data.

Method and apparatus for data conversion in an unequal gamma angle CT system

The present invention provides a method and apparatus for reducing artifacts in Computed Tomography (CT) image reconstruction. The method comprises acquiring an original reconstructed image, then conducting total variation processing for the original reconstructed image generating a total variation reconstructed image, conducting an initial metal artifact reduction processing for the original reconstructed image generating an initial metal artifact reduction reconstructed image, generating a weighted image based on the total variation reconstructed image and the initial metal artifact reduction reconstructed image, wherein the weighted image reflects that the original reconstructed image contains white-band artifactsd combining a portion of the original reconstructed image and a portion of the initial metal artifact reduction reconstructed image through the weighted image to generate a final image, wherein the final image does not contain white-band artifact.

Method and apparatus for reducing artifacts in computed tomography (CT) image reconstruction

A method and apparatus for metal artifact elimination in a medical image. The method includes: obtaining a medical image to be processed; determining whether or not a metal region is contained in the medial image; and performing artifact elimination processing to the medical image when metal regions are contained in the medical image and a metal density value of one of the metal regions is greater than or equal to a preset density value.

Method and apparatus for metal artifact elimination in a medical image

The present invention provides a method and apparatus for reducing artifacts in CT image reconstruction. The method comprises obtaining an original reconstructed image and an original sinogram and determining a proportion of metal pixels in the original reconstructed image. If the proportion is greater than a first threshold value, then generating an expanded metal template based on the original reconstructed image, generating a metal-free, metal artifact reduced (MAR) image based on the expanded metal template and the original sinogram, and generating a final image based on the expanded metal template and the metal-free, MAR image. However, if the proportion of metal pixels is less than a second threshold value, then generating an expanded metal template based on the original reconstructed image, generating a metal-free, metal artifact reduced image based on a treatment, and generating a final image based on the expanded metal template and the metal-free, MAR image.

Method and apparatus for reducing artifacts in computed tomography image reconstruction

A method for geometric calibration of a CT scanner, including, for each row of at least one row of detector cells, establishing a complete geometric description of the CT scanner, including at least one unknown geometric parameter, establishing a description of a forward projection function using the complete geometric description, acquiring actual projection coordinates of a calibration phantom placed in a scanning field of view (SFOV) on a current row of detector cells and corresponding to a plurality of angles, acquiring calculated projection coordinates of the calibration phantom on the current row of detector cells and corresponding to the plurality of angles using the description of the forward projection function, and acquiring a calibrated value for the at least one unknown geometric parameter by evaluating the at least one unknown geometric parameter based on the acquired actual projection coordinates and calculated projection coordinates via a nonlinear least square fitting algorithm.

Geometry calibration algorithm for large flat module detector CT scanner

A method and system for automatically determining a localizer in a scout image. The method comprises obtaining a 3D model best matched to an object to be scanned and projecting a localizer in the best matched 3D model onto a scout image of the object to be scanned to obtain an optimal localizer. The system comprises an obtaining device for obtaining a 3D model best matched to an object to be scanned and a determining device for projecting a localizer in the best matched 3D model onto a scout image of the object to be scanned to obtain an optimal localizer.

Method and system for automatically determining a localizer in a scout image

A method for sorting CT image slices comprising, if no image slice comprises a target respiratory phase at a couch position, determining a target breathing feature value corresponding to the target respiratory phase based on a respiratory motion curve of a scanned patient, searching from a plurality of image slices at the couch position for one or more image slices comprising a breathing feature value close to the target breathing feature value to serve as candidate image slices, and selecting, based on a breathing feature value difference between the breathing feature value of each of the candidate image slices and the target breathing feature value and/or an image difference between each of the candidate image slices and at least one reference image slice, a single image slice from the candidate image slices for constructing the 3D CT image for the target respiratory phase.

Method for sorting CT image slices and method for constructing 3D CT image

A method for image reconstruction using projection data obtained by an asymmetric detector includes dividing the projection data into Regions, and. Regionis an asymmetric region having detecting channels but no detecting channels symmetrical about a central channel. Regionis a transition region having detecting channels and there are detecting channels symmetrical about the central channel. Regionis a symmetric region having detecting channels and there are detecting channels symmetrical about the central channel. Regionis a transition region having detecting channels and there are detecting channels symmetrical about the central channel. Regionis a truncated region where there is no detecting channel. The method includes performing a view angle weighting on projection data in each of the five regions, and reconstructing a tomographic image of an irradiated subject from the weighted projection data.

Apparatus and method for image reconstruction and CT system

A calibration device for location of a CT X-ray generator and detector includes a splitting window, a splitting window bracket configured to support the splitting window, an integral bracket, and a spring including a first end connected to the splitting window bracket and a second end connected to the integral bracket.

Calibration device for location of CT x-ray generator and detector, calibration method using the calibration device, and calibration method for CT system

An X-ray detector includes a single-layered semiconductor substrate having an array of detection cells which directly convert photons of X-rays into electrical signals; a first data collecting device which collects data with respect to the array of detection cells in a photon counting mode; and a second data collecting device which collects data with respect to the array of detection cells in a current measuring mode.

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Beijing, China

Jiaqin Dong