Single‐loop coil concepts for intravascular magnetic resonance imaging

Quick, Harald H.; Ladd, Mark E.; Zimmermann‐Paul, Gesine G.; Erhart, Peter; Hofmann, E.; Schulthess, Gustav K. von; Debatin, Jörg F.

doi:10.1002/(sici)1522-2594(199904)41:4<751::aid-mrm14>3.3.co;2-m

Cited by 13 publications

(14 citation statements)

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“…This eliminated susceptibility artifacts in the region of interest (ROI) because local tuning and matching were accomplished with only NPO capacitors. It also enabled remote fine-tuning of the probe without sacrificing signal-to-noise ratio (16,17).…”

Section: Customized Small Animal Coilmentioning

confidence: 99%

Dual in vivo magnetic resonance evaluation of magnetically labeled mouse embryonic stem cells and cardiac function at 1.5 t

Arai

Kofidis

Bulte

et al. 2005

Magnetic Resonance in Med

106

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Section: Customized Small Animal Coilmentioning

confidence: 99%

Dual in vivo magnetic resonance evaluation of magnetically labeled mouse embryonic stem cells and cardiac function at 1.5 t

Arai

Kofidis

Bulte

et al. 2005

Magnetic Resonance in Med

106

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“…In vessels with atherosclerotic plaques interventional MRI has the potential to visualize the morphology of both the vessel wall and the surrounding tissue (2,9,19,(21)(22)(23)(24)(25), whereas conventional angiography is only able to delineate the vessel lumen. The advantages of this information are clear when one considers that the dangers associated with atherosclerosis are not only caused by luminal narrowing but are also dependent on the structure of the vessel wall.…”

Section: Endovascular Interventionsmentioning

confidence: 99%

“…An advantage of utilizing microcoils is the possibility to use the MR signal not only for instrument tracking but also for endovascular imaging or functional studies (19,(23)(24)(25). If, for example, the signals of two solenoid coils are combined, both tracking of the catheter as well as high-resolution imaging of the vessel wall is possible (9,54).…”

Section: Tracking and Profiling Rf Coilsmentioning

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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“…Early work in MR emphasized the fundamental importance of probe integrity (tuning and matching) in achieving a high signal-to-noise ratio (SNR) (10). Several investigators have examined and identified the key tradeoffs for the remote tuning and matching of probes with respect to image quality (11)(12)(13)(14). Tuning is necessary, but it is time-consuming and difficult.…”

mentioning

confidence: 99%

Automatic tuning of flexible interventional RF receiver coils

Venook

Hargreaves

Gold

et al. 2005

Magnetic Resonance in Med

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1Microcontroller-based circuitry was built and tested for automatically tuning flexible RF receiver coils at the touch of a button. This circuitry is robust to 10% changes in probe center frequency, is in line with the scanner, and requires less than 1 s to tune a simple probe. Images were acquired using this circuitry with a varactor-tunable 1-inch flexible probe in a phantom and in an in vitro porcine knee model. The phantom experiments support the use of automatic tuning by demonstrating 30% signal-to-noise ratio (SNR) losses for 5% changes in coil center frequency, in agreement with theoretical calculations. Comparisons between patellofemoral cartilage images obtained using a 3-inch surface coil and the surgically-

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Single‐loop coil concepts for intravascular magnetic resonance imaging

Cited by 13 publications

References 0 publications

Dual in vivo magnetic resonance evaluation of magnetically labeled mouse embryonic stem cells and cardiac function at 1.5 t

Dual in vivo magnetic resonance evaluation of magnetically labeled mouse embryonic stem cells and cardiac function at 1.5 t

MR‐guided intravascular interventions: Techniques and applications

Automatic tuning of flexible interventional RF receiver coils

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