Gotowe bibliografie tematyczne / THz frequency ablation

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Gotowa bibliografia na temat „THz frequency ablation”

Autor: Grafiati

Data publikacji: 2 czerwca 2025

Data aktualizacji: 31 lipca 2025

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Artykuły w czasopismach na temat "THz frequency ablation"

GEYİKOĞLU, Miraç Dilruba, Hilal KOÇ, Bülent ÇAVUŞOĞLU, Mehmet ERTUGRUL, and Karim ABBASİAN. "Designing Graphene-Based Antenna for Terahertz Wave Ablation (TWA) System." Erzincan Üniversitesi Fen Bilimleri Enstitüsü Dergisi 15, no. 2 (2022): 507–14. http://dx.doi.org/10.18185/erzifbed.1014513.

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Cancer is one of the most feared health problems today. Studies on cancer diagnosis and treatment are carried out intensively. In this study, a graphene-based antenna is proposed for cancer diagnosis and treatment with THz radiation therapy, which is a relatively new radiation technique. A graphene-based two-layer monopole antenna is designed for 1.65THz operation frequency. To change the bandwidth and radiation pattern without changing the operating frequency, a graphene ring is placed on the SiO2 substrate (2nd layer).Antenna performance is analyzed for reflection coefficient, realized gain,

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Huang, Hsin-hui, Takeshi Nagashima, Tetsu Yonezawa, et al. "Giant Enhancement of THz Wave Emission under Double-Pulse Excitation of Thin Water Flow." Applied Sciences 10, no. 6 (2020): 2031. http://dx.doi.org/10.3390/app10062031.

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Simultaneous measurements of THz wave and hard X-ray emission from thin and flat water flow when irradiated by double femtosecond laser pulses (800 nm, 35 fs/transform-limited, 0.5 kHz, delay times up to 15 ns) were carried out. THz wave measurements by time-domain spectroscopy and X-ray detection by Geiger counters were performed at the transmission and the reflection sides of the flow. THz wave emission spectra show their dynamic peak shifts toward the low frequency with the highest intensity enhancements more than 1.5 × 10 3 times in |E| 2 accumulated over the whole spectrum range of 0–3 TH

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Neelakanta, Perambur. "de Novo Radio Frequency Ablation Therapy: Application of Unexplored Electromagnetic Spectral Resources of mm-Wave/THz Band in Clinical Ablation Procedures – A Review." British Journal of Medicine and Medical Research 3, no. 4 (2013): 1701–30. http://dx.doi.org/10.9734/bjmmr/2013/4368.

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Aşırım, Özüm Emre, Alim Yolalmaz, and Mustafa Kuzuoğlu. "High-Fidelity Harmonic Generation in Optical Micro-Resonators Using BFGS Algorithm." Micromachines 11, no. 7 (2020): 686. http://dx.doi.org/10.3390/mi11070686.

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Harmonic generation is an attractive research field that finds a variety of application areas. However, harmonic generation within a medium of micron-scale interaction length limits the magnitude of nonlinear coupling and leads to poor harmonic generation efficiency. In this study, we present a constrained non-linear programming approach based on the Quasi-Newton Broyden–Fletcher–Goldfarb–Shanno (BFGS) algorithm to obtain high-fidelity harmonic generation in optical micro-resonators. Using this approach, one can achieve high-intensity harmonic generation in a simple Fabry–Perot type optical mi

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Colangelo, Nicola, Stefano Benussi, Simona Nascimbene, et al. "Cardiopulmonary bypass strategy during concomitant surgical treatment of mitral valve disease and atrial fibrillation." Perfusion 18, no. 1 (2003): 19–24. http://dx.doi.org/10.1191/0267659103pf641oa.

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In recent years, the popularity of simplified intraoperative ablation approaches to treat atrial fibrillation (AF) has been progressively increasing. Our group has described a left atrial procedure based on epicardial radio frequency ablation on cardiopulmonary bypass (CPB). We report our CPB and myocardial protection strategy in 157 patients who underwent AF ablation combined with open-heart surgery from February 1998 to February 2002. Since epicardial ablations are performed on CPB on the beating heart, the CPB strategy is crucial. Total normothermic CPB allows a safe dissection around the p

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Zhang, Huazhong, Hongbiao Yin, Xia Lei, et al. "An Improved CNN-Based Algorithm for Quantitative Prediction of Impact Damage Depth in Civil Aircraft Composites via Multi-Domain Terahertz Spectroscopy." Electronics 14, no. 12 (2025): 2412. https://doi.org/10.3390/electronics14122412.

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To address the issue of low accuracy and stability in traditional Convolutional Neural Networks (CNN)-based defect depth prediction for civil aircraft composites, we propose an improved Feature Enhancement Network (FEN)-CNN-Bidirectional Long Short-Term Memory (BiLSTM) impact damage depth prediction method. By integrating terahertz (THz) time-domain, frequency-domain, and absorbance spectroscopy with Confocal Laser Scanning Microscopy (CLSM) depth measurements, the correlation between THz spectral features and impact damage defect depth is systematically elucidated, thereby constructing a “THz

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Simon, Alex, Connor Edsall, and Eli Vlaisavljevich. "Effects of pulse repetition frequency on bubble cloud characteristics and ablation for single-cycle histotripsy." Journal of the Acoustical Society of America 152, no. 4 (2022): A247. http://dx.doi.org/10.1121/10.0016161.

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Histotripsy is a cavitation-based focused ultrasound ablation method in development for multiple clinical applications. This work investigates the effects of pulse repetition frequency (PRF) on histotripsy bubble cloud characteristics and ablative capabilities for single cycle histotripsy. Bubble clouds produced by a 500 kHz histotripsy system at PRF’s from 0.1 to 1000 Hz were visualized using high speed imaging in 1% agarose phantoms. Cloud images were analyzed to determine bubble cloud density (bubbles/mm2) and pulse-to-pulse bubble correlation. Ablation was assessed through lesion analysis

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Raut, R., MB KC, S. Rajbhandari, M. Dhungana, R. Shah, and KB Shah. "Radio Frequency Ablation of right sided accessory pathway - 8 years experience at SGNHC." Nepalese Heart Journal 8, no. 1 (2013): 19–22. http://dx.doi.org/10.3126/njh.v8i1.8332.

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Background Radiofrequency ablation has been established as the curative treatment for most of supraventricular tachycardia since 1987. In SGNHC, ablation has been done routinely since 2003. In our experience, right sided accessory pathway (AP) has been technically difficult and challenging with low success rate as mentioned in literature outside. So, the objective of this article was to analyze the demographic characteristics, success and recurrence rate and complication of right sided AP ablation in our centre. Methods and Materials From 13th Oct 2003 to 9th Sept. 2011, altogether 768 patient

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Xu, B., Y. Ma, X. Yang, et al. "Effect of high-Z dopant on the laser-driven ablative Richtmyer–Meshkov instability." Laser and Particle Beams 35, no. 2 (2017): 366–72. http://dx.doi.org/10.1017/s0263034617000301.

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AbstractThe effects of high-Z dopant on the laser-driven ablative Richtmyer–Meshkov instability (RMI) are investigated by theoretical analysis and radiation hydrodynamics simulations. It is found that the oscillation amplitude of ablative RMI depends on the ablation velocity, the blow-off plasma velocity and the post-shock sound speed. Owing to enhancing the radiation at the plasma corona and increasing the radiation temperature at the ablation front, the high-Z dopant in plastic target can significantly increase the ablation velocity and the blow-off plasma velocity, leading to an increase in

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Severgin, Vladisav, Sergei Prohoda, and Aleksey Prohoda. "THE USE OF RADIO-FREQUENCY ABLATION IN THE TREATMENT OF MALIGNANT TUMORS OF LUNGS AND PLEURA." EUREKA: Health Sciences 3 (May 31, 2016): 31–35. http://dx.doi.org/10.21303/2504-5679.2016.00097.

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Aim of the work. Analysis of the possibilities of the different methods of RFA of lung and pleura tumors. Material and methods. There were considered the different methods of radio-frequency ablations using FOTEK-150 apparatus in 186 patients with the malignant tumors of lungs and pleura. Results. In the result of use of the different methods of radio-frequency ablation the direct positive effect was attained in 91 % of observations. The complications were observed in 9 % of patients. This method must be used for patients with the malignant tumors of lungs and pleura when the radical surgical

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Rozprawy doktorskie na temat "THz frequency ablation"

Labonté, Sylvain. "A theoretical study of radio frequency ablation of the myocardium." Thesis, University of Ottawa (Canada), 1992. http://hdl.handle.net/10393/7559.

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Theoretical modeling of the lesion formation process during radio-frequency ablation of the myocardium is presented. The model is axisymmetric and consists of a catheter electrode coming in contact at right angle with the heart tissue. The electric power dissipated in the tissue is calculated and from it the temperature distribution and the resulting lesion are evaluated as a function of time. The cooling effect of the blood flow and the temperature dependence of the electrical conductivity are included in the model, making it non-linear. The finite-element method is used to discretize the spa

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Mackey, Sean Charles. "A dynamic model of radio frequency catheter ablation for the treatment of cardiac arrhythmias." Diss., The University of Arizona, 1994. http://hdl.handle.net/10150/187023.

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Accurate knowledge of the spatial and temporal temperature distribution within the myocardium would be of value in predicting lesion size and shape during radio frequency (RF) catheter ablation. Finite difference solutions of the Laplace equation, which models power delivery by the RF catheter, and the Bioheat equation, which predicts temperature rise within the myocardium, were developed to accurately model lesion generation during RF ablation. This model included the effects of tissue and electrode heat conduction, tissue perfusion, and the convective losses within the heart chamber. Results

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Latouche, Eduardo L. "High-Frequency Irreversible Electroporation (H-FIRE) optimization for the treatment of highly invasive cells beyond the tumor margin." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/81131.

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Irreversible electroporation (IRE) is a non-thermal ablation technique that allows for eradication of unresectable tumors in a minimally invasive procedure. While IRE will preferentially kill larger cells over smaller ones, it does not discriminate between cells with larger and small nuclei. Given that one of the hallmarks of cancer cell morphology is larger, more abundant nuclei, our team set out to explore the possibility of preferentially targeting this physical and geometrical characteristic.<br>Master of Science

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Johansson, Johannes. "Impact of Tissue Characteristics on Radio-Frequency Lesioning and Navigation in the Brain : Simulation, experimental and clinical studies." Doctoral thesis, Linköpings universitet, Tekniska högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-15749.

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Radio-Frequency (RF) lesioning, or RF ablation, is a method that uses high frequency currents for thermal coagulation of pathological tissue or signal pathways. The current is delivered from an electrode, which also contains a temperature sensor permitting control of the current at a desired target temperature. In the brain, RF lesioning can e.g. be used for treatment of severe chronic pain and movement disorders such as Parkinson’s disease. This thesis focuses on modelling and simulation with the aim of gaining better understanding and predictability of the lesioning process in the central br

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Magnan, Romain. "Oxyde transparent conducteur de ZnO : V à partir d'une cible de nanoparticules : de l’ablation par laser pulsé à un procédé de décharge à barrière diélectrique double fréquence à pression atmosphérique Transparent and conductive vanadium doped zinc oxide thin films by pulsed laser deposition from different targets Atmospheric pressure dual RF-LF frequency discharge: Influence of LF voltage amplitude on the RF discharge behavior Atmospheric pressure dual RF-LF frequency discharge: transition from α to α-γ-mode". Thesis, Perpignan, 2020. http://www.theses.fr/2020PERP0008.

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Cette thèse en cotutelle entre la France et le Canada a pour objectif de développer une méthode innovante d’élaboration de couches minces nano-composites de ZnO:V, basée sur la mise en vol et le dépôt de nanoparticules (NPs) de ZnO :V par des Décharges à Barrière Diélectrique (DBDs) double fréquence. Cette méthode de dépôt vise à réduire le coût de production par l’utilisation de nanoparticules synthétisées par méthode sol-gel et de DBDs dans une configuration permettant le dépôt de couches minces en continu à pression atmosphérique. Les travaux se sont déroulés en trois phases :- L’étude des

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Tiong, Leong Ung. "Improving the safety and efficacy of bimodal electric tissue ablation." Thesis, 2012. http://hdl.handle.net/2440/74060.

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Introduction: Bimodal electric tissue ablation (BETA) is a new method of ablation, which combines the process of electrolysis with radiofrequency ablation (RFA) to increase the size of tissue ablations. The cathode of the electrolytic circuit is connected to the radiofrequency (RF) electrode to increase the surrounding tissue hydration. This allows the RFA process to continue for a longer period of time and therefore produce larger ablations. Previous research has shown that BETA could produce larger ablations compared to standard RFA and that it did not produce any significant short or long-

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Książki na temat "THz frequency ablation"

van Eerd, Maarten, Arno Lataster, and Maarten van Kleef. Cervical Facet Nerve Block and Radio Frequency Ablation: Fluoroscopy. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780199908004.003.0007.

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In the cervical spinal column local anesthetic can be injected intra-articularly or adjacent to the ramus medialis (medial branch) of the ramus dorsalis of the segmental nerve. Nerve blocks of the ramus medialis are preferred to an intra-articular block, because it is sometimes technically difficult to position a needle into the facet joint. These procedures are typically performed under fluoroscopy, but there are increasing numbers of studies that describe these procedures with the help of ultrasound. Reports regarding the effects of intra-articular (steroid) injections are limited. There are

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Kahn, S. Lowell. Bland Lipiodol-Assisted Thermal Ablation of Renal Cell Carcinoma. Edited by S. Lowell Kahn, Bulent Arslan, and Abdulrahman Masrani. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780199986071.003.0073.

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Surgical resection of renal cell carcinoma (RCC) remains the standard of care given the excellent reported outcomes for early stage disease, with 5-year cancer-specific survival (CSS) rates of 97% for pT1a and 87% for pT1b tumors after nephrectomy. Outcomes after partial nephrectomy are equally encouraging, with 5- and 10-year CSS rates of 92% and 80%, respectively, across all stages and 96% and 90%, respectively, for tumors less than 4 cm. Transarterial embolization prior to thermal ablation for RCC is far less frequent, but it is described in the literature. To date, there are no randomized

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Brown, Jim, and Neal Navani. Non-surgical management of early-stage lung cancer. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780199657742.003.0004.

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As low-dose computed tomography screening of ‘high-risk’ smokers is occurring with increasing frequency, the incidental discovery of solitary pulmonary nodules is becoming more frequent, and lung cancer multidisciplinary teams are now often faced with balancing risk and benefit when making decisions regarding the radical treatment of patients with a clinical diagnosis of early lung cancer but borderline fitness. Surgery offers the best prospect of cure but is associated with significant mortality and morbidity; the elderly and frail experience more toxicity and a greater impact on the quality

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Kastler, Adrian, and Bruno Kastler. Cervical Sympathetic Block and Neurolysis: Computed Tomography. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780199908004.003.0029.

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The stellate ganglion blockade technique is used to treat complex regional pain syndrome (CRPS). It is now well established that stellate blockades should be performed under imaging guidance. It has been suggested that alcohol may bring longer lasting relief in cases of severe intractable cancer-related pain arising from regional neoplasms invading the stellate ganglion, but frequent onset of Horner’s syndrome can outweigh the technique’s efficacy. Radiofrequency neurolysis (RFN) has become a common procedure in the management of chronic neuropathic pain. This chapter reviews indications of st

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Kapural, Leonardo. Lumbar Disc Procedures: Fluoroscopy. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780199908004.003.0023.

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Discogenic lumbar pain is a frequent cause of prolonged disability. Currently, there are few effective minimally invasive therapeutic options to treat diseased discs and provide a long-term pain relief. Intradiscal biacuplasty improves functional capacity and affords pain relief in properly selected patients. Provocative discography is a relatively invasive intradiscal technique that has been used as a diagnostic tool to help to detect painful discs and associated morphological changes. One of the effective therapeutic approaches to control discogenic pain is to use an ablative radiofrequency

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10.36255/varicose-veins-patient-public-education. Exon Publications, 2025. https://doi.org/10.36255/varicose-veins-patient-public-education.

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Varicose veins are a common yet often misunderstood condition that affects millions worldwide, causing visible swelling and twisting of veins, especially in the legs. This article provides a complete guide to varicose veins, explaining what they are, how they develop, and why certain people are at higher risk. The content begins with an easy-to-follow introduction before moving into important sections that cover causes, symptoms, diagnosis, and possible dangers if left untreated. Detailed explanations on the types of varicose veins, including differences between spider veins and varicose veins

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Elliott, Perry, and Alexandros Protonotarios. Arrhythmogenic right ventricular cardiomyopathy: management of symptoms and prevention of sudden cardiac death. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780198784906.003.0361.

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Patients with arrhythmogenic right ventricular cardiomyopathy (ARVC) have arrhythmia-related symptoms or are identified during screening of an affected family. Heart failure symptoms occur late in the disease’s natural history. As strenuous exercise has been associated with disease acceleration and worsening of ventricular arrhythmias, lifestyle modification with restricted athletic activities is recommended upon disease diagnosis or even identification of mutation carrier status. An episode of an haemodynamically unstable, sustained ventricular tachycardia or ventricular fibrillation as well

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Części książek na temat "THz frequency ablation"

Hines-Peralta, Andrew, S. Nahum Goldberg, Emilio Quaia, and Fulvio Stacul. "Radio-frequency Ablation and Cryoablation for Renal Cell Carcinoma." In Radiological Imaging of the Kidney. Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-54047-9_23.

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De Paolis, Lucio T., Francesco Ricciardi, Aldo F. Dragoni, and Giovanni Aloisio. "An Augmented Reality Application for the Radio Frequency Ablation of the Liver Tumors." In Computational Science and Its Applications - ICCSA 2011. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-21898-9_47.

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Wu, Chunjiu, Jianwei Jin, Lei Guo, et al. "The Research on Ablation Characteristics of Oil and Gas Pipeline Under Power Frequency Current." In The proceedings of the 10th Frontier Academic Forum of Electrical Engineering (FAFEE2022). Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-3408-9_111.

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Georgiev, K., N. Kosturski, and Y. Vutov. "On the Adaptive Time-Stepping in Radio-Frequency Liver Ablation Simulation: Some Preliminary Results." In Large-Scale Scientific Computing. Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-662-43880-0_45.

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Aganovic, Lejla, and Dominik Nörenberg. "Benign and Malignant Renal Disease." In IDKD Springer Series. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-27355-1_11.

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AbstractImaging of renal disease encompasses a wide spectrum of benign, malignant, and non-neoplastic lesions. Focal renal masses (of benign and malignant origin) are the most frequent entities and the number of incidentally detected renal lesions is constantly increasing. Several imaging modalities are available to optimize characterization, staging, and treatment of cystic and solid renal masses. Cystic and solid renal masses can be imaged with ultrasound (US), computed tomography (CT), and magnetic resonance imaging (MRI), with contrast enhancement needed to optimize renal mass detection an

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Moskal, Anna. "Ablations, Cryotherapy, and Maze Procedure." In Advanced Anesthesia Review, edited by Alaa Abd-Elsayed. Oxford University PressNew York, 2023. http://dx.doi.org/10.1093/med/9780197584521.003.0123.

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Abstract Cardiac arrhythmias are common and an important source of mortality and morbidity. Current management options include surgical and catheter ablative techniques using surgical incisions, cryotherapy, or radio-frequency (RF) energy. General indications include drug-resistant arrhythmias, drug intolerance, severe symptoms, or a desire to avoid lifelong symptoms. Ablative procedures can abolish the origins of arrhythmias by interposition of scar tissue along a reentry pathway or by isolating an ectopic area. Paroxysmal atrial fibrillation (PAF) often results from ectopic beats originating

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Zotov, Alexandr, Oleg Shelest, Emil Sakharov, Robert Khabazov, and Alexandr Troitsky. "Surgical Treatment of Patients with Aortic Valve Disease in Association with Atrial Fibrillation." In Aortic Valve Disease - Recent Advances [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.112888.

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The frequency of atrial fibrillation development in patients with severe aortic valve stenosis ranges from 4 to 30%. This arrhythmia significantly worsens patients’ long-term survival. Currently, it is considered that performing ablation of arrhythmogenic myocardial areas during valve surgery does not impact in-hospital mortality and does not lead to prolonged hospital stay. According to modern recommendations, this procedure should be performed in all patients diagnosed with atrial fibrillation if the pericardium is opened. There are numerous ablation protocols available. For patients with is

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Lee, Christine. "The Relationship between Intentional Dental Ablation and Hereditary Agenesis in Late Neolithic to Early Bronze Age China." In A World View of Bioculturally Modified Teeth. University Press of Florida, 2017. http://dx.doi.org/10.5744/florida/9780813054834.003.0007.

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Dental ablation is a rare occurrence in ancient China. While previous studies have looked at cultural reasons for this practice this study examines possible biological causes for intentional tooth removal. Could a hereditary dental anomaly have been the original source for a cultural marker? The dentitions from 243 individuals were examined, representing five late Neolithic archaeological cultures. Each individual was scored for evidence of dental ablation, dental agenesis, and supernumerary teeth. Patterns of dental agenesis did not match regions with dental ablation. The one distinguishing t

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Pardoe, Colin, and Arthur C. Durband. "Tooth Ablation along the Murray River in Southeastern Australia." In A World View of Bioculturally Modified Teeth. University Press of Florida, 2017. http://dx.doi.org/10.5744/florida/9780813054834.003.0014.

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Tooth ablation has a long history among Australian Aborigines. Here we present a study of four groups along a 370km stretch of the Murray River in southeastern Australia. The frequency and patterning are examined with respect to the individual’s sex, population, and tooth type. Within the study area, ablation is nine times more common among men than women (27 percent versus 5 percent). Although the samples are from cemeteries, there is no chronological control and from other evidence the remains probably date to the later Holocene. Larger regional linguistic and cultural groupings appear to be

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Linte Cristian A., Camp Jon J., Holmes III David R., Rettmann Maryam E., Packer Douglas L., and Robb Richard A. "Toward Modeling of Radio-frequency Ablation Lesions for Image-guided Left Atrial Fibrillation Therapy: Model Formulation and Preliminary Evaluation." In Studies in Health Technology and Informatics. IOS Press, 2013. https://doi.org/10.3233/978-1-61499-209-7-261.

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In the context of image-guided left atrial fibrillation therapy, relatively very little work has been done to consider the changes that occur in the tissue during ablation in order to monitor therapy delivery. Here we describe a technique to predict the lesion progression and monitor the radio-frequency energy delivery via a thermal ablation model that uses heat transfer principles to estimate the tissue temperature distribution and resulting lesion. A preliminary evaluation of the model was conducted in ex vivo skeletal beef muscle tissue while emulating a clinically relevant tissue ablation

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Streszczenia konferencji na temat "THz frequency ablation"

Wang, You Wei, Zihao Yang, Kosaku Kato, et al. "Low and High Spatial Frequency Periodic Surface Structure Formation under Terahertz Free Electron Laser Irradiation." In JSAP-Optica Joint Symposia. Optica Publishing Group, 2024. https://doi.org/10.1364/jsapo.2024.18p_b2_8.

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Terahertz (THz) technology has recently seen significant advancements and applications in several fields, including ultrafast electric field measurement[1], semiconductor diagnostics[2], and magnetic material control[3]. Ablation phenomena in the terahertz range have been relatively underexplored due to the limited availability of powerful THz sources. However, recent progress in laser technology has opened up opportunities for the development of high-intensity THz sources, thereby facilitating investigations into ablation processes [4] and nonlinear effects [5]. These advancements have also m

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Lin, Sen, Haidong Chen, Quan Xue, and Wenquan Che. "Design of A Dual-Frequency Planar Microwave Ablation Antenna." In 2020 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP). IEEE, 2020. http://dx.doi.org/10.1109/imws-amp49156.2020.9199739.

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Bakshi, Saurabh, Sijia Guo, and Xiaoning Jiang. "Multi-Frequency Focused Ultrasound for Tissue Ablation." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-64076.

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In this study, the effectiveness of tissue ablation was investigated using multi-frequency high intensity focused ultrasound (HIFU) transducers (950 kHz, 1.5 MHz). Temperature rise and lesion volume were recorded when chicken tissue was ablated by focused ultrasound (FUS) with controlled ultrasound power and exposure time using single frequency and multi-frequency modes. It was found that multi-frequency tissue ablation gives a higher maximum temperature accompanied by a faster rise, and a larger ablation lesion volume, compared with single frequency ablation, under the same input conditions o

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Hager, Gordon D. "Progress report on the development of a repetitively pulsed frequency-shifted COIL laser." In High-Power Laser Ablation III. SPIE, 2000. http://dx.doi.org/10.1117/12.407385.

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Anderson, J. E., G. C. Eiden, and N. S. Nogar. "Resonant Laser Ablation: Threshold Behavior and Semiquantitative Aspects." In Laser Applications to Chemical Analysis. Optica Publishing Group, 1994. http://dx.doi.org/10.1364/laca.1994.thb.3.

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Ever since the first report of laser action, it has been recognized that laser ablation (evaporation/volatilization) may provide a useful sampling mechanism for chemical analysis. In particular, laser ablation is rapidly gaining popularity as a method of sample introduction for mass spectrometry. Since its original description, numerous research papers and review articles have appeared on various aspects of laser mass spectrometry.1,2 While most laser ablation/mass spectrometry has been performed with fixed frequency lasers operating at relatively high intensities/fluences (≥108 W/cm2, ≥1 J/cm

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Qin, Yanbin, Nanxi Li, and Baolin Liu. "Theoretical Evaluation of Heat Transfer in Liver Tumor Microwave Ablation Using a 10-Slot Antenna at High Frequencies." In ASME 2021 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/imece2021-73846.

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Abstract Microwave ablation (MWA) cures cancer by inserting slender antennas into tumors and producing large amounts of heat to kill cancerous cells. A key challenge is the selective heating of cancer cells without damaging the surrounding tissue, which requires a control of heating power for appropriate temperature distribution. This study established a theoretical simulation model for the microwave ablation of a porcine liver by using a coaxial-slot antenna with 10 slots at high frequencies. The axisymmetric finite element method (FEM) with temperature dependent thermal and dielectric proper

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Mountris, Konstantinos, Richard Schilling, Alicia Casals, and Helge Wurdemann. "Meshless Modelling for Heat-based Robotic Navigation of Radio Frequency Catheter Ablation." In THE HAMLYN SYMPOSIUM ON MEDICAL ROBOTICS. The Hamlyn Centre, Imperial College London London, UK, 2023. http://dx.doi.org/10.31256/hsmr2023.27.

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Radio frequency catheter ablation (RFCA) of cardiac arrhythmia is commonly performed by navigating the catheter manually. Nevertheless, remote navigation tech- niques where catheter steering is performed using either a magnetic field or robotically are available. Clinical ex- perience with these techniques demonstrated that higher contact forces can be achieved with robotic compared to magnetic field navigation [1]. This translates into more effective ablation lesions, but if excessive contact force is applied it may lead to higher risk of cardiac perforation [2]. However, the robotic navigati

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Kabalin, John N. "Transurethral radio frequency ablation of the prostate." In Photonics West '96, edited by R. Rox Anderson. SPIE, 1996. http://dx.doi.org/10.1117/12.239991.

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Mattison, Lars M., and Paul A. Iaizzo. "Physiological Assessment of Cardiac Muscle Post-Irreversible Electroporation Therapy." In 2017 Design of Medical Devices Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/dmd2017-3542.

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Ablations have become the gold clinical standard of drug resistant atrial fibrillation (AF). AF is projected to affect 50 million people by the year 20501. Today, two primary methods of ablation are used clinically: radio frequency and cryoablation. These ablation technologies are equally effective1 but still cause complications. A majority of these complications arise from the fact that both technologies require a thermal change in the tissue to cause cell death. Thermal change of the tissue while effective, can be subject to many different variables that may result in collateral damage. Thes

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Webster, Mason J., Derek M. Herbert, Peter T. Pascoal, and Justin C. Smith. "Analysis of Electrode Degradation Through the Use of Synthetic Tissue Analog." In ASME 2009 4th Frontiers in Biomedical Devices Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/biomed2009-83004.

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RF Ablation Efficacy Testing: Modern surgical techniques utilize radio frequency ablation tools in minimally invasive procedures around the world today. The safety and efficacy of these tools must be verified before being used in human trials. This verification is typically performed on bovine, ovine, or porcine tissues which simulate clinical use.

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Raporty organizacyjne na temat "THz frequency ablation"

Shalganov, Tchavdar, Milko Stoyanov, and Vassil Traykov. Outcomes following catheter ablation for ventricular tachycardia in adult patients with structural heart disease and implantable cardioverter-defibrillator: protocol for an updated systematic review and meta-analysis of randomized studies. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, 2022. http://dx.doi.org/10.37766/inplasy2022.6.0080.

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Review question / Objective: Does catheter ablation for scar-related monomorphic ventricular tachycardia improve outcomes (defined as any appropriate ICD therapy, appropriate ICD shocks, all-cause mortality, VT storm, cardiovascular mortality, cardiovascular hospitalizations, complications) in adult patients with ischemic or non-ischemic cardiomyopathy and implantable cardioverter-defibrillator? Condition being studied: Ventricular tachycardia in patients with structural heart disease is usually an arrhythmia using the myocardial scar as a substrate for reentry. It poses a risk of syncope and

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