ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
A better understanding of the appearance of a biopsy needle and its image artifacts as well as its interaction with various sequence parameters in magnetic resonance (MR) imaging is beneficial for its application in MR image guided surgical procedures. A standard analytical solution to an infinite long cylindrically shaped object immersed in a uniform magnetic field has been used to predict MR image artifacts. In a more practical setting, we investigated 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 origin of the needle tip artifact, which is exhibited as a blooming ball, was studied using MR imaging techniques and numerical simulation employing finite element method. Satisfactory agreement between theory and experiment has been achieved. Results showed that the image artifacts associated with biopsy needle are present and dependent on MR imaging parameters, but the artifacts can be reduced if optimal imaging parameters were used. © 1998 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.367720
