MRI-Guided Microwave Ablation

Morikawa, Shigehiro; Naka, Shigeyuki; Murayama, Hiroyuki; Kurumi, Yoshimasa; Tani, Tohru; Haque, Hasnine A

doi:10.1007/174_2011_365

Cited by 6 publications

(2 citation statements)

References 26 publications

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“…However, these have the drawback of being invasive and capable of providing only local information, so that the adoption of noninvasive monitoring techniques would be advisable. In particular, magnetic resonance [6] and ultrasound [4] imaging have been proposed in the literature (and tested in the clinics) to tackle this issue. However, besides electromagnetic compatibility issues, magnetic resonance involves high cost equipment with obvious drawbacks in terms of economic sustainability, whereas the actual effectiveness of ultrasounds when temperature increases is still an open issue, since transducers are blinded by a hyperechogenic cloud caused by water vaporization as temperature increases up to about 100 ∘ C. The above reported limitations of existing imaging modalities motivate the interest in alternative techniques, and a possible candidate in this respect is microwave tomography (MWT), which images the electromagnetic properties of the tissue using low-cost and portable equipment.…”

Section: Introductionmentioning

confidence: 99%

Exploiting Microwave Imaging Methods for Real-Time Monitoring of Thermal Ablation

Scapaticci

Bellizzi

Cavagnaro

et al. 2017

International Journal of Antennas and Propagation

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Microwave thermal ablation is a cancer treatment that exploits local heating caused by a microwave electromagnetic field to induce coagulative necrosis of tumor cells. Recently, such a technique has significantly progressed in the clinical practice. However, its effectiveness would dramatically improve if paired with a noninvasive system for the real-time monitoring of the evolving dimension and shape of the thermally ablated area. In this respect, microwave imaging can be a potential candidate to monitor the overall treatment evolution in a noninvasive way, as it takes direct advantage from the dependence of the electromagnetic properties of biological tissues from temperature. This paper explores such a possibility by presenting a proof of concept validation based on accurate simulated imaging experiments, run with respect to a scenario that mimics an ex vivo experimental setup. In particular, two model-based inversion algorithms are exploited to tackle the imaging task. These methods provide independent results in realtime and their integration improves the quality of the overall tracking of the variations occurring in the target and surrounding regions.

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Section: Introductionmentioning

confidence: 99%

Exploiting Microwave Imaging Methods for Real-Time Monitoring of Thermal Ablation

Scapaticci

Bellizzi

Cavagnaro

et al. 2017

International Journal of Antennas and Propagation

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“…The success of MWA depends in part on the ability to accurately monitor the evolution of the ablation zone during the therapy procedure. Magnetic resonance imaging (MRI) [4] and ultrasound imaging [5] have been explored as MWA monitoring modalities. However, MRI has several drawbacks in terms of cost and concerns about heating MR contrast agents [6].…”

Section: Introductionmentioning

confidence: 99%

TDOA-based microwave imaging algorithm for real-time microwave ablation monitoring

Kidera

Neira

Veen

et al. 2017

Int. J. Microw. Wireless Technol.

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Microwave ablation is widely recognized as a promising minimally invasive tool for treating cancer. Real-time monitoring of the dimensions of the ablation zone is indispensable for ensuring an effective and safe treatment. In this paper, we propose a microwave imaging algorithm for monitoring the evolution of the ablation zone. Our proposed algorithm determines the boundary of the ablation zone by exploiting the time difference of arrival (TDOA) between signals received before and during the ablation at external antennas surrounding the tissue, using the interstitial ablation antenna as the transmitter. A significant advantage of this method is that it requires few assumptions about the dielectric properties of the propagation media. Also the simplicity of the signal processing, wherein the TDOA is determined from a cross-correlation calculation, allows real-time monitoring and provides robust performance in the presence of noise. We investigate the performance of this approach for the application of breast tumor ablation. We use simulated array measurements obtained from finite-difference time-domain simulations of magnetic resonance imaging-derived numerical breast phantoms. The results demonstrate that our proposed method offers the potential to achieve millimeter-order accuracy and real-time operation in estimating the boundary of the ablation zone in heterogeneous and dispersive breast tissue.

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MRI-Guided Thermal Ablation Techniques

Stafford

Ahrar

2012

Interventional Magnetic Resonance Imaging

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MRI-Guided Microwave Ablation

Cited by 6 publications

References 26 publications

Exploiting Microwave Imaging Methods for Real-Time Monitoring of Thermal Ablation

Exploiting Microwave Imaging Methods for Real-Time Monitoring of Thermal Ablation

TDOA-based microwave imaging algorithm for real-time microwave ablation monitoring

MRI-Guided Thermal Ablation Techniques

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