Magnetic Resonance imaging (MRI)
What is Magnetic Resonance imaging (MRI)?
MRI is already one of the modern means of imaging the human body from inside (has been used in the medical field for about 25 years) and can be compared with CT scan with the following differences:
• MRI does not rely on X-rays in imaging, but uses a huge magnet depends in its ability to imaging on the proportion of water component in the cells of the body to be imaged, and thus avoids the risk of radiation on the cells of the body and is best suited for imaging pregnant women
• It can see the inside of the body and organs as in the CT scan, but in a different way, which enables us to see (diagnose) some diseases that cannot be seen by the radiation
• Contrasts used with MRI are very different from those used with radiation and therefore patients with sensitivity to the contrasts can perform the MRI with contrast without problems
• In general, MRI provides an image with more precise and clearer details
The price of the examination is much higher in MRI, as well as the cost of the contrast
MRI is prohibited to
Heart patients who rely on the pacemaker due to the strength of the magnet used in imaging, which puts their lives at risk, so any medical or non-medical devices should be left outside the examination room.
Patients whose bodies contain metal fixing devices such as nails and plates fixing bone fractures, as the magnet will cause attraction to these parts, which may lead to the movement of these segments from their place, which poses a risk to the patient. Note that most of these devices are made of non-magnetic materials so as not to be subjected to tension during entry into the magnet. However, these devices often spoil the examination and result in image distortion (without affecting the patient itself) and may therefore reduce the value of the examination.
NB: Please tell your radiologist or imaging technician before performing the examination so that the desired benefit can be estimated
Cautions while performing MRI
• Be sure to leave all of your metal belongings outside the examination room, such as watches, keys or any metal buttons in the shoe or other.
• Be careful not to insert credit cards with you into the MRI room. These cards store the information through the magnetic tape on the back, and once you enter near the magnetic field, the card will be completely erased and become ineffective and non-valuable. You should leave your belongings with one of your companions during the examination.