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Radiation Protection Dosimetry Advance Access published online on February 7, 2006
Radiation Protection Dosimetry, doi:10.1093/rpd/nci731
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© The Author 2006. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Leuvens Special Issue Article

INTERVENTIONAL MAGNETIC RESONANCE IMAGING: AN ALTERNATIVE TO IMAGE GUIDANCE WITH IONISING RADIATION

M. Bock 1 *, R. Umathum 1, S. Zuehlsdorff 2, S. Volz 1, C. Fink 1, P. Hallscheidt 1, H. Zimmermann 1, W. Nitz 2, and W. Semmler 1

1 Deutsches Krebsforschungszentrum (dkfz), Abt. Medizinische Physik in der Radiologie (E020), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
2 Siemens Medical Solutions, Karl-Schall-Strasse 6, 91052 Erlangen, Germany

* To whom correspondence should be addressed.
M. Bock, E-mail: M.Bock{at}dkfz.de


  Abstract

At present, interventional procedures, such as stent placement, are performed under X-ray image guidance. Unfortunately with X-ray imaging, both patient and interventionalist are exposed to ionising radiation. Furthermore, X-ray imaging is lacking soft tissue contrast and is not capable of true 3-D displays of either interventional device or tissue morphology. Magnetic resonance imaging (MRI) offers excellent soft tissue contrast, 3-D acquisition techniques, as well as rapid image acquisition and reconstruction. Despite these advantages, MR-guided interventions are challenging owing to the limited access to the patient, strong magnetic and radio-frequency fields that require special interventional devices, inferior image frame rates and spatial resolution, and high MRI scanner noise. For MR-guided intravascular interventions, where access to the target organ is achieved through catheters, dedicated hardware and automated image slice positioning techniques have been developed. We illustrate that MR-guided renal embolisations can be performed in closed-bore high-field MR scanners.


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