Title :
An adaptive objective for optical motion correction in MRI
Author :
Schneider, F. ; Draheim, J. ; Burger, T. ; Maclaren, J. ; Herbst, M. ; Zaitsev, M. ; Bammer, R. ; Wallrabe, U.
Author_Institution :
Dept. of Microsyst. Eng., Univ. of Freiburg, Freiburg, Germany
Abstract :
We present an adaptive membrane lens that is compatible with a magnetic resonance (MR) imaging system, as a part of an objective for in-bore optical motion tracking and correction. Compatibility tests with the high magnetic fields of a 3 T scanner and the shielding of the adaptive lens are discussed. For tracking of a marker an adaptive wide-angle objective has been designed and characterised. The measured mean distortions of the objective are between -2.05 and -2.6 %. The tracking system was verified in a MR scanner model.
Keywords :
adaptive optics; biomedical MRI; lenses; MRI; adaptive membrane lens; adaptive objective; compatibility tests; magnetic resonance imaging; optical motion correction; shielding; Adaptive optics; Distortion measurement; Head; Lenses; Optical distortion; Target tracking;
Conference_Titel :
Optical MEMS and Nanophotonics (OPT MEMS), 2010 International Conference on
Conference_Location :
Sapporo
Print_ISBN :
978-1-4244-8926-8
Electronic_ISBN :
978-1-4244-8925-1
DOI :
10.1109/OMEMS.2010.5672120
