Solitary hyperdense shadow is an imaging description, commonly seen in changes in the bronchi of both lungs, changes in pulmonary fibrosis, such as bronchial asthma, chronic obstructive pulmonary disease, and interstitial fibrosis of both lungs. Long-term exposure to dust, masons, coal mines, hairdressers, cooks, tailors, and special jobs, such as volatile acids in the chemical industry. As a result of prolonged irritation in this environment, combined with their own smoking, both lungs will suggest a few scattered, or more dense, cords of hyperdense shadows on physical imaging. Some acute diseases, such as pneumonia or chronic infectious diseases, tuberculosis, may also leave similar striated changes in the lungs during the recovery period, but these changes are not clinically significant and do not require special treatment and do not affect normal work or study.