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Method for estimating parameters of dual-energy subtraction and computer-readable storage medium

A parameter and number technology, which is applied to the estimation method of dual-energy subtraction parameters and the field of computer-readable storage media, can solve the problems of incomplete subtraction, cumbersome operation, affecting doctor's diagnosis, etc.

Active Publication Date: 2020-01-07
SHENZHEN ANGELL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the different body thicknesses of different patients, using the same set of parameters may result in incomplete subtraction, resulting in artifacts of bone tissue in pure soft tissue images, such as figure 1 As shown, affect the doctor's diagnosis
In addition, different subtraction parameters must be set for different parts, and the operation is more cumbersome.

Method used

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  • Method for estimating parameters of dual-energy subtraction and computer-readable storage medium
  • Method for estimating parameters of dual-energy subtraction and computer-readable storage medium
  • Method for estimating parameters of dual-energy subtraction and computer-readable storage medium

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Embodiment 1

[0073] Please refer to image 3 The first embodiment of the present invention is: a method for estimating dual-energy subtraction parameters, which can be applied to the diagnosis and treatment of lungs in medicine, including the following steps:

[0074] S1: Perform edge detection on the X-ray image to obtain the edge; further, since the contrast of bone tissue and soft tissue in the low-energy image is better than that of the high-energy image, the low-energy image is used to find the edge of the bone; the edge detection algorithm uses Canny edge detection, Canny algorithm The edges obtained are generally continuous curves, and the width of the curve is 1 pixel.

[0075] S2: Obtain a preset number of pixel points on both sides of each edge point on the edge, to obtain a soft tissue point set and a bone tissue point set corresponding to each edge point;

[0076] Further, the pixel points are acquired on the edge normal line where the edge point is located, and the number of pixels a...

Embodiment 2

[0106] This embodiment is a further expansion of the first embodiment. The similarities will not be repeated. The difference is that after step S5, before steps S6 and S10, the method further includes the step of filtering the edge points according to the soft tissue grayscale and the bone tissue grayscale.

[0107] If the extracted bone edges are mixed with too many non-bone edge points (such as the edges of muscles and blood vessels), the result may be estimated incorrectly. Therefore, for the edge points detected by the Canny algorithm, bone edges and non-bone edges can be used The neighborhood contrast changes differently during the subtraction process, and the bone edges are extracted.

[0108] Specifically, the absolute value of the difference between the gray level of the soft tissue and the gray level of the bone tissue corresponding to the same subtraction parameter of an edge point is calculated, and the gray contrast of the one edge point corresponding to the same subtra...

Embodiment 3

[0115] This embodiment is a computer-readable storage medium corresponding to the above-mentioned embodiment, on which a computer program is stored, and when the program is executed by a processor, the following steps are implemented:

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Abstract

The invention discloses a method for estimating dual-energy subtraction parameters and a computer-readable storage medium. The method includes: obtaining a preset number of pixel points on both sides of each edge point on the edge, and obtaining a corresponding number of pixels corresponding to each edge point. Soft tissue point set and bone tissue point set; according to the coordinates of the pixel points and different preset subtraction parameters, the third grayscale value corresponding to the different subtraction parameters of the pixel point is obtained; each edge point corresponding to each subtraction parameter is calculated separately The soft tissue grayscale and bone tissue grayscale; calculate the variance of the soft tissue grayscale corresponding to the same subtraction parameter at each edge point; use the subtraction parameter corresponding to the smallest soft tissue grayscale variance as the pure bone tissue image subtraction parameter; calculate respectively Each edge point corresponds to the difference between the soft tissue grayscale and the bone tissue grayscale of the same subtraction parameter; calculate the sum of the grayscale differences; use the smallest difference and the corresponding subtraction parameter as the pure soft tissue image subtraction parameter. The invention can quickly and accurately determine appropriate subtraction parameters.

Description

Technical field [0001] The present invention relates to the technical field of medical image processing, in particular to a method for estimating dual-energy subtraction parameters and a computer-readable storage medium. Background technique [0002] Because the lungs are covered by ribs, it is easy to miss the diagnosis of smaller lung lesions (such as nodules, etc.). In order to reduce the missed diagnosis rate, two methods of virtual dual-energy subtraction and real dual-energy subtraction are generally used to extract pure bone tissue images and pure soft tissue images. Virtual dual-energy subtraction only needs to be exposed once, and the rib occlusion can be removed using pattern recognition, but the calcification may be removed as a rib. [0003] Real dual-energy subtraction uses the X-ray absorption characteristics of different tissues at different KVs, and obtains low-energy images and high-energy images through two exposures of different KV (for example, 60KV and 120KV)....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00G06T7/13G06T7/136G06T5/00
CPCG06T7/0012G06T7/13G06T7/136G06T2207/30064G06T2207/20024G06T2207/10116G06T5/70
Inventor 荣繁壮孙凯叶超
Owner SHENZHEN ANGELL TECH
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