Influence of Conventional and Special Breathing Training on Heart Rate,Image Quality,and Radiation Dose in GE 256-row Coronary
Objective:To investigate the impact of respiratory training on heart rate,image quality and radiation dose during coronary computed tomography angiography(CCTA)with GE Revolution CT mo-dality.Methods:CCTA with prospective ECG-gating and Step-and-Shoot Freeze(SSF)technique was performed for respiratory training.A total of 108 patients were divided into two groups:Group A(54 pa-tients)underwent special breathing training-holding their breath at the end of inhalation,while Group B(54 patients)received routine breathing instructions and held their breath as prompted by the GE 256-row Revolution CT system.Statistical analysis was performed for heart rates,image quality,and radiation dose of both groups.Results:The heart rate was significantly lower in Group A compared to Group B(P＜0.05).The image quality of the three main coronary arteries(right coronary artery,left anterior descending artery,and left circumflex artery)was significantly better in Group A than in Group B(Fisher's exact test,P=0.010).No difference in radiation dose was observed between the two groups(P＞0.05).Conclusion:Special respiratory training significantly improves image quality in GE 256-row Revolution CCTA with-out increasing radiation dose,highlighting its importance in enhancing the diagnostic accuracy of CCTA.
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