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Relationship between lung and potential needle placement. (A) Anatomic reconstruction of lung windows (B) with reconstructed computed tomography of thoracic spine in sagittal plane. Numbers indicate 1: needle tip location with initial placement, 2: cephalad reorientation & 1.5 cm advancement, and 3: caudal reorientation & 1.5 cm advancement. Note proximity of the needle tips to the lung parenchyma with either direction.
