1. Composite 2D-mode image and M-mode image of a small pleural effusion
Composite 2D-mode image and M-mode image of a small pleural effusion. The 2D-mode image shows the cursor placement across the chest wall and an anechoic area between the chest wall and lung air artifact. The M-mode image demonstrates respirophasic movement of the lung toward the chest wall, called the "sinusoid sign," confirming the presence of pleural fluid.
Source: Chapter 7. Thoracic Ultrasound, Handbook of Critical Care and Emergency Ultrasound
Citation: Carmody KA, Moore CL, Feller-Kopman D. Handbook of Critical Care and Emergency Ultrasound; 2011 Available at: Accessed: October 28, 2017
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