How Does an MRI Scan Work?
MRI stands for Magnetic Resonance Imaging, and is used to obtain detailed images of the body, particularly hard to view areas such as the brain, spine and abdomen. The MRI scan uses strong magnetic fields to generate detailed images which are generally 2D. Sometimes, several images can be taken from different angles and combined to create a 3D image which is viewed on a computer screen. MRI scanners are the best way to find malignant or benign tumours and tracking any changes in the size of the tumour. It can also detect bleeding in the brain and abnormal growths like those present in Multiple Sclerosis sufferers. Being able to view the soft tissue of the body in this way aids diagnosis and can be lifesaving. Many private hospitals in the UK will offer a private MRI scan to their patients. As the images are generated by powerful magnetic fields and radio waves 10,000 to 30,000 times more powerful than the earth’s, no damaging forms of radiation are present in the procedure. As such, there are no known dangers from using MRI scanners, making them safer than traditional x-ray machines. Women who are less than 12 weeks pregnant are advised against using MRI scanners because of a small theoretical risk. Some people may find having a MRI scan uncomfortable, as the you are required to be perfectly still during the procedure, which takes place in a cylindrical shaped piece of apparatus. Therefore, people who dislike small spaces may need some medication to relax in order for the scan to be successful. Some state-of-the-art MRI scanners at private hospitals are made slightly larger to alleviate the feelings of claustrophobia. They also have other added benefits including being able to scan several body parts at once, and having an improved level of imaging.
