Simultaneous fat‐referenced proton resonance frequency shift thermometry and MR elastography for the monitoring of thermal ablations

Kim, Ki Soo; Breton, Élodie; Gangi, Afshin; Vappou, Jonathan

doi:10.1002/mrm.28130

Cited by 9 publications

(6 citation statements)

References 32 publications

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“…As with US elastography, tissue mechanical properties are derived from monitoring shear wave propagation or tissue displacement. The shear waves can be induced with an external driver, 184,185 a percutaneous needle 186 or an acoustic pulse (ARFI) 187 with the latter two of particular interest for monitoring thermal ablation. Chen et aldemonstrated that MRE is capable of measuring stiffness changes induced by LITT in a porcine liver in vivo.…”

Section: Magnetic Resonance Elastographymentioning

confidence: 99%

Methods of monitoring thermal ablation of soft tissue tumors – A comprehensive review

et al. 2022

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Thermal ablation is a form of hyperthermia in which oncologic control can be achieved by briefly inducing elevated temperatures, typically in the range 50-80 • C, within a target tissue. Ablation modalities include high intensity focused ultrasound, radiofrequency ablation, microwave ablation, and laser interstitial thermal therapy which are all capable of generating confined zones of tissue destruction, resulting in fewer complications than conventional cancer therapies. Oncologic control is contingent upon achieving predefined coagulation zones; therefore, intraoperative assessment of treatment progress is highly desirable. Consequently, there is a growing interest in the development of ablation monitoring modalities. The first section of this review presents the mechanism of action and common applications of the primary ablation modalities. The following section outlines the state-of -the-art in thermal dosimetry which includes interstitial thermal probes and radiologic imaging. Both the physical mechanism of measurement and clinical or pre-clinical performance are discussed for each ablation modality. Thermal dosimetry must be coupled with a thermal damage model as outlined in Section 4. These models estimate cell death based on temperature-time history and are inherently tissue specific. In the absence of a reliable thermal model, the utility of thermal monitoring is greatly reduced. The final section of this review paper covers technologies that have been developed to directly assess tissue conditions. These approaches include visualization of non-perfused tissue with contrast-enhanced imaging, assessment of tissue mechanical properties using ultrasound and magnetic resonance elastography, and finally interrogation of tissue optical properties with interstitial probes. In summary, monitoring thermal ablation is critical for consistent clinical success and many promising technologies are under development but an optimal solution has yet to achieve widespread adoption.

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Section: Magnetic Resonance Elastographymentioning

confidence: 99%

Methods of monitoring thermal ablation of soft tissue tumors – A comprehensive review

et al. 2022

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“…An additional approach to in vivo MRT in the presence of fat, albeit based on a different physical principle, is presented separately in subsection "Choosing a Special Method for a Special Situation: Temperature Measurement through Intermolecular Coherences in Bone Marrow and Particular Adipose Tissues". (Kim et al, 2020); see also Table S1. MRE provides information on the tissue ablation process that is complementary to information provided by thermal maps and had previously been applied in the context of hyperthermia, but only in conjunction with classical phase-based PRFS as a temperature mapping technique.…”

Section: Ll Open Accessmentioning

confidence: 99%

Contactless Thermometry by MRI and MRS: Advanced Methods for Thermotherapy and Biomaterials

Lutz¹,

Bernard²

2020

iScience

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Control of temperature variation is of primordial importance in particular areas of biomedicine. In this context, medical treatments such as hyperthermia and cryotherapy, but also the development and use of hydrogel-based biomaterials are of particular concern. To enable accurate temperature measurement without perturbing or even destroying the biological tissue or material to be monitored, contactless thermometry methods are preferred. Among these, the most suitable are based on magnetic resonance imaging and spectroscopy (MRI, MRS). Here, we address the latest developments in this field as well as their current and anticipated practical applications. We highlight recent progress aimed at rendering MR thermometry faster and more reproducible, versatile and sophisticated, and provide our perspective on how these new techniques broaden the range of applications in medical treatments and biomaterial development by enabling insight into finer details of thermal behavior. Thus, these methods facilitate optimization of clinical and industrial heating and cooling protocols.

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“…Similarly, this allows for improved image-guided thermal monitoring, most recently using simultaneous fat-referenced proton resonance frequency shift thermometry combined with magnetic resonance elastography. 50 Half-Fourier-acquired single-shot turbo spin-echo or full turbo spin-echo techniques are also used for sequential acquisition of high-resolution T2-weighted images, and they can produce two-dimensional slices in less than a second and so are used routinely during MR-guided injections and biopsies, embolization procedures, or sclerotherapy. [51][52][53] Gradient-echo sequences should be avoided because they amplify the needle artifact due to the buildup of field heterogeneities.…”

Section: Future Directionsmentioning

confidence: 99%

Interventional Techniques for Bone and Musculoskeletal Soft Tissue Tumors: Current Practices and Future Directions – Part II. Stabilization

Dalili

Isaac

Cazzato

et al. 2020

Semin Musculoskelet Radiol

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Percutaneous image-guided oncologic interventions have rapidly evolved over the last two decades as an independent strategy or used within a first-, second-, or even third-line strategy in the treatment of musculoskeletal (MSK) tumors. Abundant mostly nonrandomized publications have described the safety, efficacy, and reproducibility of implementing percutaneous therapies both with curative and palliative intent. In this article, we continue to share our experience in bone and MSK soft tissue interventions focusing on stabilization and combined ablation and stabilization. We propose a pathway and explore future directions of image-guided interventional oncology related to skeletal disease. We reflect on the advantages and limitations of each technique and offer guidance and pearls to improve outcomes. Representing patterns from our practices, we demonstrate the role of collaborative working within a multidisciplinary team, ideally within a dedicated tumor treatment center, to deliver patient-specific therapy plans that are value based and favored by patients when given the choice.

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Simultaneous fat‐referenced proton resonance frequency shift thermometry and MR elastography for the monitoring of thermal ablations

Cited by 9 publications

References 32 publications

Methods of monitoring thermal ablation of soft tissue tumors – A comprehensive review

Methods of monitoring thermal ablation of soft tissue tumors – A comprehensive review

Contactless Thermometry by MRI and MRS: Advanced Methods for Thermotherapy and Biomaterials

Interventional Techniques for Bone and Musculoskeletal Soft Tissue Tumors: Current Practices and Future Directions – Part II. Stabilization

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