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RISS 인기검색어
- 검색키워드
- 저자 : 안인현(In Hyun An) (검색결과 2 건)
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ECG-gated Cardiac MDCT 검사에서 심장기능 평가를 위한 최적의 수축기말과 확장기말 Phase(%)에 관한 연구
이현규(Hyun Gyu Lee),최재성(Jae Seang Choi),이현성(Hyun Seang Lee),안인현(In Hyun An),최남길(Nam Gil Choi) 대한CT영상기술학회 2010 대한CT영상기술학회지 Vol.12 No.1
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.
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MDCT을 이용한 Cardica CT 검사에서 ECG-pulsing기능의 사용 경험 및 고찰
박현(Hyeok Park),이현성(Hyun Seong Lee),김태성(Tae Seong Kim),안인현(In Hyun An),최남길(Nam Kil Choi) 대한CT영상기술학회 2008 대한CT영상기술학회지 Vol.10 No.1
Purpose Cardiac CT comparing with other region’s same scan range very much radiation dose. so, I wanted to know the method which can reduce radiation dose through the effective methode of ECG-pulsing method. Materials and Methods I performed the test of patients which were prescribed for Cardiac CT because of chest pain, etc. I measured patients’ heart rate before the test. When their heart rate was more than 65 times, I used the ‘B-Blocker and I analyzed the use probability and success rates of ECG-pulsing, DPL and the optimum image reconstruction data. Results Among the 200 patients, I used the ECG-pulsing in 136 cases (68%) and DPL (mSv-cm) value was from 513 to 836 (mean value : 649). Ca scoring was from 44 times to 65 times (the mean : 57 times) in HR and from 36 times to 69 times (the mean : 53 times) in CTA. I didn’t use the ECG-pulsing in 62 cases (32%). DPL (mSv-cm) value was from 922 to 1320 and mean value was 1074. Ca scoring was from 53 times to 90 times (the mean : 66 times) in HR and from 38 times to 73 times (the mean : 59 times) in CTA. I didn’t the ECG-pulsing method because when I got the Ca scoring data, mostly BPM’s maximum was more than 64 (46cases, 73%). Image reconstruction R-R interval was shown from 65% to 69%. Conclusion When I used the ECG-pulsing method, DPL dose decreased by 39.6% than I didn’t use that. With the recent development of CT equipment, I recommend much use of the ECG-pulsing method because I think that the use of ECG-pulsing method has radiation dose decreased without a drop in image quality through the supplement of diverse ECG-pulsing methods and the maximum use of ECG-pulsing in fast CT.
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