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Method and system for image standardization

An image and algorithm technology, applied in the field of image standardization and systems, can solve problems such as uneven BAC intensity values ​​and difficult to define models

Pending Publication Date: 2022-06-21
VOLPARA HEALTH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This topological complexity yields a variety of patterns, and this diversity makes it difficult to define the models used to describe BACs
[0009] In addition, BACs have uneven intensity values ​​and sometimes resemble healthy breast tissue in appearance

Method used

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  • Method and system for image standardization

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Embodiment Construction

[0047] In an embodiment, the method and system for differentiating and segmenting BAC from mammograms includes three steps as given below.

[0048] 1) contrast enhancement , is used to improve the visibility of breast tissue components, whereby breast regions are segmented, and a contrast stretching algorithm is applied to the segmented regions. The algorithm maps pixel values ​​in the breast region to new values ​​such that a portion of the data is saturated at low and high intensities of the input data.

[0049] 2) perform a local "max" transformation , whereby the 2-dimensional first filter is designed to extract the maximum pixel value from the region of interest (ROI). An image of m rows and n columns can be divided into m×n overlapping ROIs, where each ROI is centered at a pixel location (m,n). Therefore, the first filter converts the image into another representation that does not change the size of the image. Applying the first filter to the enhanced original mam...

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Abstract

The present invention relates to a method and system for transforming an original mammogram into a standardized representation, where pixel values are independent of imaging conditions. The performed method comprises: contrast enhancement for improving the visibility of breast tissue components, whereby regions of the breast are segmented and a contrast stretching algorithm is applied to the segmented regions to preferably create an enhanced original image or mammogram; performing a local maximum transform whereby the two-dimensional first filter is designed to extract maximum pixel values from a region of interest (ROI) to preferably create a local maximum mapping image or mapping; a ratio map is derived, whereby the pixel value of the ratio map is a measure of the relative response of the pixel with respect to its local maximum, thereby capturing differences between breast components regardless of mammogram changes.

Description

technical field [0001] The present invention relates to methods and systems for transforming raw mammograms into a normalized representation in which pixel values ​​are independent of imaging conditions. Background technique [0002] Mammography is a diagnostic and screening process in which X-rays are used to examine the breasts, mainly for breast cancer detection, mammography can also identify other conditions such as chronic kidney disease, decreased bone mineral density, Abnormalities associated with diabetes, metabolic syndrome, hypertension, coronary artery disease, and stroke. [0003] Breast screening requires obtaining two views of each breast, ie, four mammograms per patient. More recently, to improve diagnosis, a series of two-dimensional (2D) projections have been captured and used to reconstruct three-dimensional (3D) images, known as tomosynthesis or 3D mammography. [0004] Digital mammography generally involves two types of images: "raw" images and "process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06T5/20G06T7/11G06T7/136
CPCG06T5/20G06T7/11G06T7/136G06T2207/10116G06T2207/30068G06T5/94G06T7/0012G06T2207/10112G06T5/77
Inventor R·海纳姆王恺尔
Owner VOLPARA HEALTH TECH
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