A study of the use of Overhauser enhancement to assist with needle and catheter placement during interventional MRI |
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Authors: | Vahala Erkki Ylihautala Mika Ehnholm Gösta Etelä Nina Young Ian Golman Klaes Leunbach Ib |
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Affiliation: | Philips Medical Systems MR Technologies Finland, Ltd. Vantaa, Finland. Erkki.Vahala@philips.com |
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Abstract: | The practicability of using Overhauser enhancement of saline in interventional MRI was investigated. Saline was used as a means of marking the path taken by a fluid-filled cavity, similar to that formed by a needle, catheter, or cannula during interventional MRI procedures. A prototype device was designed and constructed for saturation and propulsion of 0.6 ml of doped liquid. The pertinent Overhauser parameters, such as the obtainable enhancement factor, were measured. Signal enhancement in excess of 10 was demonstrated in practice by acquiring images showing an enhancement of fluid in a catheter tube. |
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Keywords: | Abbreviations: Overhauser enhancementAbbreviations: microwave polarizationAbbreviations: electron spin resonance (ESR)Abbreviations: interventional magnetic resonance imaging (IMRI)Abbreviations: catheter placement |
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