Emphysema: Hyperaeration means that the lungs appear more radiolucent on chest x-ray and over expanded. This is due to enlargement of the airspaces caused by destruction of the walls of the alveoli (air sacs).
A radiographer works with medical imaging equipment (particularly X-rays) to create images of patients that a physician may use in diagnosing injuries and disease. They typically work in hospitals, large clinics or as part of a dedicated radiography business that sees referrals for these procedures.
The radiologist interprets the medical images created by MRIs, CT scans, X-rays, and ultrasounds and must know how to operate all types of machinery used to obtain medical images. He or she also administers radioactive materials to the patient to obtain medical imaging.