Cancellation of metal‐induced MRI artifacts with dual‐component paramagnetic and diamagnetic material: Mathematical modelization and experimental verification

Chauvel, Brice; Cathelineau, Guy; Balac, Stéphane; Lecerf, Jean; Certaines, Jacques D. de

doi:10.1002/jmri.1880060615

Cited by 15 publications

(11 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…With regard to manipulatable objects, efforts have almost exclusively been directed toward developing materials with susceptibilities that are sufficiently close to the tissue within which they are used. This approach has led to the development of materials with magnetic compatibility of the so‐called first and second kinds (2), including dedicated biopsy needles, stereotactic frames, implants, and surgical instruments (11–15).…”

mentioning

confidence: 99%

Concerning the preparation and use of substances with a magnetic susceptibility equal to the magnetic susceptibility of air

Bakker¹,

Roos²

2006

Magnetic Resonance in Med

View full text Add to dashboard Cite

In this work it is demonstrated that the susceptibility of diamagnetic substances, such as water and agarose gel, can easily be tuned to the susceptibility of air by the addition of a proper amount of strongly paramagnetic ions, in this case 16.6 ؎ 0.1 mM holmium(III). The resultant air-equivalent substances are shown to allow the creation of objects that do not disturb the static magnetic field of the scanner and hence do not invoke susceptibility artifacts, regardless of the objects' shape, size, and orientation with respect to B 0 , and regardless of the pulse sequence being used. The addition of the proper amount of holmium(III) to aqueous solutions and gels is further shown to exert a negligible influence on the chemical shift and to cause a moderate increase of the relaxation rates 1/T 1 and 1/T 2 . The results indicate the potential of air-equivalent substances for many purposes, including construction of artifact-free test objects; experimental setups and accessory devices; investigation of systems that contain air cavities, gas bubbles, etc.; and monitoring of system-related and object-induced field disturbances.

show abstract

mentioning

confidence: 99%

Concerning the preparation and use of substances with a magnetic susceptibility equal to the magnetic susceptibility of air

Bakker¹,

Roos²

2006

Magnetic Resonance in Med

View full text Add to dashboard Cite

show abstract

“…In vivo experience of comparison between MR and Doppler guidewire exams for assessment of coronary blood flow (10) suggested study of the influence of stents as source of errors. A first approach consisted of mathematically modeling the modified magnetic field (11)(12)(13). The complex structure of stents and the modified shape during angioplasty do not allow a precise modeling.…”

Section: Discussionmentioning

confidence: 99%

Error assessment due to coronary stents in flow-encoded phase contrast MR angiography: a phantom study

Lethimonnier

Bouligand

Thouveny

et al. 1999

J. Magn. Reson. Imaging

View full text Add to dashboard Cite

“…Indeed, as is well known from the literature, iron-based ferromagnetic impurities are ubiquitous in most materials and can drastically modify the properties of materials [22], [49]. Furthermore, a small susceptibility mismatch could be cancelled using the dual-component method of Chauvel et al [50]. In this method, the global magnetic susceptibility of an object is optimized by combining a diamagnetic ( ) and a paramagnetic material (…”

Section: Discussionmentioning

confidence: 99%

Gamma shielding materials for MR-compatible PET

Strul

Cash

Keevil

et al. 2003

IEEE Trans. Nucl. Sci.

View full text Add to dashboard Cite

Abstract-As for standard positron emission tomography (PET) scanners, MR-compatible PET scanners will require gamma shielding to suppress the influence of activity outside the PET field of view (FOV). Suitable materials must have very specific properties, including magnetic properties close to those of water, high density, high atomic number, and ideally a low conductivity. In order to identify potential suitable materials, we have selected several heavy-metal-based candidates based on the available data for magnetic and shielding properties. These materials include several nonferromagnetic metals and metal oxides, two scintillating crystals (bismuth germanate and lead tungstate) and two metal/epoxy compounds. The magnetic resonance imaging (MRI) compatibility of these materials was assessed under various conditions, both on a human and a small-animal MRI scanner. In parallel, we assessed the shielding efficiency at 661 keV of the most promising candidates. These experiments showed that there is a range of possibilities for the design of MR-compatible gamma shields. Lead has acceptable magnetic compatibility but can induce significant conductivity-related artefacts. Heavy-metal-based minerals are fully insulating and hot-pressed lead monoxide showed good MR compatibility combined with good shielding properties. Other possibilities include the use of lead based powders and heavy-metal oxide composites.Index Terms-Magnetic resonance imaging (MRI), positron emission tomography (PET), shielding.

show abstract

Cancellation of metal‐induced MRI artifacts with dual‐component paramagnetic and diamagnetic material: Mathematical modelization and experimental verification

Cited by 15 publications

References 11 publications

Concerning the preparation and use of substances with a magnetic susceptibility equal to the magnetic susceptibility of air

Concerning the preparation and use of substances with a magnetic susceptibility equal to the magnetic susceptibility of air

Error assessment due to coronary stents in flow-encoded phase contrast MR angiography: a phantom study

Gamma shielding materials for MR-compatible PET

Contact Info

Product

Resources

About