Method and device for calculating a cardiothoracic ratio

Abstract

The invention relates to the technical field of image processing, in particular to a method and device for calculating the cardiothoracic ratio of a chest medical image. The method comprises the following steps: inputting a chest medical image; obtaining a left lung bounding box, a right lung bounding box and a bounding box of the heart area; extracting a left lung region-of-interest, a right lungregion-of-interest and a heart region-of-interest in the bounding box; determining a minimum bounding box of the lung region of interest according to the left lung region of interest and the right lung region of interest; determining the long axis direction and the transverse axis direction of the human body according to the minimum bounding box of the lung region of interest; Determining a minimum bounding box of the region of interest of the heart; Calculating the ratio of the transverse diameter length of the minimum bounding box of the heart region to the transverse diameter length of theminimum bounding box of the lung, and calculating the ratio of the area of the heart region of interest to the area of the lung region of interest. According to the technical scheme, related tissuescan be accurately segmented, and the cardiothoracic ratio and the cardiothoracic area ratio can be automatically calculated.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to a method and device for calculating cardiothoracic ratio. Background technique [0002] Medical imaging is an advanced technology to understand the health status of human organs. Imaging equipment such as X-ray equipment, DR equipment, CT equipment, and MR equipment have been widely used in clinical diagnosis to help doctors observe and understand the anatomical structure and Lesion anatomical structure location information, etc. [0003] In clinical practice, chest imaging is often used to evaluate diseases of the heart and lungs. The center-thoracic ratio and cardiothoracic area ratio are important diagnostic quantitative indicators for clinical radiologists to judge cardiac hypertrophy. The cardiothoracic ratio is defined as the largest transverse diameter of the heart and lung The ratio of the maximum transverse diameter of the part. The cardiothoracic area...

AI Technical Summary

Problems solved by technology

The marking and delineation process is easily affected by the implementer's clinical experience and other subjective factors, and the operation is cumbersome, resulting in low work efficiency for clinicians

[0005] Existing techniques for calculating the cardiothoracic ratio using image processing technology are mainly based on the grayscale information of the image for heart and lung region segmentation or region edge extraction to calculate the cardiothoracic ratio, such as the threshold value of the lung and heart region based on OTSU Segmentation and boundary extraction, this type of method relies heavily on the selection and calculation of the gray threshold, and the segmentation results are easily interfered by other adjacent tissues

Due to the large differences in the noise of imaging equipment from different manufacturers, and the differences in imaging quality and definition, these will directly affect the stability and accuracy of calculation results

[0006] The above calculation method of heart-to-chest ratio cannot meet the requirements of high precision, high stability, adaptability to imaging equipment of different manufacturers and automatic

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