Three dimensional matching method for lung CT

A three-dimensional registration, lung technology, applied in the processing of 3D images, image data processing, instruments, etc., can solve the problems of inability to provide corresponding results, low functional accuracy, etc., and achieve the effect of improving diagnostic efficiency and accurate registration.

Inactive Publication Date: 2014-09-03
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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Problems solved by technology

[0005] In some PACS (Picture Archiving and Communication Systems) systems, although the function of automatically locating similar tomographic images is provided, the accuracy of this function is not high, and it only performs matching between faults. Multiple nodules, this method does not provide valid corresponding results

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  • Three dimensional matching method for lung CT
  • Three dimensional matching method for lung CT
  • Three dimensional matching method for lung CT

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[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. These more detailed descriptions are intended to aid in understanding the invention and should not be used to limit the invention. From this disclosure it will be apparent to those skilled in the art that the present invention may be practiced without some or all of these specific details. In other instances, well-known operating procedures have not been described in detail in order to avoid diluting the invention.

[0028] like figure 1 As shown, the three-dimensional registration method of lung CT includes the following steps:

[0029] Step S1, loading the first lung CT volume data and the second lung CT volume data. The first lung CT volume data and the second lung CT volume data are the lung CT volume data of the same subject at different times or under different detection conditions.

[0030] Step S2, using mutual information as the registration ...

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Abstract

The invention relates to a three dimensional matching method for lung CT. The three dimensional matching method comprises steps that: first lung CT body data and second lung CT body data are loaded, mutual information is taken as matching measure, three dimensional rigid matching for the first lung CT body data and the second lung CT body data is carried out to make lung portion areas of the two are aligned integrally, displacement parameters and rotating parameters in three directions of X, Y and Z axes are recorded and are taken as first matching parameters; on the basis of rigid matching, non-rigid matching is carried out, the optimal displacement field of the non-rigid matching is recorded and is taken as the second matching parameter; the first matching parameters and the second matching parameter are utilized to carry out matching of nodules in the first lung CT body data and the second lung CT body data to establish corresponding relations. The three dimensional matching method can realize accurate matching, a nodule focus at the same position is enabled to automatically correspond to imaging positions in different CT data by utilizing the matching result, and thereby the method is convenient for a doctor to contrast nodule disease development conditions.

Description

technical field [0001] The invention belongs to the technical field of computer vision and image processing, and in particular relates to a three-dimensional registration method of lung CT. Background technique [0002] According to WHO's 2008 global tumor epidemiological statistics (GLOBOCAN 2008), in 2008 alone, there were 12.7 million tumor cases worldwide and 7.6 million deaths [1]. Among them, all new tumor cases in China were 2.8 million, which was the number of new tumor cases in the United States. In the same year, the number of cancer deaths in China was 1.96 million, while the number of deaths in the United States was 570,000, with a gap of 3.4 times. Malignant tumors account for more than 20% of the causes of death in our country. According to Bernard Stewart, head of the WHO International Council on Cancer Research, by 2020, the global cancer incidence will increase by 50%. [0003] The key to improving the five-year survival rate of cancer patients lies in how...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T15/00A61B6/03
Inventor 袁克虹于川汇
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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