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Introduction

MRI stands for Magnetic Resonance Imaging, and it is an imaging technique most commonly used in medical fields. It exploits how nuclei in a strong and constant magnetic field respond when they are “hit” with a weak oscillating magnetic field, such as a radio wave. The way in which the nuclei reacts can be used to measure properties of the material made up of those nuclei. When applied to an object made out of a variety of materials, this technique can be used to contrast the materials to form an image.

Uses of MRI

MRI is most commonly used in the medical industry where it is used to provide a cross sectional view of a patient. Its main benefit over other scanning techniques is that it doesn’t require any potentially dangerous forms of radiation, and so it can be a safer way to image a patient - especially if they are likely to need multiple scans over a period of time. Moreover, a radiologist can use a variety of methods for performing MRI scans which can make the scans very versatile to different locations and situations, and so can generally help provide better contrast to make for a better image.

MRI is also useful in many other fields. It can be used to help research in a variety of fields such as geology, plant science, material science, and physics. The ability to study internal structures whilst not destroying them can be incredibly useful when performing experiments. It can also be used in archeology and art history/conservation as it can reveal insights into the history and production of artefacts.

Core idea

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T2

Location and imaging

idea

kspace

maths

physical implementation

pulse sequences

Further resources