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A Study of the Use of Overhauser Enhancement to Assist with Needle and Catheter Placement during Interventional MRI

✍ Scribed by Erkki Vahala; Mika Ylihautala; Gösta Ehnholm; Nina Etelä; Ian Young; Klaes Golman; Ib Leunbach

Publisher: Elsevier Science
Year: 2002
Tongue: English
Weight: 193 KB
Volume: 157
Category: Article
ISSN: 1090-7807
DOI: 10.1006/jmre.2002.2595

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✦ Synopsis

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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