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.
In particular, physical geographers study the natural environment while human geographers study human society. Modern geographers are the primary practitioners of the GIS (geographic information system), who are often employed by local, state, and federal government agencies as well as in the private sector by environmental and engineering firms.