Forward-looking intravascular orthogonal-solenoid coil for imaging and guidance in occlusive arterial disease.
Recent intravascular imaging coil configurations have focused on side-viewing catheters capable of imaging the vessel wall of a patent vessel. These designs suffer from the presence of signal nulls and the inability to image in front of a device when it is oriented along the main static field. This is of particular importance when a device is being navigated through an occlusive lesion. To address these limitations we propose a new intravascular coil design consisting of two independent orthogonal solenoids located at the catheter tip. The two coils are oriented in such a way that signal nulls are eliminated and imaging is possible in planes located directly in front of the catheter. Complete characterization of the spatial signal-to-noise ratio (SNR) distribution of the design is presented. The coil configuration was fabricated on a 6F guide catheter, and its use is demonstrated in phantoms and in vivo.
Anderson
Kevan J T
KJ
Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada. kanders@sri.utoronto.ca
Leung
General
G
Dick
Alexander J
AJ
Wright
Graham A
GA
D000818:Animals; D001157:Arterial Occlusive Diseases / Q000175:diagnosis*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006801:Humans; D007089:Image Enhancement / Q000295:instrumentation*; D008279:Magnetic Resonance Imaging / Q000295:instrumentation* / Q000379:methods; D008280:Magnetics / Q000295:instrumentation*; D019047:Phantoms, Imaging; D025321:Surgery, Computer-Assisted / Q000295:instrumentation* / Q000379:methods; D013552:Swine; D014159:Transducers