ECG-gated Cardiac MDCT 검사에서 심장기능 평가를 위한 최적의 수축기말과 확장기말 Phase(%)에 관한 연구

ECG-gated Cardiac MDCT of the Most Appropriate End Systolic and End Diastolic Phase for Heart Functional Evaluation

Purpose The objective of our study was to evaluate ECG-gated cardiac MDCT in the heart functional evaluation of the most appropriate end systolic and end diastolic phase(%). Materials and methods The objects of this study were 100 patients(38 men, 62 women, age range: 21-83 years, mean: 57 years) with a chest pain. Using a 64 slice MDCT(Somatom Sensation Cardiac 64, Siemens Medical System, Erlangen, Germany) and one short axis image at 6 mm slice thickness and 5% R-R interval from 5% to 95% in the middle left ventricle region was reconstruct d after the exam It was reconstructed that the axial images of 5 mm slice thickness after checking the end systolic and end diastolic images of die short axis images with the blind test. And then, performing die volume program manually and got the volume data. Therefore, we evaluated the heart function by the ejection fraction formula. Results Of the patients, there were 7 patients with a abnormal ECG, 21 patients with a chest discomfort, 61 patients with a chest pain, 10 patients with dyspnea, and one patient with syncope. Two inspectors checked same patients. There were 2 patients with end systolic(20%) end diastolic(80%), 2 patients with end systolic(20%) end diastolic(90%), 4 patients with end systolic(25%) end diastolic(90%), 91 patients with end systolic(30%) end diastolic(90%), and one patient with end systolic(35%) end diastolic(90%) in the observation A. There were 2 patients with end systolic(20%) end diastolic(80%), 2 patients with end systolic(20%) end diastolic(90%), 3 patients with end systolic(25%) end diastolic(90%), 92 patients with end systolic(30%) end diastolic(90%), one patient with end systolic(35%) end diastolic(90%) in the observation B. So, It was signigicant at 30% end systolic and 90% end diastolic(p<0.05). It was not a significant result between die ejection fraction in cardiac sonogram and the ejection fraction in ECG-gated cardiac CT (p<0.05). Conclusion Most part of die results were constructed end systolic at 30% and end diastolic at 90%. And ejection fraction were a similar result between die cardiac sonogram and CT, though the cardiac CT was lower than that in sonogram.