A comparison between 915 MHz and 2450 MHz microwave ablation systems for the treatment of small diameter lung metastases

Vogl, Thomas J.; Roman, Andrei; Nour-Eldin, Nour-Eldin A.; Hohenforst-Schmidt, Wolfgang; Bednarova, Iliana; Kaltenbach, Benjamin

doi:10.5152/dir.2018.17017

Cited by 22 publications

(14 citation statements)

References 29 publications

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“…These results may be explained by the ability of 2450 MHz MWA systems to deliver greater amounts of power and achieve larger ablation volumes 11. A recent observational study comparing 915 and 2450 MHz MWA for ablation of lung metastases found that ablation margin size was significantly associated with the local progression rate and that 2450 MHz MWA demonstrated a significantly better local progression-free survival curve than 915 MHz MWA (P=0.048) 59. Liu and colleagues did not report any differences in treatment effect when comparing these two MWA frequencies 60.…”

Section: Discussionmentioning

confidence: 99%

<p>Microwave ablation compared with radiofrequency ablation for treatment of hepatocellular carcinoma and liver metastases: a systematic review and meta-analysis</p>

Glassberg¹,

Ghosh²,

Clymer³

et al. 2019

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Purpose Percutaneous ablation techniques, including microwave ablation (MWA) and radiofrequency ablation (RFA), have become important minimally invasive treatment options for liver cancer. This systematic review compared MWA with RFA for treatment of liver cancer. Methods The systematic review and meta-analysis followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. A systematic search of MEDLINE, EMBASE, and Cochrane Central Register of Controlled Trials was conducted for randomized and observational studies published from 2006 onwards. A random-effects model was used for meta-analyses and local tumor progression (LTP), technique efficacy, overall survival (OS), disease-free survival (DFS), intrahepatic de novo lesions (IDL), extrahepatic metastases (EHM), length of stay (LOS), and complications were analyzed. Subgroup and sensitivity analyses were also conducted. Results Of 1379 studies identified, 28 randomized and observational studies met inclusion criteria. The main analysis demonstrated that LTP was significantly reduced by 30% with MWA versus RFA (RR=0.70; P=0.02) (all studies) and by 45% with MWA versus RFA (RR=0.55; P=0.007) (randomized studies only). There were no significant differences between MWA and RFA for other efficacy and safety outcomes. Higher frequency (2450 MHz) and larger tumor size (≥2.5 cm) are amongst variables that may be associated with improved outcomes for MWA. Sensitivity analyses were generally congruent with the main results. Conclusion MWA is at least as safe and effective as RFA for treating liver cancer and demonstrated significantly reduced LTP rates. Future studies should assess time and costs associated with these two treatment modalities.

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Section: Discussionmentioning

confidence: 99%

<p>Microwave ablation compared with radiofrequency ablation for treatment of hepatocellular carcinoma and liver metastases: a systematic review and meta-analysis</p>

Glassberg¹,

Ghosh²,

Clymer³

et al. 2019

OTT

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“…Thermal ablation therapy has been widely used in many benign and malignant solid tumors such as uterine broids, liver cancer, pancreatic cancer, osteoid osteoma 22,23 . The technique is effective and safe, but there are still many scienti c and technical problems to be solved in the application of microwave thermal ablation in bone tumor surgery.…”

Section: Discussionmentioning

confidence: 99%

Microwave Ablation Efficacy Evaluation of Bone Tissue Based on Near Infrared Spectrum

Liu

Zhou

Meng

et al. 2020

Preprint

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Background:Microwave hyperthermic tumor ablation has played an important role in the treatment of bone tumors because of its obvious curative effect, less side effects and fewer complications. The real-time evaluation of the curative effect in microwave ablation of bone tumors is a research tissue. In this paper, it proposes to study the ablation effect of bone tissue by near-infrared spectroscopy and optical parameters. First, bone tissue heating experiment was used to verify the difference in bone tissue near-infrared spectrum before and after heating. Results: In bone tissue microwave ablation experiment, it studied the changes of tissue near-infrared spectrum and optical parameters (reduced scattering coefficient, slope factor, area factor) during specific microwave ablation conditions. It was found that some factors (area(500-550), slope(524-532) and slope(565-570)) changed significantly, correlated with microwave ablation time, which could be used as evaluation factors of microwave ablation. Conclusions: The results lay a foundation for the development of a new method for real-time evaluation of ablation efficacy.

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“…Although this allows ablation of larger targets, the shape of the coagulation zone becomes less predictable, which increases the risk of adverse effects as intravascular steam burns outside the target. MWA devices operating at 2450 MHz and above are applied to create an ablation zone that is smaller and more spherical than the zone with devices operating at 915 MHz [220,253,254]. Available devices at 2450 MHz include the cooled 14 gauge mini-choked HS AMICA (HS Hospital Service, Rome, Italy) [215,255], the Acculis (AngioDynamics, NY, USA) [216], the Solero (AngioDynamics, NY, USA), the Emprint Ablation System (Medtronic Inc, Minneapolis, MN, USA, formerly Covidien) [217,221] and the NeuWave Certus Microwave Ablation System (NeuWave Medical, Madison, Wisconsin) [256].…”

Section: Local Heating Techniquesmentioning

confidence: 99%

Heating technology for malignant tumors: a review

Kok

Cressman

Ceelen

et al. 2020

International Journal of Hyperthermia

229

188

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The therapeutic application of heat is very effective in cancer treatment. Both hyperthermia, i.e., heating to 39-45 C to induce sensitization to radiotherapy and chemotherapy, and thermal ablation, where temperatures beyond 50 C destroy tumor cells directly are frequently applied in the clinic. Achievement of an effective treatment requires high quality heating equipment, precise thermal dosimetry, and adequate quality assurance. Several types of devices, antennas and heating or power delivery systems have been proposed and developed in recent decades. These vary considerably in technique, heating depth, ability to focus, and in the size of the heating focus. Clinically used heating techniques involve electromagnetic and ultrasonic heating, hyperthermic perfusion and conductive heating. Depending on clinical objectives and available technology, thermal therapies can be subdivided into three broad categories: local, locoregional, or whole body heating. Clinically used local heating techniques include interstitial hyperthermia and ablation, high intensity focused ultrasound (HIFU), scanned focused ultrasound (SFUS), electroporation, nanoparticle heating, intraluminal heating and superficial heating. Locoregional heating techniques include phased array systems, capacitive systems and isolated perfusion. Whole body techniques focus on prevention of heat loss supplemented with energy deposition in the body, e.g., by infrared radiation. This review presents an overview of clinical hyperthermia and ablation devices used for local, locoregional, and whole body therapy. Proven and experimental clinical applications of thermal ablation and hyperthermia are listed. Methods for temperature measurement and the role of treatment planning to control treatments are discussed briefly, as well as future perspectives for heating technology for the treatment of tumors.

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A comparison between 915 MHz and 2450 MHz microwave ablation systems for the treatment of small diameter lung metastases

Cited by 22 publications

References 29 publications

<p>Microwave ablation compared with radiofrequency ablation for treatment of hepatocellular carcinoma and liver metastases: a systematic review and meta-analysis</p>

<p>Microwave ablation compared with radiofrequency ablation for treatment of hepatocellular carcinoma and liver metastases: a systematic review and meta-analysis</p>

Microwave Ablation Efficacy Evaluation of Bone Tissue Based on Near Infrared Spectrum

Heating technology for malignant tumors: a review

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