Pleural Fluid Echogenicity Measured by Ultrasound Image Pixel Density to Differentiate Transudative versus Exudative Pleural Effusions

Nilam J. Soni, Zachary S. Dreyfuss, Shane Ali, Austin Enenmoh, Kevin C. Proud, Michael Mader, Maria I. Velez, Sean B. Smith, Jay I. Peters, Marcos I. Restrepo