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.
A radiologist is a medical doctor who specializes in the diagnosis and treatment of disease and injury by using medical imaging technologies, such as MRI and CT. Radiologists also treat diseases, such as cancer or heart disease, by means of radiation or minimally invasive, image-guided surgery. Radiologists are often able to see problems early by interpreting the results of your imaging study and can provide an accurate diagnosis to your referring physician.