Wireless Accelerometer for MRI-Guided Interventional Procedures

Abstract

MRI-guidance is increasingly used for minimally-invasive procedures, such as biopsy, and requires real-time active tracking of surgical instruments. Although optical and MR-based fiducial tracking devices have been used, these systems rely on complex contact with the operator or line-of-sight access for effective operation. A more straight-forward and clinically robust method is required to allow interactive real-time slice positioning of MR scan planes during interventional procedures. This study evaluated the use of a wristwatch-mounted, low cost wireless interface device for real-time MRI guidance. The device was designed to interact with software for planning rather than instrument guidance. The wireless device was integrated with two novel, open interventional magnet systems operating at 0.17T and 0.5T and utilized a novel customized graphic user interface (GUI) to assess interventional capability.

Characterization of a PXIe based low‐field digital NMR spectrometer

“…Upgrading the chassis to 8‐ports, and including three voltage control devices for X‐, Y‐, and Z‐ gradients, could theoretically transform the system into an imaging unit. At least two other low‐field MRI units have been described in the literature with LabVIEW control but we have not been able to find any detailed explanation of the programming flow. This could be at least in part derived from the increased coding challenge for a MRI spectrometer.…”

Wireless Accelerometer for Neonatal MRI Motion Artifact Correction

“…Angular accuracy and slice offset were previously assessed at 0.17T on a low field dedicated neonatal/extremity MRI system (Niche, Innervision MRI Ltd., Bradley, UK) using a customized quality assurance (QA) phantom [12].…”