News Column

Report Summarizes Vascular and Interventional Radiology Study Findings from University of California

May 30, 2014

By a News Reporter-Staff News Editor at Health & Medicine Week -- A new study on Medical Imaging is now available. According to news reporting from San Francisco, California, by NewsRx journalists, research stated, "To evaluate deflection capability of a prototype endovascular catheter, which is remotely magnetically steerable, for use in the interventional magnetic resonance (MR) imaging environment. Copper coils were mounted on the tips of commercially available 2.3-3.0-F microcatheters."

The news correspondents obtained a quote from the research from the University of California, "The coils were fabricated in a novel manner by plasma vapor deposition of a copper layer followed by laser lithography of the layer into coils. Orthogonal helical (ie, solenoid) and saddle-shaped (ie, Helmholtz) coils were mounted on a single catheter tip. Microcatheters were tested in water bath phantoms in a 1.5-T clinical MR scanner, with variable simultaneous currents applied to the coils. Catheter tip deflection was imaged in the axial plane by using a 'real-time' steady-state free precession MR imaging sequence. Degree of deflection and catheter tip orientation were measured for each current application. The catheter tip was clearly visible in the longitudinal and axial planes. Magnetic field artifacts were visible when the orthogonal coils at the catheter tip were energized. Variable amounts of current applied to a single coil demonstrated consistent catheter deflection in all water bath experiments. Changing current polarity reversed the observed direction of deflection, whereas current applied to two different coils resulted in deflection represented by the composite vector of individual coil activations. Microcatheter navigation through the vascular phantom was successful through control of applied current to one or more coils."

According to the news reporters, the research concluded: "Controlled catheter deflection is possible with laser lithographed multiaxis coil-tipped catheters in the MR imaging environment."

For more information on this research see: Magnetic catheter manipulation in the interventional MR imaging environment. Journal of Vascular and Interventional Radiology, 2013;24(6):885-91 (see also Medical Imaging).

Our news journalists report that additional information may be obtained by contacting M.W. Wilson, Dept. of Radiology and Biomedical Imaging, University of California, San Francisco, CA 94107, United States. Additional authors for this research include A.B. Martin, P. Lillaney, A.D. Losey, E.J. Yee, A. Bernhardt, V. Malba, L. Evans, R. Sincic, M. Saeed, R.L. Arenson and S.W Hetts.

Keywords for this news article include: California, San Francisco, United States, Medical Imaging, North and Central America.

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Source: Health & Medicine Week

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