Preparation of an Au-Pt alloy free from artifacts in magnetic resonance imaging

When magnetic resonance imaging (MRI) is performed on patients carrying metallic implants, artifacts can disturb the images around the implants, often making it difficult to interpret them appropriately. However, metallic materials are and will be indispensable as raw materials for medical devices b...

Full description

Saved in:
Bibliographic Details
Published inMagnetic resonance imaging Vol. 44; pp. 38 - 45
Main Authors Kodama, Tomonobu, Nakai, Ryusuke, Goto, Kenji, Shima, Kunihiro, Iwata, Hiroo
Format Journal Article
LanguageEnglish
Published Netherlands Elsevier Inc 01.12.2017
Subjects
Alloy
Alloys - chemistry
Electric Conductivity
Electrodes
Fluoroscopy
Gold - chemistry
Humans
Intracranial Aneurysm - diagnostic imaging
Magnetic Resonance Imaging - instrumentation
Magnetic susceptibility
Magnetics
Metal artifact
Metals
Platinum - chemistry
Prostheses and Implants
Susceptibility artifact
X-Rays
Metal artifact
Alloy
Magnetic susceptibility
Susceptibility artifact
Online AccessGet full text

Cover

More Information
Summary:When magnetic resonance imaging (MRI) is performed on patients carrying metallic implants, artifacts can disturb the images around the implants, often making it difficult to interpret them appropriately. However, metallic materials are and will be indispensable as raw materials for medical devices because of their electric conductivity, visibility under X-ray fluoroscopy, and other favorable features. What is now desired is to develop a metallic material which causes no artifacts during MRI. In the present study, we prepared a single-phase and homogeneous Au-Pt alloys (Au; diamagnetic metal, and Pt; paramagnetic metal) by the processing of thermal treatment. Volume magnetic susceptibility was measured with a SQUID Flux Meter and MRI artifact was evaluated using a 1.5-T scanner. After final thermal treatment, an entirely recrystallized homogeneous organization was noted. The Au-35Pt alloy was shown to have a volume magnetic susceptibility of −8.8ppm, causing almost free from artifacts during MRI. We thus prepared an Au-35Pt alloy which had a magnetic susceptibility very close to that of living tissue and caused much fewer artifacts during MRI. It is promising as a material for spinal cages, intracranial electrodes, cerebral aneurysm embolization coils, markers for MRI and so on.
ISSN:0730-725X
1873-5894
DOI:10.1016/j.mri.2017.07.006