Relationship of magnetic moment of metallic alloys to image artifact during magnetic resonance imaging

Andrew A. Zwarun; Antony J. Bourdillon; Terry M. Button; Marali Chaparali; Dan J. Castro

doi:10.1117/12.137517

1 June 1992 Relationship of magnetic moment of metallic alloys to image artifact during magnetic resonance imaging

Andrew A. Zwarun, Antony J. Bourdillon, Terry M. Button, Marali Chaparali, Dan J. Castro

Proceedings Volume 1650, Medical Lasers and Systems; (1992) https://doi.org/10.1117/12.137517
Event: OE/LASE '92, 1992, Los Angeles, CA, United States

Abstract

The embryonic area of interventional MRI, i.e. interstitial therapy under MR guidance, includes deep tissue laser ablation of lesions. Laser fibers can be located inside lesions by first inserting an MR-compatible cannula into the lesion and then inserting the laser fiber through the cannula into the lesion. Two factors are critical in selecting alloys for cannulae: the material should exhibit so little magnetic susceptibility that it will neither distort the MR image nor torque even at high field strengths, yet it should exhibit enough susceptibility defect that the cannula can be visualized by MR during positioning. Wires of metals and alloys were tested in a magnetometer to measure their magnetic moment, and imaged with spin echo and gradient echo MRI. Direct measurement of magnetic moment was a good indicator of MR- compatibility. Artifacts visualized with spin echo pulse sequences were smaller than those produced with gradient echo sequences.

Citation Download Citation

Andrew A. Zwarun, Antony J. Bourdillon, Terry M. Button, Marali Chaparali, and Dan J. Castro "Relationship of magnetic moment of metallic alloys to image artifact during magnetic resonance imaging", Proc. SPIE 1650, Medical Lasers and Systems, (1 June 1992); https://doi.org/10.1117/12.137517

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available