Consecutive sections were obtained with 3-mm slice thickness and without intravenous contrast. Computed Tomography (CT) images were shown both with mediastinal and lung window settings. Positron Emission Tomography (PET) scintigraphic and CT images obtained from the same level were given side to side for comparison. All anatomic structures in an image were numbered and given in the explanation section at the bottom of the page. Vertebral levels were marked on each vertebra.