Browse Prior Art Database

TECHNIQUE FOR IMPROVING MRI COMPATIBILITY OF DEVICES

IP.com Disclosure Number: IPCOM000199108D
Publication Date: 2010-Aug-26
Document File: 4 page(s) / 26K

Publishing Venue

The IP.com Prior Art Database

Abstract

A technique for improving Magnetic Resonance Imaging (MRI) compatibility of devices is disclosed. The technique improves matching in the magnetic susceptibility of the device used in the MRI scanner with that of the surroundings that are being imaged, such as tissue or blood. The materials introduced into the device have magnetic susceptibility such that when averaged with the magnetic susceptibility of other components of the device brings the overall average magnetic susceptibility closer to that of tissue or blood. Thus the present invention enables more flexibility in the choice of materials used for the devices thereby, improves the MRI compatibility of the devices.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 56% of the total text.

Page 1 of 4

RP13477

TECHNIQUE FOR IMPROVING MRI COMPATIBILITY OF DEVICES

BRIEF ABSTRACT

    A technique for improving Magnetic Resonance Imaging (MRI) compatibility of devices is disclosed. The technique improves matching in the magnetic susceptibility of the device used in the MRI scanner with that of the surroundings that are being imaged, such as tissue or blood. The materials introduced into the device have magnetic susceptibility such that when averaged with the magnetic susceptibility of other components of the device brings the overall average magnetic susceptibility closer to that of tissue or blood. Thus the present invention enables more flexibility in the choice of materials used for the devices thereby, improves the MRI compatibility of the devices.

KEYWORDS

Magnetic susceptibility, Magnetic Resonance Imaging and catheters

DETAILED DESCRIPTION

    Magnetic Resonance Imaging (MRI) is a promising imaging technique that provides superior soft tissue contrast and multi planar real-time imaging without harmful ionizing radiation for therapeutic procedures. In recent years Interventional magnetic resonance imaging (iMRI) has gained important popularity in many fields such as interventional cardiology and radiology, due to the development of minimally invasive techniques and visible catheters under MRI for conducting MRI-guided procedures and therapies. For interventional MRI, MRI compatible catheters are used which overcomes the concern of patient/sample heating associated with the design of conventional active MRI catheters. However, selected materials, whose magnetic susceptibility is as

1

Page 2 of 4

RP13477

close as that of tissue and blood, are only used in the catheters. This puts severe constraints on selecting the materials.

    Therefore, there is a need in the art for a method to improve MRI compatibility of devices with significantly relaxed requirements on material choices for other parts of the device.

    A key aspect of making a device MRI compatible is the material properties of the components of the device. The central property relevant for MRI compatibility is the magnetic susceptibility, which describes the tendency of a material to have a magnetization induced in it by an applied magnetic field. The magnetic susceptibility can be positive or negative. There is a large mismatch in the magnetic susceptibility between a device and its surroundings....