Soft tissue density shadow in the lower lobe of the right lung is an imaging description of a lesion in the lower lobe of the right lung during chest CT examination, which may be an imaging manifestation of diseases such as tuberculosis, pulmonary hematoma, or lung tumor. Soft tissue densitometry is a change in the density of local soft tissues caused by lesions, which may be soft tissue edema, calcification, inflammatory changes, or tumor formation, etc. In order to clarify the specific nature of the soft tissue densitometry in the lower lobe of the right lung, it is generally recommended that further tests, such as tuberculin test, PET-CT, or pathology, be performed. If the nature of the soft tissue density shadow in the lower lobe of the right lung is clarified after complete examination, corresponding treatments can be given according to the different causes of the disease, for example, anti-tuberculosis drugs are given to treat tuberculosis, and surgery, radiotherapy and other therapeutic measures are taken to treat lung tumors.