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People refer for medical advice due to various symptoms, such as headache, dizziness, hearing loss and many other. The physician then sends them for imaging studies. Usually the cause for the symptoms is unclear; the role of imaging is to exclude conditions like cancer, infection or inflammation.
For example- let's take headache. Almost 100% of people suffering from headache will not have a brain tumor, or other serious condition, but sometimes the presenting symptom of a brain tumor is headache.
Usually in most of the diagnostic imaging departments in most of the world general radiologists make the reports of imaging examinations. It is not necessarily bad, but sometimes it is less problem oriented than reports given by radiologists with subspeciality.
For example it is better and sometimes crucial to get a report by a neuroradiologist, that does only brain and spine imaging.