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When tracing down the trachea to the carina, the trachea is midline without deviation.
When tracing down the trachea to the carina, the tracheal diameter is normal without
narrowing or widening.
When tracing down both main bronchi, the carinal angle is within 100 degrees.
When tracing down both main bronchi, the bronchi are patent without narrowing or cut-off.
When tracing down both main bronchi, there is no evidence of an inhaled foreign body.
When both lungs are well expanded and similar in volume, the lung volumes are symmetric.
When comparing the apical, upper, middle, and lower zones in turn, the lung fields are
symmetric.
When comparing the apical, upper, middle, and lower zones in turn, there are no areas of
abnormally increased density.
When tracing both hila, both hila demonstrate a normal inverted C-shape.
When tracing both hila, both hilar angles are within the normal range (≤120 degrees).
When tracing the lung vessels, the lung vessels branch progressively and uniformly.
When tracing the lung vessels, peripheral lung markings are consistent with normal
vascular structures.
When tracing the lateral margins of the lungs to the costophrenic angles, the costophrenic
angles are sharp.
When tracing the hemidiaphragms to the vertebrae, the right and left hemidiaphragms are
at normal relative heights.
When tracing the cardiac borders, both left and right heart borders are clearly visualized.
When checking the cardiac position, the heart is located approximately one-third to the
right and two-thirds to the left of the midline.
When assessing cardiac size, the cardiothoracic ratio is within the normal range.
When checking the position and size of the aortic arch and pulmonary trunk, the aortic knob
diameter is within the normal range (≤35 cm).
When checking the position and size of the aortic arch and pulmonary trunk, the right
pulmonary artery diameter is within the normal range (≤20 mm).
When checking the position and size of the aortic arch and pulmonary trunk, the left
pulmonary artery diameter is within the normal range (≤20 mm).
When checking the width of the upper mediastinum, the mediastinal width is within the
normal range (≤8 cm).
When examining the hilar vessels, the hilar vessels are clearly visualized on both sides.
When tracing along each posterior rib on one side of the chest, the ribs are intact without
fractures or abnormal lesions.
When tracing along other bony structures, the clavicles, scapulae, spine, and other bony
structures are intact without fractures or abnormal lesions.
When reviewing the upper abdomen, there is no evidence of free gas beneath the
diaphragms.
When reviewing the upper abdomen, there is no evidence of subcutaneous emphysema.
When reviewing the upper abdomen, there is no evidence of a hiatus hernia.
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