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OBJECTIVE The purpose of this study was to prospectively evaluate the usefulness of scoring perfusion defects on perfusion images at dual-energy CT for assessment of the severity of pulmonary embolism. SUBJECTS AND METHODS Thirty patients (13 men, 17 women; mean age, 55 +/- 15 [SD] years; range, 26-81 years) with pulmonary thromboembolism underwent(More)
OBJECTIVE The purpose of our study was to determine the CT appearance and clinical significance of a right paratracheal air cyst at the level of the thoracic inlet. MATERIALS AND METHODS Sixty-five consecutive patients with paratracheal air cysts were included in this study. The location, level, size, and shape of the paratracheal air cysts on CT were(More)
AIM To show whether the clinical and radiological features of newly developed ulcer-like projections (nULPs) in an aortic intramural haematoma (IMH) on follow-up computed tomography (CT) images, are different from those of the initial ULPs (iULPs) on the initial CT images. MATERIALS AND METHODS A review of the radiological database revealed 98 patients(More)
PURPOSE To develop a system for texture-based quantification of emphysema on high-resolution computed tomography (HRCT) and to compare it with density-based quantification in correlation with pulmonary function test (PFT). MATERIALS AND METHODS Two hundred sixty-one circular regions of interest (ROI) with 16-pixel diameter [66 ROIs representing typical(More)
OBJECTIVES We sought to demonstrate the long-term natural course of descending aorta dilation after acute aortic dissection (AD) and identify early predictors for late aneurysmal change. BACKGROUND Aneurysmal dilation of the aorta is a critical late complication in AD patients. METHODS Contrast-enhanced computed tomography (CT) was performed during the(More)
The aim of this study was to assess high-resolution computed tomography (HRCT) findings of exogenous lipoid pneumonia. High-resolution computed tomography was obtained in 25 patients with proven exogenous lipoid pneumonia resulting from aspiration of squalene (derived from shark liver oil). Diagnosis was based on biopsy (n = 9), bronchoalveolar lavage (n =(More)
PURPOSE To determine the clinical utility of dual-energy computed tomography (CT) in evaluating solitary pulmonary nodules (SPNs). MATERIALS AND METHODS This study was approved by the institutional review board, and informed consent was obtained. CT scans were obtained before and 3 minutes after contrast material injection in 49 patients (26 men, 23(More)
The severity of chronic obstructive pulmonary disease (COPD) is evaluated not only by airflow limitation but also by factors such as exercise capacity and body mass index. Recent advances in CT technology suggest that it might be a useful tool for evaluating the severity of the disease components of COPD. The aim of this study is to evaluate the correlation(More)
AIM To assess initial and follow-up CT findings of invasive pulmonary aspergillosis (IPA) in solid organ transplant (SOT) recipients using new diagnostic criteria, and to compare initial CT findings of survivors with those of patients who died. MATERIALS AND METHODS Forty-six adult SOT patients who met the 2008 EORTC/MSG criteria for proven or probable(More)
Typical radiologic findings of a pulmonary metastasis include multiple round variable-sized nodules and diffuse thickening of interstitium. In daily practice, however, atypical radiologic features of metastases are often encountered that make distinction of metastases from other nonmalignant pulmonary diseases difficult. A detailed knowledge of the atypical(More)