Image feature repeatability measurement method and apparatus
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A measurement method and repeatability technology, applied in the field of medical imaging, can solve the problems of low accuracy and achieve the effect of improving accuracy
Active Publication Date: 2017-05-31
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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[0004] In view of this, the embodiments of the present invention provide a method and device for measuring the repeatability of image features, aiming to solve the problem of relatively low accuracy in the prior art that usually only uses a single factor value to evaluate the repeatability of image features
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Embodiment 1
[0026] figure 1 The implementation flow of the repeatability measurement method for image features provided by Embodiment 1 of the present invention is shown, and the implementation flow is described in detail as follows:
[0027] Step S101, acquiring a plurality of images, and performing preprocessing on the plurality of images.
[0028] In the embodiment of the present invention, the multiple images may be from computer tomography (Computed Tomography, CT), magnetic resonance scanning (Magnetic Resonance Imaging, MRI), positron emission tomography (Positron Emission Tomography, PET), etc. A medical image of a set of sample objects. Medical images represent the pathological or anatomical information of various tissues through different levels of grayscale display, and the analysis of the grayscale differences of diseased tissues can guide research. Grayscale information usually contains two types of differences: the difference caused by the influence of imaging factors (suc...
Embodiment 2
[0068] image 3 A schematic diagram of the composition of the image feature repeatability measurement device provided by Embodiment 2 of the present invention is shown. For the convenience of description, only the parts related to the embodiment of the present invention are shown, and the details are as follows:
[0069] The devices include:
[0070] An image acquisition module 31, configured to acquire multiple images and perform preprocessing on the multiple images;
[0071] An area acquiring module 32, configured to acquire an area satisfying a preset condition in each of the preprocessed images, and mark the area in each of the images;
[0072] A normalization processing module 33, configured to perform standardization processing on each image, so that the gray value of each pixel in each image is within a preset gray value area;
[0073] The factor value acquisition module 34 is used to extract the image features of the marked area, and acquire a plurality of factor val...
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Abstract
The invention belongs to the technical field of medical images and provides an image feature repeatability measurement method and apparatus. The method comprises the steps of obtaining a plurality of images and preprocessing the images; obtaining a region meeting a preset condition in each of the preprocessed images, and marking the region in each image; performing standardization processing on each image to enable a grayscale value of each pixel in each image to be located in a preset grayscale value region; extracting an image feature of the marked region, and obtaining a plurality of factor values related to the image feature; calculating an overall consistency correlation coefficient (OCCC) value of the image feature according to the factor values; and if the OCCC value is greater than a predetermined threshold, determining that the image has repeatability. Through the method and the apparatus, the problem of relatively low accuracy due to the fact that a single factor value is generally adopted for assessing the repeatability of the image feature in the prior art can be solved.
Description
technical field [0001] The invention belongs to the technical field of medical imaging, in particular to a repeatable measurement method and device for image features. Background technique [0002] Radiomics is a rapidly emerging field, which can extract a large number of high-dimensional quantitative image features from standard medical images with high throughput, and build models by combining reproducible image features and clinicopathological features. Diagnosis, prediction, and preoperative decision-making have important clinical value and application prospects. However, in the prior art, only a single factor value is usually used to evaluate the repeatability of image features, and the accuracy rate is relatively low. [0003] Therefore, it is necessary to propose a new technical solution to solve the above technical problems. Contents of the invention [0004] In view of this, the embodiments of the present invention provide a method and device for measuring the r...
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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/54G06F19/00
CPCG06F19/321G16H50/20G06V10/20
Inventor 王梦巧李志成李其花孙秋畅宋柏霖
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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