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Artifacts 5: On the sidelines

This right paracolic gutter image is taken from a patient with significant ascites. Notice how bright the bowel walls are (solid purple arrows). This is because the air in the bowel acts as a strong reflector, and because ascites (being fluid) only minimally attenuates the incident and reflected ultrasound beam. Thus, a stronger signal is transmitted thus andRead more

Artifacts 4 – lung pulse

Left lung with lung pulse Right lung with lung pulse The “lung pulse” is an ultrasound sign first described by Dr Daniel Lichtenstein in 2003. Essentially, it is the detection of the subtle cardiac pulsation at the periphery of the lung (parietal pleura to be exact) on the M mode. In a normally ventilating lung,Read more