Medical scans such as MRI, ultrasound, CT scans are used to properly diagnose a disease and to offer the best treatment.
Medical scans provide a visual representation of the interior of the body so that a disease can easily be located.
It makes a normal database of anatomy and physiology so that any abnormalities can easily be located by comparing them to the normal database.
Advances in the field of medical technology have led to to the formation of radiation therapy. This technique is effective in the treatment of cancer, as it kills only the cancerous cells and doesn't damage the normal cells.