The one-step image study of acute chest pain using 128-slice spiral CT with low radiation dose

【Objective】To explore the clinical value of one step examination of acute chest pain using 128-slice spiral CT with low radiation dose. 【Methods】120 patients with acute chest pain received one step examination by 128–slice CT. All the patients were randomly divided into A and B groups, Prospective ECG-triggered axial scan protocol and retrospective ECG-triggered spiral scan protocol were used respectively in group A and B. The radiation dose and image quality were evaluated with t-test and Chi-square test. 【Results】The mean effective dose for group A and group B was(7.92±2.19)mSv and(24.01±7.62)mSV, respectively, for which there are no significant difference between two groups(t=4.089,P0.001). There are no significant difference for image quality of coronary artery between two groups(χ2=3.521,P=0.318). CT values of the pulmonary artery and thoracic aorta in group A and B after enhancement were more than 200 HU, and for which there are no significant difference between two groups(t=0.733,P=0.467;t=1.636,P=0.107).【Conclusion】One step examination of acute chest pain using Prospective ECG-triggered axial scan protocol with 128-slice spiral CT can reduce effective radiation dose and maintain image quality at low intermediate HR.