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Correction method and device for sawtooth artifacts in digital breast mammary tomographic reconstruction

A correction method and mammary gland technology, which is applied to radiological diagnostic instruments, diagnosis, image data processing, etc., can solve problems such as different causes, achieve the effect of removing aliasing artifacts and improving quality

Active Publication Date: 2015-11-25
SHANGHAI UNITED IMAGING HEALTHCARE
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Problems solved by technology

However, due to the many types of artifacts and their different causes, it is difficult to find, identify and remove them.

Method used

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  • Correction method and device for sawtooth artifacts in digital breast mammary tomographic reconstruction
  • Correction method and device for sawtooth artifacts in digital breast mammary tomographic reconstruction
  • Correction method and device for sawtooth artifacts in digital breast mammary tomographic reconstruction

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[0023] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0024] In the following description, many specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways than those described here, so the present invention is not limited by the specific embodiments disclosed below.

[0025] Projected images of the breast are captured by rotating the rotating arm to different angles in a digital breast tomography device. The generation of three-dimensional breast images needs to obtain projection images at various angles, and use these projection images at different angles to reconstruct a tomographic image of the breast. A 3D image of breast includes many reconstruction layers, and each reconstruction layer correspond...

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Abstract

The invention provides a correction method and a correction device for sawtooth artifacts in digital breast mammary tomographic reconstruction. The method comprises the following steps: calculating the mapping positions of the edges of a detector in reconstruction images of corresponding reconstruction layers in projected images in various angles; determining the intersection points of the edges of the mammary image region and the mapping positions and the position information of the intersection points in the reconstruction images of the reconstruction layers; and based on the intersection points and malposition information corresponding to the intersection points, removing the sawtooth artifacts of the edges of the detector in the mapping position of the reconstruction images in the projected images in various angles in the mammary image region, wherein the malposition information corresponding to the intersection points refers to the shift of the sharp end of the sawtooth artifacts corresponding to the intersection points relative to the intersection points in the horizontal direction.

Description

technical field [0001] The invention mainly relates to digital mammography technology, in particular to a method and device for correcting jagged artifacts in digital mammary tomographic reconstruction. Background technique [0002] Breast cancer is an important disease that seriously threatens women's health worldwide. Mammography is currently recognized as the preferred screening modality for breast cancer. In recent years, with the continuous update of imaging equipment, the emergence of digital breast tomosynthesis technology, also known as digital breast tomosynthesis (Digital Breast Tomosynthesis, DBT), has further improved the early detection and diagnosis of breast cancer. [0003] Digital breast tomography is a three-dimensional imaging technique that obtains projected images of the breast at different angles during a short scan. These independent projection images are then reconstructed into a series of high-resolution tomographic images, which are displayed indi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/00G06T7/00
Inventor 杨乐周海华冯娟崔凯齐季
Owner SHANGHAI UNITED IMAGING HEALTHCARE
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