Abstract
This study aimed to explore the effect of diffusion tensor imaging (DTI) image registration algorithm in the evaluation of ventricular remodeling in patients with myocardial infarction and the therapeutic effect of cross-theoretical model rehabilitation exercise care. The dynamic balance coefficient k was introduced to construct the DTI image registration algorithm k-AD based on the variable parameter AD algorithm. Then, it was compared with demons algorithm and AD algorithm and was applied in 110 patients with acute myocardial infarction. All patients were divided into the 55 cases of experimental group (cross-theoretical model rehabilitation exercise nursing) and 55 cases of control group (routine nursing). The myocardial tissue was labelled as infarction zone (IZ), infarction border zone (IBZ), and noninfarcted zone (NIZ). Finally, the fractional anisotropy (FA) and mean diffusivity (MD) were calculated. The results showed that the mean square error (MSE) of k-AD algorithm reduced to 0 after 35 iterations. The descent speed was obviously faster than AD and demons algorithms. The overlap of eigenvalue-eigenvector pairs (OVL-EEP) value of k-AD algorithm (0.25) was smaller than demons (0.81) and AD algorithms (0.56) (P<0.05). The FA value in IZ was notably smaller than IBZ and NIZ, while the MD value was greater than those (P<0.05). After nursing intervention, the FA value of myocardial infarction area in the experimental group was notably higher in contrast to control group, but the MD value was notably lower in contrast to it (P<0.05). In short, the DTI image registration algorithm k-AD based on the variable parameter AD algorithm was remarkably better than the demons and AD algorithms in convergence and DTI image registration. FA and MD values obtained by DTI registration image based on k-AD algorithm could clearly indicate the ventricular remodeling after myocardial infarction and the rehabilitation effect of cross-theoretical model rehabilitation exercise nursing intervention.
Highlights
Myocardial infarction refers to ischemic necrosis of the myocardium; the blood flow of the coronary arteries is drastically reduced or interrupted after the occurrence of coronary artery disease
Sample Source. 110 patients with acute myocardial infarction who were admitted to the hospital from October 2018 to February 2020 were selected as the research objects, and they were divided into the experimental group and the control group based on different postoperative nursing. e research had been approved by the Medical Ethics Committee of Hospital, and the patients had signed the informed consent form
Due to the complexity and high order of tensor data, diffusion tensor imaging (DTI) image registration is much more difficult than traditional medical image registration. erefore, it is crucial to select an appropriate image registration algorithm [13]. e DTI image registration algorithm (k-AD) based on the variable parameter AD algorithm was constructed by introducing the dynamic balance coefficient k. en, it was compared with the demons algorithm and the AD algorithm. e results showed that the mean square error (MSE) of k-AD algorithm was reduced to 0 after 35 iterations, and the descending speed was obviously faster than that of AD and demons algorithms
Summary
Myocardial infarction refers to ischemic necrosis of the myocardium; the blood flow of the coronary arteries is drastically reduced or interrupted after the occurrence of coronary artery disease. Ventricular remodeling refers to a series of changes in the size, shape, wall thickness, and tissue structure of the ventricle due to myocardial injury or increased load. It is a process of lesion repair and overall ventricular compensation and secondary pathophysiological reaction. Automatic ventricular remodeling of the body is harmful for human body It will cause varying degrees of cardiac dysfunction and hemodynamic changes, affect the structural repair and function of the heart, and eventually lead to heart failure and even death. It is patient-centered and adopts motivational interview communication to arouse the intrinsic motivation of patients to change their behavior [4]. erefore, it was intended to adopt cross-theoretical model rehabilitation exercise nursing to treat patients with myocardial infarction
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