Figure 3. Transverse (left) and longitudinal (right) views of the thoracostomy tube (TT) using the low-frequency transducer. Left, the TT is visualized in the upper portion of the screen as the anechoic circular structure with shadowing (white arrow). The pleural line and adjacent rib are not well visualized. Right, the TT is seen as it courses through the subcutaneous tissues and into the pleural space. The visceral pleura is also seen (thin blue arrow).