Diagnostic Usefulness of Dual-Energy Computed Tomography in Evaluation of the Severity of Acute Pulmonary Thromboembolism
Journal of the Korean Society of Radiology
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. This study was supported by a grant (CRI 11010-1) Chonnam National University Hospital Biomedical Research Institute. Purpose: To evaluate the usefulness of dual-energy computed tomography
... ed tomography (DECT) in severity assessment of patients with acute pulmonary thromboembolism (APTE). Materials and Methods: We evaluated 61 patients diagnosed as APTE from 2011 to 2012 in a retrospective analysis of the severity assessment indices according to Criteria by European Society of Cardiology as well as pulmonary CT angiographic obstruction score (OS) and lung perfusion index (pulmonary perfusion defect score; DS) by DECT. The correlation between OS, DS and the severity of pulmonary thromboembolism was evaluated using logit analysis. Results: Patients with high OS also showed significantly higher DS values (p < 0.001). There was a significant correlation between both the OS and DS values and the severity of the pulmonary thromboembolism using simple sequence logit analysis (p < 0.001). However, only the DS value showed a very high correlation with the severity of pulmonary thromboembolism using multiple sequence logit analysis. Conclusion: DECT provides a more useful marker for the diagnosis and severity assessment of pulmonary thromboembolism by checking the degree of lung perfusion as well as determining the existence of APTE in patients with suspected pulmonary thromboembolism. 목적: 급성 폐혈전색전증 환자의 중증도 평가에 있어 이중 에너지 전산화단층촬영(dual-energy computed tomography; 이 하 DECT)의 유용성에 대해 알아보고자 했다. 대상과 방법: 2011년부터 2012년까지 급성 폐혈전색전증으로 진단된 61명의 환자를 대상으로 후향적 분석을 했다. 대상 환자의 중증도 평가와 함께 DECT를 이용해 폐동맥 혈전색전지수(pulmonary CT angiographic obstruction score; 이하 OS)와 폐 관류결손지수(pulmonary perfusion defect score; 이하 DS) 정도를 평가했고 서열 로짓 분석을 통해 OS, DS, 그리고 폐혈전색전증의 중증도 간의 상관 관계를 분석했다.