Intravascular magnetic resonance imaging using a loopless catheter antenna

Ocali, Ogan; Atalar, Ergin

doi:10.1002/mrm.1910370116

Cited by 229 publications

(204 citation statements)

References 13 publications

Supporting

Mentioning

203

Contrasting

Unclassified

Order By: Relevance

“…There are various types of disposable internal coils, such as opposed solenoids (3,4), expandable coils (5-8), elongated loops (9), and loopless antennas (10), for use in various body cavities, including the vagina, esophagus (11), urethra (12), blood vessels (10,13), and rectum (14). Although the SNR of MRI images increases when these coils are used, it is not possible to directly compare the performance of the internal coils with that of the external coils.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of internal MRI coils using ultimate intrinsic SNR

Çelik

Eryaman

Altintas

et al. 2004

Magnetic Resonance in Med

Self Cite

View full text Add to dashboard Cite

The upper bounds of the signal-to-noise ratio (also known as the "ultimate intrinsic signal-to-noise ratio" (UISNR)) for internal and external coils were calculated. In the calculation, the body was modeled as a dielectric cylinder with a small coaxial cylindrical cavity in which internal coils could be placed. The calculated UISNR values can be used as reference solutions to evaluate the performance of internal MRI coils. As examples, we evaluated the performance of a loopless antenna and an endourethral coil design by comparing their ISNR with the UISNR. Magn Reson Med 52:640 -649, 2004.

show abstract

mentioning

confidence: 99%

“…The results were used to measure the performance of a loopless antenna (10) and an endourethral coil (12) in the cavity.…”

mentioning

confidence: 99%

Evaluation of internal MRI coils using ultimate intrinsic SNR

Çelik

Eryaman

Altintas

et al. 2004

Magnetic Resonance in Med

Self Cite

View full text Add to dashboard Cite

show abstract

“…With use of a mechanically extended RF coil (48) or by implementation of a longitudinal dipole antenna (49,50) into the catheter instrument, the distal curvature or even the whole lengths of the device can be visualized (profiling) (Fig. 4).…”

Section: Tracking and Profiling Rf Coilsmentioning

confidence: 99%

MR‐guided intravascular interventions: Techniques and applications

Bock

Wacker

2008

Magnetic Resonance Imaging

View full text Add to dashboard Cite

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.

show abstract

“…However, it is important to visualize the length of the catheter, particularly in cardiac catheterization, to prevent the formation of undesired loops. Promising methods for visualizing the entire catheter length, or multiple points along the catheter, using loopless antennae (13,14) or parallel resonant circuits distributed along the length of the catheter (15) have been proposed recently. However, it remains to be demonstrated whether these designs are suitable in terms of safety and mechanical stability.…”

mentioning

confidence: 99%