TY - JOUR
T1 - MRI of hip prostheses using single-point methods : in vitro studies towards the artifact-free imaging of individuals with metal implants
AU - Ramos Cabrer, P.
AU - Duynhoven, van, J.P.M.
AU - Toorn, van der, A.
AU - Nicolaij, K.
PY - 2004
Y1 - 2004
N2 - Use of magnetic resonance imaging (MRI) in individuals with orthopedic implants is limited because of the large distortions caused by metallic components. As a possible solution for this problem, we suggest the use of single-point imaging (SPI) methods, which are immune to the susceptibility artifacts observed with conventional MRI methods. A further advantage of SPI, based on the fact that signal encoding is achieved in ultra-short times (as short as tens of microseconds), is that they enable the direct visualization of the polymeric elements of the implants, allowing the detection of possible implant failures. We present in vitro SPI images of polymeric sockets of two hip prostheses together with artifact-free images of gelatin phantoms containing their respective metallic stems. These data underscore the great potential of the SPI technique for obtaining artifact-free images of individuals with large metal implants.
AB - Use of magnetic resonance imaging (MRI) in individuals with orthopedic implants is limited because of the large distortions caused by metallic components. As a possible solution for this problem, we suggest the use of single-point imaging (SPI) methods, which are immune to the susceptibility artifacts observed with conventional MRI methods. A further advantage of SPI, based on the fact that signal encoding is achieved in ultra-short times (as short as tens of microseconds), is that they enable the direct visualization of the polymeric elements of the implants, allowing the detection of possible implant failures. We present in vitro SPI images of polymeric sockets of two hip prostheses together with artifact-free images of gelatin phantoms containing their respective metallic stems. These data underscore the great potential of the SPI technique for obtaining artifact-free images of individuals with large metal implants.
U2 - 10.1016/j.mri.2004.01.061
DO - 10.1016/j.mri.2004.01.061
M3 - Article
C2 - 15527996
SN - 0730-725X
VL - 22
SP - 1097
EP - 1103
JO - Magnetic Resonance Imaging
JF - Magnetic Resonance Imaging
IS - 8
ER -