How MRI works
Imaging with an MRI device is done by scanning the body with magnetic fields. MRI is a non-invasive examination, without side effects, through which problems such as tumors in the brain, problems in the spine, joints, and others can be detected.
Magnetic Resonance Imaging (MRI) device works by non-invasive body scanning for medical diagnostic purposes, brain research, psychology, psychiatry, biological research and more. This examination is especially effective for imaging the central nervous system - the brain and spinal cord - and joints, such as the knee and shoulder. In MRI images, you see only soft tissues - you see not the bones themselves, but only the bone marrow. Examples of common uses for MRI are: search for tumors in the brain, diagnosis of multiple sclerosis, evaluation of meniscus status in the knees, examination, intervertebral disc hernia and others.
An expert in this field explains that the MRI machine is a scan from the last generation of imaging tools. This generation is based on the formation of an image by the changing magnetic fields. This examination has no side effects and can give information of great importance in order to continue treatment, enhance the diagnosis or deny the diagnosis. This information is very necessary and valuable and therefore more than 90% of people who undergo an MRI examination overcome uncomfortable sensations such as pressure from closed spaces and others to achieve progress in the diagnosis and treatment process.
How is an MRI scan performed?
The MRI test takes about 20 to 30 minutes. During this examination a person is inserted into a large and powerful magnet that can reach a magnetic force 30,000 times greater than the power of the globe field. With radio transmitters placed in the MRI room, the direction of the magnetic field can be changed at a certain point. After that, the examiners stop broadcasting, at which point the body releases energy again, which it enters into a return broadcast. Through the information returned and with advanced radio wave detectors, examiners can build an image that shows the anatomy of the body and reveals abnormal processes inside the body.
What do we do with the person who is afraid of the closed places?
Initially, a person can be inserted into a device similar to an MRI machine. Where the person lies inside this device and exercises. Sedative medications can also be given to a person. Likewise, if the state of fear is severe, a person can even be sedated.
Does the MRI device noise?
Yes, during the MRI examination he hears a strong noise, as is similar to the repeated methods on metals every few seconds. Noise stems from changes in magnetic fields from broadcast mode to listening mode. Noise can be overcome by headphones transmitting music and relieving the patient during the examination.
Can it move during an MRI scan?
Theoretically, if we suddenly and dramatically move, such as in the case of a cough, for example, this movement disturbs part of the examination and then examiners may need to re-photograph the part where the jamming occurred and then the examination will take a little longer. Routine light movements such as breathing and a heartbeat are movements that are taken into account by examiners and therefore do not disrupt the examination.
Who is not allowed to perform an MRI scan?
People with pacemakers are not recommended to undergo this examination because the examination can disrupt the activity of the pacemaker. Also the people who were injured and the like, and now they have fragments in the body that are not advised to undergo an MRI test because the fragments interact with the magnetic field and move towards it. To avoid situations in which an inconvenient person undergoes this examination, before every examination every person receives a questionnaire that contains questions that examine its suitability.
Finally, if you are sent to conduct an MRI check, do not be afraid of that. An examination can give information of great importance to continuing treatment and to promoting or denying diagnosing the problem.
