Principles of Passive Visualization
Prerequisite to the safe execution of an interventional procedure is the ability to accurately visualize any instruments in relation to the MR image. These interventions might involve a percutaneous route, such as a biopsy, or endovascular or endoluminal access. In contrast to X-ray, visualization of interventional instruments in MR has proven to be difficult. Excellent contrast between the instrument and surrounding tissue can be obtained in X-ray through the use of high-atomic number metals such as gold or tungsten. These materials provide large attenuation of incident X-rays, rendering the instrument visible with high resolution.
KeywordsMagnetic Susceptibility Static Magnetic Field Magn Reson Image Signal Void Receiver Bandwidth
Unable to display preview. Download preview PDF.
- Callaghan PT (1991) Principles of nuclear magnetic resonance in microscopy. Oxford University Press, New YorkGoogle Scholar
- Glowinski A, Adam G, Bücker A, Neuerburg J, van Vaals JJ, Günther RW (1996) Catheter visualization for interventional MR by actively controlled locally induced field inhomogeneities. (abstract) Proceedings of Fourth Scientific Meeting and Exhibition of International Society for Magnetic Resonance in Medicine, New York, p 51Google Scholar
- Hohenschuh E, Watson AD (1997) Contrast media: theory and mechanisms of contrast-enhancing agents. In: Higgins CB, Hricak H, Helms CA (eds) Magnetic resonance imaging of the body, 3rd edn. Lippincott-Raven, Philadelphia, pp 1439–1464Google Scholar
- Kugel H, Langen HJ, Krähe T, Heindel W, Lackner K (1996) Precision of MR-guided needle placement — experimental results. MAGMA 4(2)[Suppl]:143–144Google Scholar
- Lenz G, Drobnitzky M, Dewey C (1996) MR-visible catheters for intra-vascular interventional MRI procedures. (abstract) Proceedings of Fourth Scientific Meeting and Exhibition of International Society of Magnetic Resonance in Medicine, New York, p 901Google Scholar
- Marshall SV, Skitek GG (1987) Electromagnetic concepts and applications, 2nd edn. Prentice-Hall, New JerseyGoogle Scholar
- van Sonnenberg E, Hajek P, Gylys-Morin V, Varney RA, Baker L, Casola G, Christensen R, Mattrey RF (1988) A wire-sheath system for MR-guided biopsy and drainage: laboratory studies and experience in 10 patients. AJR 151:815–817Google Scholar