Monitoring B0 field drift due to changes in environment temperature in a low field permanent magnet based MRI scanner

In developing countries there is a high demand for medical diagnosis and treatment. A diagnosis is generally made with the aid of modern imaging techniques. However these techniques are very expensive and not available for the majority of people living in third world countries. For the diagnosis of hydrocephalus the requirements of the resolution of an image are not so high. We take the criteria to diagnose young children in developing countries suffering from hydrocephalus as the starting point of the development of a portable low field MRI scanner based on permanent magnets. We also have to take into account that temperature control might be poorly available or even absent in areas where the portable MRI will be used. In this bachelor research project we use measurements of the temporal stability and thermal stability of the Halbach magnet to show what the three-dimensional stability of the magnetic field looks like under temperature fluctuations. This data can be used to create a...Show moreIn developing countries there is a high demand for medical diagnosis and treatment. A diagnosis is generally made with the aid of modern imaging techniques. However these techniques are very expensive and not available for the majority of people living in third world countries. For the diagnosis of hydrocephalus the requirements of the resolution of an image are not so high. We take the criteria to diagnose young children in developing countries suffering from hydrocephalus as the starting point of the development of a portable low field MRI scanner based on permanent magnets. We also have to take into account that temperature control might be poorly available or even absent in areas where the portable MRI will be used. In this bachelor research project we use measurements of the temporal stability and thermal stability of the Halbach magnet to show what the three-dimensional stability of the magnetic field looks like under temperature fluctuations. This data can be used to create a feedback loop that corrects for the magnetic field drift and eventually results in better image reconstruction.Show less

Leiden University Student Repository

Documents

In Collections

Monitoring B0 field drift due to changes in environment temperature in a low field permanent magnet based MRI scanner