European journal of radiology
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The aim of this study was to evaluate the effectiveness of dual-exposure dual energy subtraction technique in flat-panel chest radiography for lung nodules detection. Chest radiographs were acquired in 100 patients (57 men and 43 women; mean age, 60.2 years; range, 18-89 years) using a flat-panel digital chest system. These images were evaluated by seven radiologists. ⋯ Observer performance for detection of lung nodules with subtraction images was tested by using receiver operating characteristic (ROC) analysis of individual and averaged reader data. The average area under the ROC curve (Az value) significantly increased with subtraction images (Az=0.79 in standard radiographs versus Az=0.84 with subtraction images, p<0.05). In conclusion, the two-exposure dual-energy subtraction chest radiography significantly would improve detection of lung nodules.
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Transcutaneous ultrasound enables visualization of pleural-based lesions but with a poor correlation to specific pathology. Ultrasound contrast agents in conjunction with contrast-specific imaging techniques are increasingly accepted in clinical use. Based on the dual arterial supply of the lung, this organ is suited for evaluation of arterial vascularity by contrast-enhanced sonography (CES). This review will present first data about practise and clinical use of CES in patient with peripheral lung lesions. ⋯ : CES of the chest is limited to pleural-based lesions. CES enables to characterize lung lesions regarding TE and EE. The clinical benefit is yet unclear, but first results are encouraging.
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We evaluated follow-up magnetic resonance (MR) images for osteoid osteoma treated with percutaneous radiofrequency ablation (RFA). ⋯ MR imaging demonstrated a characteristic appearance and subsequent changes of treated areas for osteoid osteoma following RFA.