Dynamic reconstruction and rendering of 3d tomosynthesis images

RELATED APPLICATIONS AND CLAIM OF PRIORITY

Each of these conventional reconstruction techniques has inherent drawbacks, e. The third method includes the steps of loading said set of projection images into memory, selecting a region of interest, applying any necessary preprocessing, selecting a reconstruction method reconstructing an image according to said reconstruction method to produce a 3D tomographic image focusing on said region of interest, performing any post reconstruction processing on the 3D tomographic image, and rendering said 3D tomographic image on a display.

Once Dynamic reconstruction and rendering of 3d tomosynthesis images, the process proceeds to step whereby a user e. The ROI for reconstruction and display is defined by the image area specified in the pan setting, the magnification level specified in the zoom setting and the position of the plane of reconstruction specified in the depth setting.

The present invention is 1 an optimized dynamic reconstruction and rendering algorithm for tomographic image reconstruction on-demand, 2 an optimized and dynamic image reconstruction method incorporating a backprojection and filtering BPF algorithm in which a reconstructed image is filtered after backprojection, and 3 an optimized method for tomographic image reconstruction using a graphics processing unit GPU.

There are many embodiments of the backprojector which may contain both mathematical and logic operations. Under this assumption, a single angle is used to normalize the projection data from a single source position.

Different backprojectors are developed for a variety of purposes including reducing image artifacts, enhancing elements in the image, decreasing reconstruction time, etc.

Additionally, technologists may check image quality by verifying the contributions of each projection image to the reconstruction image.

The method of claim 4, wherein changes to the ROI results in a reconstruction of the 3D tomographic image, providing a high-quality magnification of the 3D tomographic image.

There are many embodiments of the backprojector which may contain both mathematical and logic operations. The method allows for preprocessing of the projection images and reconstruction of the projection images using a backprojecting and filtering BPF method in which the projection images are backprojected into a 3D tomographic image and then filtered to enhance specific structures in the resultant 3D tomographic image.

A digital tomosynthesis system includes one or more x-ray sources and one or more one-dimensional 1D or 2D x-ray digital detectors.

RELATED APPLICATIONS AND CLAIM OF PRIORITY

In this example, detector D rotates as the x-ray focus F1 moves through a limited range of angles. Similarly, although a preferred ordering of these preprocessing steps is given, these steps may be conducted in any order. Weightings may be used to mask defect areas and to apodize the data.

First, it is possible to reconstruct the image to a new field-of-view. Following the post-processing in stepthe image is rendered and displayed at step As with other alterations to conventional reconstructions, this action requires that the raw data be available and that the images be reprocessed again off-line.

Dynamic Reconstruction and Rendering of 3D Tomosynthesis Images

In Digital Tomosynthesis, a 3D tomographic image of an object is reconstructed from a limited set of 2D radiographic projection images.

In this approach, the image reconstruction and rendering are intimately interlinked. The number of pixels in the image is typically determined as a tradeoff between the stored image file size, the type and nature of the image acquisition, and the noise in the acquired data.

Altering the ROI by changing the pan, zoom or depth results in the image being newly reconstructed. Also, the spacing and location of the x-ray foci F can be arbitrary. Single-pass reconstruction techniques used in tomosynthesis do not generally require a reconstruction of the full 3D image dataset and may thus be computationally efficient.

Prior art methods are essentially off-line approaches in which images are processed, saved and then reviewed at a later time.

Neutron radiography and computed tomography CT provide valuable information about the post-irradiation condition of the fuel specimen.

Under this assumption, a single angle is used to normalize the projection data from a single source position. During the preprocessing stepone or more of the following steps may be performed: A method of dynamically reconstructing 3D tomographic images from a set of projection images, the method comprising: At each location Fia projection image of the acquired anatomy in this case, the breast is made onto the detector to produce an image Di.

As the filtering in BFP is performed after backprojection, no artifacts are introduced into the source projection data. The level of detail in the image is determined by the size of the region of the computer screen used to display the image in pixelsand the size of the ROI as measured physically in the anatomy in units of length.Dynamic reconstruction and rendering of 3D tomosynthesis images By leveraging the computational efficiency gains afforded by off-the-shelf GPU hardware, tomosynthesis reconstruction can be performed on demand at real-time, user-interactive frame rates.

Jul 31,  · A method of dynamically reconstructing three dimensional (3D) tomographic images from a set of projection images is disclosed. The method includes the steps of loading a set of projection images into a memory device, determining a reconstruction method for the set of projection images, reconstructing a 3D tomographic image from the set of projection images.

A method of dynamically reconstructing three dimensional (3D) tomographic images from a set of projection images is disclosed. The method includes the steps of loading a set of projection images into a memory device, determining a reconstruction method for the set of projection images, reconstructing a 3D tomographic image from the set of projection images.

Prior art keywords image set projection images tomographic image reconstruction Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. A method of dynamically reconstructing three dimensional (3D) tomographic images from a set of projection images is disclosed.

The method includes the steps of loading a set of projection images into a memory device, determining a reconstruction method for the set of projection images, reconstructing a 3D tomographic image from the set of projection images to be displayed to a user; and.

Abstract Dynamic Reconstruction and Rendering (DRR) is a fast and flexible tomosynthesis image reconstruction and display implementation.

By leveraging the computational efficiency gains afforded by off-the-shelf GPU hardware, tomosynthesis reconstruction can be performed on demand at real-time, user-interactive frame rates.

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Dynamic reconstruction and rendering of 3d tomosynthesis images
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