Comet tail artefact is a short path reverberation artefact that weakens with each reverberation, resulting in a vertical echogenic artefact that rapidly fades as it continues in to the ultrasound image.
A young man with a history of right sided pneumothorax, apical bullectomy and VATS pleurodesis presents with right sided pleuritic chest pain. You are asked to exclude recurrent pneumothorax.