Motion artefact removal in MRI

Kamlesh Pawar, Zhaolin Chen

Magnetic resonance imaging has revolutionised medicine and medical research, but one of the biggest issues radiologists still grapple with are the artefacts created when patients shift around during the scan. A single magnetic resonance scan can take anything from few seconds to 30 minutes, and can resolve details less than a millimetre in size. Unfortunately, this means that if the person being scanned moves by more than a millimetre, the resulting image is distorted by ripples that can blur vital structural details.

In this project, we use machine learning methods to recognise these artefacts and remove them, giving a much cleaner image for the clinician or researcher to work with.

Figure: (a) motion correction T1 MPRAGE image; (b) motion corrected T1 MPRAGE image.