Magnetic resonance-guided vascular catheterization: Feasibility using a passive tracking technique at 0.2 telsa in a pig model

Wacker, Frank; Reither, Klaus; Branding, Gordian; Wolf, Karl‐Jürgen

doi:10.1002/(sici)1522-2586(199911)10:5<841::aid-jmri32>3.0.co;2-p

Cited by 21 publications

(5 citation statements)

References 21 publications

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“…The catheter position and the target volume perfusion could be verified under MRI. Since LITT was performed in an open MR system, even simple catheter corrections, which have not yet been necessary in our patients, may be performed under MRI guidance (23, 24).…”

Section: Discussionmentioning

confidence: 99%

MR-guided interstitial laser-induced thermotherapy of hepatic metastasis combined with arterial blood flow reduction: Technique and first clinical results in an open MR system

Wacker

Reither

Ritz

et al. 2001

J. Magn. Reson. Imaging

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The feasibility and safety of percutaneous laser‐induced thermotherapy (LITT) of liver metastases in an open low‐field magnetic resonance imaging (MRI) system combined with microsphere‐modulated blood flow reduction were tested. Nd:YAG laser therapy with an internally cooled laser applicator was performed under local anesthesia on 20 patients with 34 liver metastases. To increase the effectivenes of LITT, degradable starch microspheres were injected into the proper hepatic artery through an MR‐visible catheter initially inserted under fluoroscopy. Near real‐time imaging was used for positioning the laser applicator. A T1‐weighted gradient‐echo breath‐hold sequence was used for catheter localization and temperature monitoring. The volumes of the liver metastases and the thermonecroses were determined. MRI‐guided LITT could be performed in all patients with no clinically relevant complications. Intraprocedural imaging underestimated the extent of thermonecrosis. In conclusion, percutaneous LITT of liver metastases after injection of starch microspheres is both technically feasible and safe in an open MRI system. J. Magn. Reson. Imaging 2001;13:31–36. © 2001 Wiley‐Liss, Inc.

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Section: Discussionmentioning

confidence: 99%

MR-guided interstitial laser-induced thermotherapy of hepatic metastasis combined with arterial blood flow reduction: Technique and first clinical results in an open MR system

Wacker

Reither

Ritz

et al. 2001

J. Magn. Reson. Imaging

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“…To detect interventional instruments on MR images, markers can be attached that either amplify or reduce the MR signal. To create a negative contrast small paramagnetic rings or magnetite mixtures have been applied (28,29) (Fig. 2), whereas a positive contrast has been achieved with paramagnetic contrast agents in the catheter lumen (30) or on the surface of the catheter (31,32).…”

Section: Mr-visible Markersmentioning

confidence: 99%

MR‐guided intravascular interventions: Techniques and applications

Bock

Wacker

2008

Magnetic Resonance Imaging

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Magnetic resonance imaging (MRI) offers several advantages over other imaging modalities that make it an attractive imaging tool for diagnostic and therapeutic procedures. This tremendous potential of MRI has provided the rationale for increased attention toward MR-guided endovascular interventions. MR guidance has been used recently to navigate endovascular catheters and deliver stents, vena cava filters, embolization materials, and septum closure devices. However, its potential goes beyond just copying existing procedures toward the development of new minimally invasive techniques that cannot be performed with conventional guiding techniques. Because of technical limitations and safety issues associated with some of the currently available devices, a limited number of clinical studies have been performed so far. The overall success for this developing field requires considerable interdisciplinary research within both the interventional and the MR community. Only through a combined effort can this complex technology find its way into clinical practice. This review discusses the hardware and software improvements that have helped to advance endovascular interventions under MR imaging guidance from a pure research tool to become a clinical reality. In addition, technical and safety issues specific to endovascular MR image guidance will be described and practical applications will be shown that take advantage of the benefits of MR for endovascular interventions.

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“…Tracking with negative contrast global detection at low-field strength was demonstrated in an animal model by Wacker et al Catheters prepared with a ferrite mixture were introduced into the aorta of a pig and subsequently advanced into the splenic and renal arteries (Wacker et al 1999). The authors concluded that although catheter placement is faster and more reliable using conventional x-ray fluoroscopy, it is feasible using global detection (passive) tracking MRI techniques, which could have additional value in specific clinical applications such as tumour-embolization.…”

Section: Visualization Of Vessels and Devicesmentioning

confidence: 99%

Endovascular interventional magnetic resonance imaging

Bartels

Bakker

2003

Phys. Med. Biol.

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Minimally invasive interventional radiological procedures, such as balloon angioplasty, stent placement or coiling of aneurysms, play an increasingly important role in the treatment of patients suffering from vascular disease. The non-destructive nature of magnetic resonance imaging (MRI), its ability to combine the acquisition of high quality anatomical images and functional information, such as blood flow velocities, perfusion and diffusion, together with its inherent three dimensionality and tomographic imaging capacities, have been advocated as advantages of using the MRI technique for guidance of endovascular radiological interventions. Within this light, endovascular interventional MRI has emerged as an interesting and promising new branch of interventional radiology. In this review article, the authors will give an overview of the most important issues related to this field. In this context, we will focus on the prerequisites for endovascular interventional MRI to come to maturity. In particular, the various approaches for device tracking that were proposed will be discussed and categorized. Furthermore, dedicated MRI systems, safety and compatibility issues and promising applications that could become clinical practice in the future will be discussed.

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Magnetic resonance-guided vascular catheterization: Feasibility using a passive tracking technique at 0.2 telsa in a pig model

Cited by 21 publications

References 21 publications

MR-guided interstitial laser-induced thermotherapy of hepatic metastasis combined with arterial blood flow reduction: Technique and first clinical results in an open MR system

MR-guided interstitial laser-induced thermotherapy of hepatic metastasis combined with arterial blood flow reduction: Technique and first clinical results in an open MR system

MR‐guided intravascular interventions: Techniques and applications

Endovascular interventional magnetic resonance imaging

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