It is a technique(MRI scan) of tomography based upon the magnetic behaviour of protonsespecially H+ in body tissue when subjected to magnetic field and RF pulses.
(Nuclear magnetic resonance imaging)
Indications for MRI scan?
- Tumor of the brain or meninges
- Skull base or orbital tumor
- Pituitary tumor
- Inflammation of the brain or meninges
- Encephalopathy
- Encephalitis
- ENT problems_ following consultation with a Radiologist
- Demyelinating disease of the brain
- Congenital problems
- Head trauma
- Epilepsy
- Stroke
- Post-operative follow-up after brain surgery
- Spinal cord compression (acute)
- Trauma
- Radioculopathy with neurological signs
- Tumor and infection arising in bone or other connective tissue
- Infection arising in bone or other connective tissue
MRI scan Contra Indications
Ferromagnetic implants (e.g.: Cardiac peacemaker, metallic orthopaedic devices, metal aneurysm dips, cardiac valve. For cardiac pacemaker and prosthetic value, patient's asked to get the card of the manufacture along with him / her)
Equipment
- MRI machine
- RF coil
Preparation of the patient (MRI scan)
- Explain the sequence of the procedure
- Inform the patient that MRI is painless procedure that does not require ionizing radiation and has no known risk
- Explain to the patient that he/she will lie flat on a narrow table inside the round opening of large magnet and patient that he/she should lie motionless during the scan
- Tell him/her that they will hear a soft humming sound and the on-off pulses of radio frequency waves
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