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
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.