[RETRACTED] Usefulness Evaluation of Lower Extremity CT Angiography Examination using Heart Rate

[RETRACTED] Usefulness Evaluation of Lower Extremity CT Angiography Examination using Heart Rate

Lower Extremity CT Angiography 검사 시 환자의 심박동수에 따라 하지 혈관의 조영증강 차이를 비교 분석하여 최적화된 영상기법을 찾고 유용성을 평가하고자 한다. 2022년 1월부터 22년 8월까지 아주대병원을 내원하여 Lower Extremity CT Angiography검사를 진행한 외래환자 139명을 대상으로 하였으며, 심박동수에 따라 A(HR≤65), B(65<HR<80), C(80≤HR), 추가로 심박동수 65 이하의 환자들 중 Heart Rate를 고려하여 6초의 지연시간을 두고 스캔한 D 그룹으로 나누어 조영제 도달시간과 조영증강평균값을 비교 분석하였다. 결과는 SPSS 26 ver. 을 사용하여 분석하였다. 정량적 평가결과 Heart Rate가 65회 이상인 B, C그룹은 A 그룹에 비해 슬와 동맥의 HU 값이 우수하였으며, D 그룹은 A 그룹에 비하여 HU의 개선 효과를 보였다.(p<0.001) 심박동수의 차이는 하지 혈관 조영증강 강도에 영향을 주었다. 따라서 Lower Extremity CT Angiography 검사 시 심박동수를 활용하여 환자마다 적절한 검사 타이밍을 적용하는 것이 효과적이라 하겠다.

The purpose of this study was to find an optimized imaging technique and evaluate its usefulness by comparing and analyzing the difference in contrast enhancement of lower extremity blood vessels according to the patient's heart rate during lower extremity angio CT examination. From January 2022 to August 22nd, 139 outpatients who visited Ajou University Hospital and underwent lower extremity angio CT examination were targeted. According to the heart rate, the groups were divided into four groups: A(HR≤65), B(65<HR<80), C(80≤HR). In addition, among patients with a heart rate of 65 or less, the heart rate was considered, and the scan was divided into group D with a delay time of 6 seconds. The time of arrival of contrast medium and the average value of contrast enhancement were compared and analyzed. The results were analyzed using SPSS 26 ver. As a result of quantitative evaluation, B and C groups with a heart rate of more than 65 times had better HU values in the popliteal artery than A group (HR≤65), and D group showed better HU improvement effects compared to A group (p<0.001). The difference in heart rate affected the angiographic intensity of the lower extremities artery. Therefore, it is effective to apply the appropriate test timing for each patient by using the heart rate during the lower extremity angio CT Scan.