Dynamic reconstruction and rendering of 3d tomosynthesis images

The method of claim 1, wherein loading a set of projection images into a memory device further comprises loading each of the set of projection images into a graphic processing unit memory, wherein each of the set of projection images is stored as a texture object.

Pan is the ability to change the area of the image to be viewed. One reason may be to optimize the time it takes to reconstruct the images by rejecting data that is invalid and process only data that will contribute to a fully reconstructed image. In DRR, a 3D tomosynthesis or tomographic image is reconstructed in real-time and on-demand using the region of interest ROIthe parameters for reconstructing the image and the display settings selected by the user within an interactive graphical user interface GUI.

The projections interact constructively in regions that correspond to the structures in the original object. DRR will result in sharper images. One of the distinguishing features of DRR is the immediate responsiveness of the image reconstruction to altered parameters.

The projected vertices are then assembled into triangles in the screen space and sent to the rasterizer However, there are many factors that affect the spatial resolution of neutron CR that can be adjusted and possibly provide spatial resolution properties that exceed film radiography. Additionally, as the art of digital tomosynthesis and image processing advances, additional preprocessing steps may be added.

In DBT, typical reconstruction times vary from 5 to 30 minutes to reconstruct one 3D image dataset per breast. 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.

Next the process proceeds to step Filtering during post-processing can result in better image quality because all image data is preserved in the reconstructed image. In another general respect the embodiments disclose a third method of dynamically reconstructing 3D tomographic images from a set of projection images.

This necessitates a reconstruction algorithm that can reconstruct images at video refresh rates discussed in more detail below. Finally, for each fragment, a pixel is written to the frame buffer or back to texture memory When backprojected, the various images will add coherently in the tomosynthesis image of plane R to reconstruct the lesion.

Regardless of acquisition geometry used, after the projection images are acquired, they are reconstructed into a set of 3D tomographic images that are saved and then reviewed at a later time.

As a result, mammography superimposes normal tissues resulting in artifactual densities that often necessitate a biopsy; this leads to a loss in specificity.

The disadvantage of FBP is that if the radiologist needs to view the images reconstructed with different filters or other parameter changes to observe different clinical indications, all the images have to be reconstructed again. In Digital Tomosynthesis, a 3D tomographic image of an object is reconstructed from a limited set of 2D radiographic projection images.

In this example, detector D rotates as the x-ray focus Fi moves through a limited range of angles. DRR processes these commands and produces the results dynamically. Altering the ROI by changing the pan, zoom or depth results in the image being newly reconstructed.

Once the boundary of the breast is determined, the region outside the breast may be masked or a peripheral equalization may be applied to the breast data. Single pass reconstruction algorithms, such as FBP, are generally preferred as they are less computationally expensive and therefore faster.

The method of claim 29, wherein said reconstruction is performed by a graphics processing unit. During the preprocessing stepone or more of the following steps may be performed: The system includes a pre-collimator P to define the x-ray beam as it passes through the patient.

In this example, both the x-ray source F and a set of linear detectors Di move continuously along an axis. The method of claim 10, wherein the set of projection images are saved in the memory along with the 3D tomographic image such that a new 3D tomographic image can be constructed from the saved set of projection images.

Graphics objects are typically composed of polygon meshes, where additional surface detail can be modeled by mapping images or textures onto the polygons during the rendering phase.

RELATED APPLICATIONS AND CLAIM OF PRIORITY

Once the 3D tomographic image is reconstructed, it is immediately available for viewing by a user at step Tomographic x-ray breast imaging would obviate these limitations.

Note that prior art techniques for displaying images with zooming and panning do not result in improved image quality, rather the image is simply made larger or smaller; thus, the data encoded in the originally reconstructed images is unaltered.

RELATED APPLICATIONS AND CLAIM OF PRIORITY

DRR requires a different mindset with respect to tomographic images. Muhammad Abir This project seeks to assess the geometric stability of the U-Mo monolithic fuel system by evaluating the radiation-induced changes in the AFIP-7 experiment device.

In this example, the x-ray focus is moved continuously while a small number of discrete linear detectors produce a sequential set of linear images of the anatomy.

Here, each projection image is loaded into memory. 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.

Once a 3D image dataset is reconstructed, the images are saved at step Zoom is the ability to change the magnification level of the image that the user wants to view the image.

Also, the spacing and location of the x-ray foci F can be arbitrary. The result is that an object that is centered between the two reconstructed slices is blurred.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 to be displayed to a user;. 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.

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.

Dynamic Reconstruction and Rendering of 3D Tomosynthesis Images

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. 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.

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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