The difference between color Doppler ultrasound and CT examination

Cardiac ultrasound and CT examination are important imaging methods for diagnosing heart diseases, but their working principles, application scope, advantages and limitations are different. 1. Working principle Cardiac ultrasound is to form images through the reflection and transmission of ultrasound, which can show the shape, position, movement and blood flow of various structures of the heart. CT examination is through multiple continuous X-ray scanning, and then through computer reconstruction to obtain cross-sectional images, which can show the shape, structure, density and pathological changes of the heart. 2. Application range Cardiac ultrasound is suitable for the diagnosis of heart valve disease, diastolic insufficiency, pericardial effusion, congenital heart disease, pericarditis, etc., especially for the evaluation of heart structure and function with high accuracy. CT examination is suitable for the diagnosis of coronary heart disease, coronary artery calcification, heart tumor, pericardial lesions, etc., for coronary artery disease diagnosis accuracy is high. Cardiac color Doppler ultrasound has the advantages of non-invasive, non-radioactive, good repeatability, etc., and can display changes in cardiac structure and function in real time, but the examination results are greatly affected by the operator's technology and experience. Although CT examination has certain radioactivity, it has a faster imaging speed, can complete the examination in a short time, and can provide high-resolution images, but it needs to inject iodine-containing contrast media, which may pose risks of allergy or adverse reactions for some patients.