Fig. 1

A 57-year-old patient with a peripheral lung lesion. A percutaneous core biopsy was requested to determine the nature of the lesion. a Axial contrast-enhanced computed tomography (CT) image revealing a round lung lesion in the left lower lobe with pleural contact. b Transverse gray-scale ultrasound (US) image obtained before biopsy revealing a hypoechoic lesion relative to the surrounding aerated lung. Positioning a transducer in the adjacent rib space shows broad pleural contact, providing a sonographic window for sampling. c Transverse gray-scale US image revealing a 16-gauge needle throw for core biopsy within the lesion (arrow), performed within a single breath-hold. d Color photograph of the biopsy sample