MRI can be defined as a physical medical examination based on the occurrence of resonance with a magnetic effect, for the purpose of detecting the cells of the body, and the collection of samples of reflections of energy through which the formation of a general picture of the situation and then be the medical diagnosis by the specialist.
The principle of MRI work
It is also known that when two physical waves overlap with the same amplitude and frequency, a wave is produced by the double amplitude of the original wave. This generates the energy acquired by those objects that are exposed to resonance. The magnetic resonance system takes advantage of this physical phenomenon by targeting the hydrogen atoms in the body , Being atomic atomic atoms; they have one positively charged proton revolving around the axis of its magnetic field with high intensity compared to other atoms.
When hydrogen atoms are targeted by a magnetic field, the atoms move according to the direction of the field. The atoms take opposite pathways to their position from the influencing field, resulting in the decoupling of the atoms of opposite hydrogen atoms. The atoms that are not matched by other hydrogen atoms are in the direction The magnetic resonance (NMR), which generates energy, causes the proton to move from its orbital orbit to a higher orbit. When the radio wave effect disappears, the protein returns to the range Resulting in the loss of energy on pulse that can be captured in the form of samples collected by Fourier transforms; to form an accurate picture of the parts where the resonance occurred at high resolution.
Inspection equipment
- Fasting at least four hours before the examination, as instructed by the doctor.
- Take precautions before taking the test for allergy and asthma patients.
- Removal of metal and electronic materials (watches, telephones, metal hair clips)
- Wear your dress and is equipped by your doctor.
- Detection of pregnancy before screening.
- Keep in mind that the duration of the examination may be up to an hour, so must be taken precautions like the need for output and others.
- Alert the doctor of radiology of the presence of devices implanted in the body (cardiac pacemakers, surgery screws in the bone).
Uses MRI scans
- Diagnosis cases that avoid the use of radiographs.
- The detection of tumors especially the cerebral ones.
- Diagnosis of vascular diseases.
- Detection of internal bleeding resulting from exposure to various injuries.
- Detection of diseases: chest, brain, abdomen, spine, joints, ligaments, and bones.