Medical imaging is a tool used in diagnosis, research and medical procedures. The process produces both internal and external images of the human body. As of last year, the number of medical imaging students in the world was listed as five billion.
Biological imaging generally includes radiology, nuclear medicine, endoscopy, medical photography, thermography and exploratory radiological sciences. Medical imaging also includes methods which do not produce images, but rather maps or graphs which are used in a similar manner. These include electroencephalography (EEG), magnetoencephalography (MEG), electrocardiography (ECG) and a few others.