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Biopsy needle tip artifact in MR-guided neurosurgery by Haiying Liu; Walter A. Hall; Alastair J. Martin; Charles L. Truwit is a Medicine article available to read on EtoBox.

What is Biopsy needle tip artifact in MR-guided neurosurgery about?

A thorough understanding of both the appearance and origin of metallic biopsy needle tip artifact in magnetic resonance imaging (MRI) as well as its interaction with various magnetic resonance (MR) sequence parameters is beneficial for its application in today's MR-guided therapeutic procedures. In a more practical setting, this investigation has focused on the characteristics of MR image artifacts associated with a finite-length metallic needle, specifically at the tip of a biopsy needle when it is approximately parallel to the main magnetic field. The image artifact at needle tip, which exhibits as a blooming ball-shaped signal void, was demonstrated and studied using MR imaging and numerical simulation employing the finite difference method (FDM). In order to understand the origin of this image artifact, a numerical model or simulation software based on the FDM has been developed specifically to solve for the field disturbance to a uniform magnetic field due to a finite-length metallic needle. The solution for magnetic field shows that the field disturbance is spatially localized at the needle tip. From the numerical results, simulated images were generated which were in a very

Who reads Biopsy needle tip artifact in MR-guided neurosurgery?

Author

Haiying Liu; Walter A. Hall; Alastair J. Martin; Charles L. Truwit

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 1053-1807)

Published

2001

Language

EN

Field

Medicine (Health Sciences)