Dual-Energy CT for Assessment of the Severity of Acute Pulmonary Embolism: Pulmonary Perfusion Defect Score Compared With CT Angiographic Obstruction Score and Right Ventricular/Left Ventricular Diameter Ratio

• DOI: 10.2214/ajr.09.2681
• Publication Date: 2010-02-19T21:33:29Z
• Authors: Eun Jin Chae; Joon Beom Seo; Yu Mi Jang; Bernhard Krauss; Choong Wook Lee; Hyun Joo Lee; Koun-Sik Song
• Keywords: Dual energy

The purpose of this study was to prospectively evaluate the usefulness scoring perfusion defects on images at dual-energy CT for assessment severity pulmonary embolism.Thirty patients (13 men, 17 women; mean age, 55 +/- 15 [SD] years; range, 26-81 years) with thromboembolism underwent dual-source two voltages (140 and 80 kV). weighted average image acquisitions used angiograms, a color-coded iodine images. Two thoracic radiologists 6 years clinical experience independently assigned defect scores both angiographic (CTA) obstruction score right ventricular-to-left ventricular (RV/LV) diameter ratio angiograms. CTA based Qanadli method. defined as Sigma (n . d) / 40 x 100, where n is number segments d degree from 0 2. Correlations between score, RV/LV were evaluated. Agreement assessed per patient segment. Interobserver agreement regarding analyzed.Perfusion had good correlation (r = 0.69, r 0.66; all p < 0.001). Per patient, also (reader 1, 0.87; reader 2, 0.85; segment, moderate found kappa 0.56; 0.51; 0.05). Both readers in strong score.The proposed score. Therefore, acquisition may be helpful assessing acute embolism.