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Magenetic Resonance Imaging -> What is MRI? When is MRI performed?


















Magnetic Resonance Imaging (MRI)

The Neuroradiology department of the National Neuroscience Institute equipped with two MRI scanners:

1) GE Neuro-optimised 1.5 Tesla Signa Horizon LX  NV/i

2) Philips Ultra-high field 3.0 Tesla Intera


What is MRI?  When is MRI performed?   
What to expect when you come for MRI
Safety aspect of MRI.










What is MRI?

Magnetic Resonance Imaging or MRI uses a strong magnetic field, (not X-rays) to create images of the body. Radiofrequency (RF) pulses are generated to interrogate the hydrogen atoms that make up the human body. Powerful computers process the returning RF signals (echoes) to form medical images. As a rule, MRI produces high-resolution images in multiple planes.


When is MRI performed?

Depending on the coils and pulse sequence selected, your MR examination can be tailored to yield the desired diagnostic information. In our department, MRI is also used extensively for the study of blood vessels, flow dynamics, 3D-volume rendering, and stereotactic surgical guidance.

Advanced techniques and research software make use of cutting edge technologies to visualise not only anatomical images, but also early changes that occur in brain function before there is any visible abnormality in structural imaging. Examples of Functional MRI (fMRI) work include diffusion, perfusion and task activation research pulse sequences.