Abstract
The objective of this study was to compare the diagnostic value of computed tomography (CT) based on iterative reconstruction algorithm in old myocardial infarction (OMI), thereby providing theoretical guidance and practical basis for clinical treatment. In this study, in order to provide theoretical guidance and practical basis for the diagnosis and treatment of clinical OMI, 10 patients with OMI were selected and divided into two groups, with 5 patients in each group. In addition, an algebraic iterative reconstruction algorithm is constructed, which starts from the initial estimation value, compares, and corrects the estimation results and the measured results continuously until the error between the two results is less than the predetermined value. The experimental group was optimized by algebraic iterative reconstruction algorithm, and the control group was reconstructed by the hospital original method. The image quality parameters under different iteration times were analyzed and compared to obtain the optimal iteration times. The value of iterative reconstruction algorithm in clinical diagnosis was investigated by analyzing the time of drawing and the accuracy of diagnosis after drawing. Through the analysis and comparison of the image quality parameters of the patients from the experimental group, it was found that the image quality firstly increased with the increase in the number of iterations but decreased with the increase of the number of iterations after a certain number of iterations. The results showed that the optimal number of iterations was 13 times. The drawing time of the experimental group and the control group was 54.27 minutes and 117.87 minutes in turn, so the difference between the two groups was significant (P < 0.05). Besides, there was a statistically marked difference in the accuracy rate of the experimental group (93.33%) and the control group (73.33%) (P < 0.05). In conclusion, the time required for coronary artery CT imaging using algebraic iterative reconstruction algorithm was greatly reduced and the diagnostic accuracy was hugely improved. Therefore, the coronary artery CT imaging based on iterative reconstruction algorithm could make more effective use of medical resources and improve the diagnostic accuracy in the diagnosis of OMI.
Highlights
Almost all myocardial infarctions are caused by thrombus formation on the basis of coronary atherosclerotic lesions, resulting in myocardial necrosis after ischemia for more than one hour [1]
Eight weeks after the diagnosis of acute myocardial infarction [2], they are referred to as old myocardial infarction (OMI); previous history of myocardial infarction shows mild symptoms, electrocardiogram (ECG) ischemic T residual changes with st-segment downshift, and pathological Q-wave formation of localized lead, which can be considered as OMI [3]
If there are no symptoms of angina pectoris, Journal of Healthcare Engineering aspirin and other drugs can be used for treatment; if there are symptoms of angina pectoris, coronary artery conditions should be understood in time through computed tomography (CT) imaging [4], and bypass surgery should be performed if necessary [5]
Summary
Almost all myocardial infarctions are caused by thrombus formation on the basis of coronary atherosclerotic lesions, resulting in myocardial necrosis after ischemia for more than one hour [1]. Eight weeks after the diagnosis of acute myocardial infarction [2], they are referred to as old myocardial infarction (OMI); previous history of myocardial infarction shows mild symptoms, electrocardiogram (ECG) ischemic T residual changes with st-segment downshift, and pathological Q-wave formation of localized lead, which can be considered as OMI [3]. Ere is no definite change in electrocardiogram and no exact medical history, and the color ultrasound of the heart reveals a weakened segmental pulse in the myocardial wall, so it can be considered as OMI. Due to the long training cycle of doctors [6], there is a large gap in demand, and intelligent algorithm is introduced to reconstruct coronary artery CT imaging in order to alleviate the shortage of doctors and bring more rapid and accurate diagnosis to patients
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