Method for quantitatively evaluating myocardial infarction on basis of nuclide image and CT (computed tomography) coronary angiography fusion

Abstract

The invention belongs to the field of medical image processing, and discloses a method and a system for quantitatively evaluating myocardial infarction on the basis of nuclide image and CT (computed tomography) coronary angiography fusion. The method includes acquiring heart PET (positron emission tomography) / CT and CTA (computed tomography angiography) data; carrying out three-dimensional DCT (discrete cosine transformation) frequency-domain interpolation on PET / CT images; acquiring heart regions in the PET / CT images and CTA images by the aid of multi-spectrum segmentation processes; acquiring left ventricular cardiac muscle regions in PET images by the aid of threshold processes; manually segmenting left ventricular cardiac muscle regions in the CTA images layer by layer; registering images; classifying pixel points according to the locations of pixel points on the registered images and tracer uptake values; inversely transforming infarction regions into original CTA spaces and dividing the volumes of left ventricular cardiac muscles from the volumes of the transformed infarction regions; three-dimensionally displaying fused images in volume rendering manners. The method and thesystem have the advantages that integral registration procedures can be fully automated, the method and the system are good in objectivity, intuitive results can be obtained, and analysis can be facilitated for clinical doctors.

Description

technical field [0001] The invention belongs to the field of medical image processing, and in particular relates to a quantitative evaluation method and evaluation system for myocardial infarction based on the fusion of nuclide images and CT coronary angiography. Background technique [0002] At present, the existing technology commonly used in the industry is as follows: Myocardial infarction is a kind of disease that causes myocardial necrosis due to coronary ischemia and hypoxia, and eventually leads to sudden death (acute) and myocardial remodeling (chronic), which seriously threatens human life and affects Quality of Life. Infarct size is a decisive factor for myocardial remodeling and cardiac dysfunction, and is an effective predictor of survival in patients with myocardial infarction. After myocardial infarction, the accurate positioning and quantification of the ischemic area will help clinically to effectively open the infarction-related coronary arteries and save ...

AI Technical Summary

Problems solved by technology

However, the scanning time of cardiac images of different modalities is different, the scanning equipment is different, the patient's heart rate, blood flow and other factors will cause the difference between the images of different modalities, and the non-rigid deformation of the heart makes different modalities The problem of cardiac image registration in the state becomes very complex

Images