Ultra-low field Magnetic Resonance Imaging using high-Tc SQUIDs

Examensarbete för masterexamen

Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.12380/163594
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dc.contributor.authorJönsson, Magnus
dc.contributor.departmentChalmers tekniska högskola / Institutionen för mikroteknologi och nanovetenskapsv
dc.contributor.departmentChalmers University of Technology / Department of Microtechnology and Nanoscienceen
dc.description.abstractA measurement system for ultra-low field Magnetic Resonance Imaging (ulf-MRI) has been built and programmed and a few proof-of- principle 2D images of water phantoms have been acquired at 89.3 μT measurement field. The smallest detectable volume of water has been de- termined to be 0.3 cm3. A single-shot NMR spectrum of a water sample has been detected and the signal-to-noise ratio of the resonant peak has been determined to be 60 with a linewidth of 0.9 Hz at 3.8 kHz. A few dif- ferent pulsing sequences have been tried and the most promising has been determined to be a prepolarization pulse that is turned off non-adiabatically. Some obstacles towards building a full-fledged ulf-MRI measurement sys- tem have been identified and partially addressed, such as the external mag- netic fluctuations of around 200 nT and that an unshielded SQUID detector has problems performing reliably after the prepolarization pulse.
dc.subjectMedicinsk apparatteknik
dc.subjectNanovetenskap och nanoteknik
dc.subjectLife Science
dc.subjectMedical Equipment Engineering
dc.subjectNanoscience & Nanotechnology
dc.titleUltra-low field Magnetic Resonance Imaging using high-Tc SQUIDs
dc.type.degreeExamensarbete för masterexamensv
dc.type.degreeMaster Thesisen
Collection:Examensarbeten för masterexamen // Master Theses

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