![]() In our study, the ultrasonography on gray scale in real time detected pleural effusion with 60% specificity, 100% sensitivity and 88.37% accuracy. Using the color Doppler examination we analyzed the fluid color sign of pleural effusion. All patients were examined by ultrasonography on gray scale and color Doppler and the presence or absence of pleural effusion was confirmed by thorax CT. We prospectively analyzed 86 patients who, according to their chest radiographs, were suspected of having minimal pleural effusion. To compare the results of gray scale ultrasound with those of color Doppler ultrasound in order to evaluate the minimal pleural effusion and to differentiate the minimal pleural effusion from pleural thickening.
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