肺脏结构图片及X线表现

Key cardiothoracic landmarks include the suprasternal notch just above the junction of the clavicles and subxiphoid region. The bony sternum overlies the spine on the frontal film and is therefore not clearly identified in that projection. The junction of the ribs with the sternum is usually composed of calcified cartilage and are shown as a segmental change as the rib approaches the st..