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Electron spin resonance (ESR) probe for interventional MRI instrument localization
Author(s) -
J. Ehnholm Gösta,
Vahala Erkki T.,
Kinnunen Jaakko,
Nieminen Jukka E.,
StandertskjöldNordenstam C.G. M.,
Uusitalo Mikko A.
Publication year - 1999
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/(sici)1522-2586(199908)10:2<216::aid-jmri17>3.0.co;2-n
Subject(s) - artifact (error) , position (finance) , magnetic resonance imaging , electron paramagnetic resonance , nuclear magnetic resonance , physics , electron , materials science , radiology , medicine , computer science , computer vision , finance , economics , quantum mechanics
This article presents a miniaturized electron spin resonance (ESR) probe for deducing the position of a surgical instrument on an MR image. The ESR probe constructed was small enough to fit inside a 14‐G biopsy needle sheath, and position information of the sheath could be acquired using a simple gradient sequence. The position accuracy was estimated from needle trajectories as inferred from the needle artifact, the actual physical trajectory, and measured coordinates. The probe was able to track the tip of a biopsy needle quickly (10 samples/sec) and precisely with accuracy better than ±2 mm. J. Magn. Reson. Imaging 1999;10:216–219. © 1999 Wiley‐Liss, Inc.