Meeting Banner
Abstract #1812

An Adaptive MR-Compatible Lens

Julian Maclaren1, Florian Schneider2, Michael Herbst1, Murat Aksoy3, Daniel Kopeinigg3, Juergen Hennig1, Roland Bammer3, Maxim Zaitsev1, Ulrike Wallrabe2

1Medical Physics, Dept. of Radiology, University Medical Center Freiburg, Freiburg, Germany; 2Dept. of Microsystems Engineering - IMTEK, University of Freiburg, Freiburg, Germany; 3Dept. of Radiology, Stanford University, Stanford, United States

MR-compatible camera systems are used for head tracking, eye tracking, and in interventional MRI. However, a limited depth of focus and small field of view provide a challenge for in-bore cameras, particular if the goal is to monitor a moving subject. In this work we present an MR-compatible adaptive lens and objective. Focusing on a checkerboard tracking target is demonstrated during simultaneous MR imaging. RF interference tests and field distortion measurements indicate excellent compatibility with the MR system.