Relevant bibliographies by topics / Ablation Study

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Academic literature on the topic 'Ablation Study'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Ablation Study"

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Munier, Sean M., Eric L. Hargreaves, Nitesh V. Patel, and Shabbar F. Danish. "Ablation dynamics of subsequent thermal doses delivered to previously heat-damaged tissue during magnetic resonance–guided laser-induced thermal therapy." Journal of Neurosurgery 131, no. 6 (December 2019): 1958–65. http://dx.doi.org/10.3171/2018.7.jns18886.

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OBJECTIVEIntraoperative dynamics of magnetic resonance–guided laser-induced thermal therapy (MRgLITT) have been previously characterized for ablations of naive tissue. However, most treatment sessions require the delivery of multiple doses, and little is known about the ablation dynamics when additional doses are applied to heat-damaged tissue. This study investigated the differences in ablation dynamics between naive versus damaged tissue.METHODSThe authors examined 168 ablations from 60 patients across various surgical indications. All ablations were performed using the Visualase MRI-guided laser ablation system (Medtronic), which employs a 980-nm diffusing tip diode laser. Cases with multiple topographically overlapping doses with constant power were selected for this study. Single-dose intraoperative thermal damage was used to calculate ablation rate based on the thermal damage estimate (TDE) of the maximum area of ablation achieved (TDEmax) and the total duration of ablation (tmax). We compared ablation rates of naive undamaged tissue and damaged tissue exposed to subsequent thermal doses following an initial ablation.RESULTSTDEmax was significantly decreased in subsequent ablations compared to the preceding ablation (initial ablation 227.8 ± 17.7 mm2, second ablation 164.1 ± 21.5 mm2, third ablation 124.3 ± 11.2 mm2; p = < 0.001). The ablation rate of subsequent thermal doses delivered to previously damaged tissue was significantly decreased compared to the ablation rate of naive tissue (initial ablation 2.703 mm2/sec; second ablation 1.559 mm2/sec; third ablation 1.237 mm2/sec; fourth ablation 1.076 mm/sec; p = < 0.001). A negative correlation was found between TDEmax and percentage of overlap in a subsequent ablation with previously damaged tissue (r = −0.164; p < 0.02).CONCLUSIONSAblation of previously ablated tissue results in a reduced ablation rate and reduced TDEmax. Additionally, each successive thermal dose in a series of sequential ablations results in a decreased ablation rate relative to that of the preceding ablation. In the absence of a change in power, operators should anticipate a possible reduction in TDE when ablating partially damaged tissue for a similar amount of time compared to the preceding ablation.
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Kim, Sang Hyun, Jae Min Lee, Kang Won Lee, Sang Hoon Kim, Se Hyun Jang, Han Jo Jeon, Seong Ji Choi, et al. "Irreversible electroporation of the bile duct in swine: A pilot study." Journal of Clinical Oncology 38, no. 4_suppl (February 1, 2020): 541. http://dx.doi.org/10.1200/jco.2020.38.4_suppl.541.

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541 Background: Irreversible electroporation (IRE) is a relatively new ablative method. However, the application of IRE ablation has not been attempted for the treatment of biliary disease. Minimally invasive approach using endoscopic retrograde cholangio-pancreatography (ERCP) can be a novel therapeutic modality for IRE ablation. In this study, we investigated the feasibility and effect of endoscopic IRE for biliary tract in animal model. Methods: A new catheter electrode was developed for endoscopic IRE ablation of biliary tract. The electrode for IRE ablation has two band-shaped electrodes on catheter tip. We performed ERCP and endoscopic IRE ablations on normal common bile duct in 6 Yorkshire pigs. Experimental parameters of IRE were 500V/cm, 1000V/cm and 2000V/cm (under 50 pulses, 100 µs length). Animals were sacrificed after 24 hours and ablated bile duct were collected. H & E stain, immunohistochemistry and western blot were performed. Results: Well-demarcated focal color changes were observed on the mucosa of the common bile duct under all experimental parameters. After IRE ablation, bile duct epithelium was disappeared around ablated area and it showed fibrotic change in H&E stain. Depth of change after IRE was different between each experimental parameters. Apoptotic change of bile duct was localized around mucosa in 500V. Diffuse transmural fibrosis of bile duct was shown after IRE ablation with 2000V. TUNEL immunohistochemistry showed the cell death of bile duct mucosa and submucosa along the electrode. Within 24 hours, no complication was observed in pigs after endoscopic IRE ablation. Conclusions: Endoscopic IRE ablation using ERCP was successfully performed on common bile duct by using catheter-shaped electrode. It can be a potential therapeutic option as minimally invasive ablation for treatment of biliary tumors.
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SANZ, J., R. BETTI, and V. N. GONCHAROV. "Rayleigh–Taylor instability analysis of targets with a low-density ablation layer." Laser and Particle Beams 17, no. 2 (April 1999): 237–44. http://dx.doi.org/10.1017/s0263034699172094.

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Irregularities on the outer surface of Inertial Confinement Fusion (ICF) capsules accelerated by laser irradiation are amplified by the Rayleigh–Taylor instability (RTI), which occurs at the ablation front (ablative RTI), where density gradient and acceleration have the same direction. The analytic stability theory of subsonic ablation fronts, for Froude number larger than one, shows that the main stabilization mechanisms are blowoff convection (rocket effect equilibrating the gravity force) and ablation (Sanz 1994; Betti et al. 1996). Blowoff convection and ablation are enhanced if the ablator material is mixed with high-Z dopants. The latest enhances radiation emission setting the ablator on a higher adiabat, lowering its density, and increasing the ablation velocity. When such an ablator is used to push a solid deuterium-tritium (D–T) shell, the D–T-ablator interface becomes classically unstable. The aim of this paper is to investigate the stability of such a configuration, represented by a low-density ablator pushing a heavier shell, and study the interplay between the classical and ablative RTIs occurring simultaneously. The stability analysis is carried out using a sharp boundary model (Piriz et al. 1997), which contains all the basic physics of the RTI in ICF.
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Munier, Sean M., Allison S. Liang, Akshay N. Desai, Jose K. James, and Shabbar F. Danish. "Characterization of Magnetic Resonance Thermal Imaging Signal Artifact During Magnetic Resonance Guided Laser-Induced Thermal Therapy." Operative Neurosurgery 19, no. 5 (July 31, 2020): 619–24. http://dx.doi.org/10.1093/ons/opaa229.

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Abstract BACKGROUND Magnetic resonance-guided laser interstitial thermal therapy (MRgLITT) is a minimally invasive procedure that utilizes intraoperative magnetic resonance thermal imaging (MRTI) to generate a thermal damage estimate (TDE) of the ablative area. In select cases, the MRTI contains a signal artifact or defect that distorts the ablative region. No study has attempted to characterize this artifact. OBJECTIVE To characterize MRTI signal the artifact in select cases to better understand its potential relevance and impact on the ablation procedure. METHODS All ablations were performed using the Visualase magnetic resonance imaging-guided laser ablation system (Medtronic). Patients were included if the MRTI contained signal artifact that distorted the ablative region during the first thermal dose delivered. Ablation artifact was quantified using MATLAB version R2018a (Mathworks Inc, Natick, Massachusetts). RESULTS A total of 116 patients undergoing MRgLITT for various surgical indications were examined. MRTI artifact was observed in 37.0% of cases overall. Incidence of artifact was greater at higher powers (P &lt; .001) and with longer ablation times (P = .024), though artifact size did not correlate with laser power or ablation duration. CONCLUSION MRTI signal artifact is common during LITT. Higher powers and longer ablation times result in greater incidence of ablation artifact, though artifact size is not correlated with power or duration. Future studies should aim to evaluate effects of artifact on postoperative imaging and, most notably, patient outcomes.
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Zhao, Fei, Lanhai Su, Rong Zhu, and Zhihui Li. "Study of linear ablative rate of D6AC steel wing used on supersonic missile." Thermal Science 23, no. 6 Part B (2019): 4107–16. http://dx.doi.org/10.2298/tsci180910323z.

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The D6AC steel wing used on supersonic missile is the object in this study. Its service environment was generated and simulated. The ablation experiment of D6AC steel missile wing was carried out under different parameters of flow field. The ablation process of D6AC steel wing was studied and analyzed under the supersonic aerodynamic heating environment. The results show that the ablation process of D6AC steel missile wing could be divided into three stages: aerodynamic heating, oxidation reaction, and shear stripping. The influence factors of the D6AC, steel wing ablation include the total temperature, Mach number, oxygen content, and water content. The higher the total temperature is, the more early the initial ablation time of wing is. The linear ablative rate of the D6AC steel wing is the result of the interaction of the Mach number, oxygen content, and water content. The higher the Mach number is, the larger the oxygen content is, and the larger the linear ablative rate of missile wing is. The influence of water content on the linear ablative rate of D6AC steel wing is the opposite.
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Liu, Gui Min, and Bin Li. "Study on the Electrical Arc Ablation Performance of Nano-SiCW Reinforced Cu-Matrix Composites." Advanced Materials Research 228-229 (April 2011): 509–13. http://dx.doi.org/10.4028/www.scientific.net/amr.228-229.509.

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The nano-SiC whisker reinforced Cu-matrix composites (SiCw/Cu) were obtained by powder metallurgy processes. The electrical arc ablation performance of composite SiCw/Cu was compared with copper H62 through stagnation-point ablation experiments. The results indicated that the qualities of copper H62 samples decreased with the increasing of ablating current; and the qualities of SiCw/Cu samples firstly increased and then decreased with the increasing of ablating current. Ablation mechanism research indicates the ablation hole of SiCw/Cu is smaller than copper H62, but it produced micro cracks because of different thermal expansion coefficients between nano-SiC whisker and Cu-matrix. At the same time, nano-SiC whisker happens to intricate oxidation reaction during arc ablation, it can reduce Cu-matrix smelts and sprays by absorbing arc energy. The anchoring effect and protection for the copper matrix of the uniformly dispersing nano-SiC whiskers have been considered to contribute the excellent arc ablation performance of composite SiCw/Cu.
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Angeline, Aruldass K., and Mahesh Shiva. "Radiofrequency Ablation Study." Pondicherry Journal of Nursing 12, no. 4 (2019): 102–4. http://dx.doi.org/10.5005/jp-journals-10084-12134.

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Hlavsa, Jan, Vladimír Procházka, Michal Crha, Iva Svobodová, Tomáš Andrašina, Petr Raušer, Lucie Urbanová, et al. "Healing dynamics of porcine pancreatic parenchyma after radiofrequency ablation - in vivo experimental pilot study." Acta Veterinaria Brno 81, no. 4 (2012): 427–31. http://dx.doi.org/10.2754/avb201281040427.

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Radiofrequency ablation is a tumour destruction method, widely used in human as well veterinary medicine. Recently, it has been applied to pancreatic disorder treatment. However, little is known about healing of the pancreatic parenchyma after radiofrequency ablation as it is important for the prevention of complications and treatment strategy. The aim of this experimental in vivo study on pigs was to evaluate the pancreatic parenchyma healing dynamics after damage by radiofrequency ablation. Radiofrequency ablations of the duodenal lobe of the pancreas were performed on 8 cross-bred laboratory pigs. They were euthanized in pairs at seven, fourteen, forty and eighty days after the procedure. Histological and cytological changes of the ablated zone were evaluated after autopsy. It was proved that pancreatic necrosis after radiofrequency ablation heals by means of fibrotic scar. There was no sign of exocrine and endocrine regeneration, respectively, during 80 days after the procedure. This is the first study verifying that the healing process of an ablation zone in the pancreatic parenchyma after radiofrequency ablation is similar to healing in the liver, lung, heart and other parenchymal organs.
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Goode, S. D., A. Chowdhury, M. Crockett, A. Beech, R. Simpson, T. Richards, and B. D. Braithwaite. "Laser and Radiofrequency Ablation Study (LARA study): A Randomised Study Comparing Radiofrequency Ablation and Endovenous Laser Ablation (810nm)." Journal of Vascular Surgery 52, no. 2 (August 2010): 522. http://dx.doi.org/10.1016/j.jvs.2010.06.097.

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Goode, S. D., A. Chowdhury, M. Crockett, A. Beech, R. Simpson, T. Richards, and B. D. Braithwaite. "Laser and Radiofrequency Ablation Study (LARA study): A Randomised Study Comparing Radiofrequency Ablation and Endovenous Laser Ablation (810nm)." European Journal of Vascular and Endovascular Surgery 40, no. 2 (August 2010): 246–53. http://dx.doi.org/10.1016/j.ejvs.2010.02.026.

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Dissertations / Theses on the topic "Ablation Study"

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Molinari, Alessio. "Designing a Performant Ablation Study Framework for PyTorch." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-285560.

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PyTorch is becoming a really important library for any deep learning practitioner, as it provides many low-level functionalities that allow a fine-grained control of neural networks from training to inference, and for this reason it is also heavily used in deep learning research, where ablation studies are often conducted to validate neural architectures that researchers come up with. To the best of our knowledge, Maggy is the first open-source framework for asynchronous parallel ablation studies and hyperparameter optimization for TensorFlow, and in this work we added important functionalities such as the possibility to execute ablation studies on PyTorch models as well as the generalization of feature ablation on any data type. This work also shows the main challenges and interesting points of developing a framework on top of PyTorch and how these challenges have been addressed in the extension of Maggy.
PyTorch blir ett oerhört viktigt bibliotek för alla utövare inom djupinlärning, detta eftersom PyTorch innehåller flertalet lågnivåfunktioner som möjliggör en finkorning kontroll av neurala nätverk - från träning till inferens. Av den anledningen används PyTorch också kraftigt i forskning om djupinlärning, där ablationsstudier ofta genomförs för att validera neurala arkitekturer som forskare framtagit. Så vitt vi vet är Maggy det första open-source ramverk för asynkrona parallella ablationsstudier och hyperparameteroptimering för TensorFlow. I detta arbete har vi lagt till viktiga funktioner såsom möjligheten att utföra ablationsstudier på PyTorch-modeller samt generalisering av funktionsablation för alla datatyper. Detta arbete upplyser också dem viktigaste utmaningarna och mest intressanta punkterna för att utveckla en ram ovanpå PyTorch och hur dessa utmaningar har hanterats i förlängningen av Maggy.
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Frassetto, Marco. "Study of nanostructured targets for plasma production via laser ablation." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/12058/.

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Metal nanowires (NWs) - nanostructures 20-100 nm in diameter and up to tens of micrometers long - behave as waveguides when irradiated with light with wavelength much greater than their diameter. This is due to collective excitations of free electrons (plasmons) in the metal which couple to light and travel on the surface of the nanowire. This effect can be used to efficiently absorb laser pulses to produce dense and hot plasma on special nanostructured targets with metal nanowires vertically aligned on the surface. In this thesis work, nanostructured targets with different parameters (length, diameter, metal and fabrication process) have been irradiated with infrared laser light. X-ray flux emitted by the cooling plasma is measured during irradiation, and the depth of craters formed on the target is measured later. This data is used to choose which target parameters are best for plasma production. Different targets are compared with each other and against a control, non-nanostructured (bulk) target. As will be shown, highly significant (> 5 sigma) differences are found between targets with different nanostructures, and between nanostructured and bulk target. This differences are very difficult to explain whithout accounting for the nanostructures in the targets. Therefore, data collected and analized in this thesis work supports the hypotesys that nanostructured targets perform better than bulk targets for laser plasma production purposes, and provides useful indications for optimization of NWS' parameters.
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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 spatial domain and a finite-difference algorithm resolves the time dependence. The numerical simulator is validated with a series of experiments performed on a tissue-equivalent material. Both the measured temperature distribution in the tissue sample and the electrode resistance as a function of time agree well with the theoretical predictions. The model is used to study the effect of the electrode geometry and the electrical excitation on the resulting lesion. Theoretical predictions for the time evolution of the lesion size and the electrode resistance are presented for the first time. Recommendations for the improvement of the RF ablation procedure are formulated.
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Roper, Ryan Todd. "A Study of Radiofrequency Cardiac Ablation Using Analytical and Numerical Techniques." Diss., CLICK HERE for online access, 2003. http://contentdm.lib.byu.edu/ETD/image/etd262.pdf.

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Haboub, Abdelmoula. "Study of ablation and implosion phases in cylindrical and star wire arrays." abstract and full text PDF (UNR users only), 2009. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3387809.

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Papanicolaou, Kyriakos. "Consequences of mitofusin ablation in cardiac myocytes. A genetic study in mice." Thesis, Boston University, 2013. https://hdl.handle.net/2144/12827.

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Thesis (Ph.D.)--Boston University PLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis or dissertation. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at open-help@bu.edu. Thank you.
Mitofusin-1 (Mfn-1) and mitofusin-2 (Mfn-2) are membrane-embedded mechanoenzymes involved in the remodelling and merging of the mitochondrial biomembrane. In differentiated cardiac myocytes, mitochondria occupy a third of the cell's volume and express both Mfn-1 and Mfn-2. The present thesis was aimed at exploring the roles of Mfn-1 and Mfn-2 specifically in cardiac myocytes using loss-offunction approaches in mice. We individually ablated either Mfn-1 or Mfn-2 specifically in cardiac myocytes. Ultramicroscopic analysis conducted in hearts of Mfn-1 KO or Mfn-2 KO mice revealed significant alterations in mitochondrial structure. Nevertheless, these knockout mice had normal heart function and a normal lifespan. Furthermore, Mfn-1 and Mfn-2 deficient mitochondria exhibited normal respiratory function in vitro. We also tested the susceptibility of Mfu-1 and Mfu-2 mitochondria against stress and unexpectedly found that the absence of these proteins conferred resistance to mitochondrial permeability transition (MPT). MPT reflects the loss of membrane integrity in mitochondria and is strongly associated with cell death. Using isolated adult cardiac myocytes we were able to demonstrate that the cell death in either Mfu-1 KO or Mfn-2 KO cells was delayed, consistent with the idea that MPT is attenuated in the absence of these proteins. We also utilized Mfn-2 KO mice to demonstrate that loss of Mfn-2 was associated with protection against cardiac ischemia/reperfusion injury, a stress model strongly linked to MPT. This work suggested for the first time that both Mfu-1 and Mfu-2 have important roles in the process of MPT. To incorporate these novel findings in context with the well-known role of mitofusins in membrane merging, I propose a working model where mitochondrial membrane fusion proceeds through formation of transient lipidic pores that compromise mitochondrial membrane integrity and serve as hotspots for MPT in conditions of stress. Lastly, we generated and characterized mice double-knockout (DKO) for Mfu-1 and Mfu-2. These mice are born in the expected ratios but undergo aberrant cardiac remodelling during the first week of their life and eventually succumb. The DKO mitochondria present multiple morphological and molecular abnormalities. This latter work illustrates that Mfn-1 and Mfn-2 operate interchangeably to regulate the early postnatal development of cardiac myocytes.
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Müller, Halina [Verfasser]. "Fluid-modulated radiofrequency ablation : an ex-vivo study in porcine liver / Halina Müller." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2012. http://d-nb.info/1021953172/34.

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Sujono, Susan. "Analytical study of steady state plasma ablation from soft X-ray laser target." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/10180.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
Includes bibliographical references (leaves 99-100).
by Susan Sujono.
M.Eng.
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Ong, Seok Ling. "Pilot study of hepatic microwave ablation using an extracorporeally perfused porcine liver model." Thesis, University of Leicester, 2015. http://hdl.handle.net/2381/36067.

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Introduction: Preclinical research into many aspects of microwave hepatic ablation has been traditionally conducted in in vivo studies. These are costly, can only be performed in laboratories with animal facilities and are associated with significant ethical issues. The main aim of this project was to study microwave ablation using an extracorporeally perfused porcine liver model to confirm that it accurately mimicked an in vivo model and could be used to investigate ablative techniques. Methods: Seventeen livers harvested from domestic pigs were subjected to extracorporeal normothermic autologous haemoperfusion followed by dissection of the hepatic artery and its branches to establish an effective procedure of liver procurement for subsequent experiments. A further seventeen livers in three experimental groups (control, microwave and Pringle groups) were perfused for six hours with tissue and blood samples collected at various time points for histological, biochemical and cytokine analyses. Seven livers in the control group did not undergo any ablation. Five livers in the microwave group underwent microwave ablations at three power settings after the first hour of perfusion for a fixed duration of two minutes per ablation. Five livers in the Pringle group underwent microwave ablation at the same power settings and for the same duration as the microwave group but the ablations were carried out with temporary cessation of blood flow to the liver. Results: Dissection of the hepatic artery and its bifurcation identified all the common variants and understanding these is crucial for successful liver perfusion. The livers were perfused at flows and pressures mimicking physiological levels with biochemical and blood gas analyses indicating normal function across all three experimental groups. The volume of the lesions increased with power of ablation in both the microwave and Pringle groups (p < 0.001 and p=0.003 respectively), with no significant differences in overall volume between the groups (p=0.275) but a greater transition zone volume in the microwave group (p=0.012). Apoptotic activities in the transition zone lessened towards the periphery of the ablation in both microwave and Pringle groups (p < 0.001 for both groups). There were significant elevations in the levels of circulating interleukin-6 and interleukin-8 over time with or without microwave ablation (p < 0.001 for both cytokines in both groups). Conclusion: An extracorporeally perfused porcine liver model has a role in the preclinical study of microwave ablation. The model can be reliably used to study the histological and physical profile of microwave lesions. It also permits the study of the heat sink effect of ablation. Overall, it has a considerable potential to reduce the number of in vivo preclinical studies required. However, the ability of this isolated organ (which has a relatively short perfusion lifespan) to study the systemic effect of a microwave ablation is limited. Further experiments involving other hepatic ablative techniques should be conducted using this model to fully establish its role as a preclinical liver ablation research tool.
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Ahmad, Muhammad Fateh. "A comparative study of the systemic inflammatory response to hepatic resection, microwave ablation, cryotherapy and radiofrequency ablation : which is safest and how much can we safely ablate?" Thesis, University of Leicester, 2010. http://hdl.handle.net/2381/9049.

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Liver cancer, whether primary or secondary, is a common clinical condition which carries a high mortality. Up until the last 50 years or so, patients with these conditions were thought to be untreatable, confined to alternative medicine and with extremely poor survival rates. Surgical resection was in theory a viable option for tumours limited to the liver such as hepatocellular carcinomas and colorectal liver metastases; however this was accompanied by unacceptable morbidity and mortality rates. Newer surgical techniques, combined with anaesthetic and technological advances then allowed a subset of these tumours to be removed more safely, either as a debulking procedure or in its entirety. Attempts to resect larger tumours or malpositioned tumours (i.e. approximating major hepatobiliary structures) continued to be associated with high complication rates. Advances in chemotherapy led to some improvement in survival, although with high morbidity. Over the last 3 decades, clinicians have sought alternative ways of treating these tumours, partly to increase efficacy of treatment, but also to increase resectability and operability. It was widely recognised that for larger tumours, or tumours involving several segments, there was a need to leave the maximum amount of normal hepatic parenchyma by selectively destroying or removing the tumour-affected portion of the liver only. The 3- dimensional anatomy of the liver segments as described by Couinaud (1952) greatly improved our understanding of what was possible to resect or ablate (Figure 1.1). Thus evolved the concept in in-situ ablation whether thermal, chemical or ultrasonic. More recently, neoadjuvant and adjuvant chemotherapy have been used in treating these patients to downstage tumours and make them amenable to resection and/or ablation. Percutaneous and minimal access ablation procedures have also made possible multiple visits to treat recurrence in the same areas of the liver, whilst leaving as much normal hepatic parenchyma as possible. These advances have been facilitated by technological breakthroughs in imaging techniques, particularly crosssectional computed tomography and MRI.
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Books on the topic "Ablation Study"

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Ramrakha, Punit, and Jonathan Hill, eds. Invasive electrophysiology. Oxford University Press, 2012. http://dx.doi.org/10.1093/med/9780199643219.003.0011.

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Abbreviations 542Mechanism of tachycardias 544Mechanism of arrhythmias 546The electrophysiology study 548Uses of the electrophysiology study 550Programmed ventricular stimulation 554New technologies 556Catheter ablation 558Complications of catheter ablation 560Trans-septal puncture 562Atrial arrhythmias: mechanism 564Ablation of atrial tachycardias ...
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Brady, Peter A. Evaluation and Treatment of Arrhythmias. Oxford University Press, 2012. http://dx.doi.org/10.1093/med/9780199755691.003.0043.

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Abnormal cardiac arrhythmias may be due to reentry, abnormal automaticity, or triggered activity. Reentrant rhythms may be microreentrant or macroreentrant. Ambulatory (Holter) monitoring is useful for the evaluation of both symptomatic and asymptomatic rhythm disturbances and their relationship to daily activity. Treadmill exercise testing is very useful in the evaluation of patients who present with bradycardia and symptoms of palpitations because it allows both documentation of the adequacy of heart rate response to exercise and the recording of the cardiac rhythm during exercise in a controlled setting with ECG monitoring. An electrophysiologic study is useful for assessing sinus node function and the cardiac conduction system and for attempting to induce atrial or ventricular arrhythmias that could explain the clinical presentation. Electrophysiologic study requires placement of electrode catheters in the heart to record and to stimulate heart rhythm. Several therapeutic options are available for heart rhythm disorders, including drug therapy, radiofrequency ablation, and device therapy.
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Book chapters on the topic "Ablation Study"

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Glover, Benedict M., Orla Buckley, Siew Yen Ho, Damian Sanchez-Quintana, and Pedro Brugada. "Cardiac Electrophysiology Study, Diagnostic Maneuvers and Ablation." In Clinical Handbook of Cardiac Electrophysiology, 39–102. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-40818-7_2.

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Hong, Kathryn L., Benedict M. Glover, Siew Yen Ho, Damian Sanchez-Quintana, and Pedro Brugada. "Cardiac Electrophysiology Study, Diagnostic Maneuvers and Ablation." In Clinical Handbook of Cardiac Electrophysiology, 31–80. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-74319-2_2.

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Irastorza, R. M., M. Trujillo, J. Martel Villagrán, and E. Berjano. "Radiofrequency Ablation of Osteoma Osteoide: A Finite Element Study." In VI Latin American Congress on Biomedical Engineering CLAIB 2014, Paraná, Argentina 29, 30 & 31 October 2014, 858–62. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-13117-7_218.

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Nomura, K., and Y. Yamada. "CEMS Study on Fe Films Deposited by Laser Ablation." In ICAME 2003, 637–41. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2852-6_90.

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Asaga, Sota, and Takayuki Kinoshita. "Prospective Study of RFA of Early Breast Cancer Without Resection." In Non-surgical Ablation Therapy for Early-stage Breast Cancer, 163–71. Tokyo: Springer Japan, 2016. http://dx.doi.org/10.1007/978-4-431-54463-0_16.

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Fan, Yongchang, Alexander G. Fitzgerald, and Hanchang Xu. "SPM Study of YBCO Films Prepared by Plasma Assisted Laser Ablation." In Modern Developments and Applications in Microbeam Analysis, 97–100. Vienna: Springer Vienna, 1998. http://dx.doi.org/10.1007/978-3-7091-7506-4_14.

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Abe, Hiroaki, Hiroyuki Kobayashi, Yoshio Katano, Takeo Iwai, and Naoto Sekimura. "XRD and HRTEM Study of Zirconia Nanoparticles Synthesized by Laser Ablation." In Materials Science Forum, 591–94. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-462-6.591.

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Patriciu, A., M. Awad, S. B. Solomon, M. Choti, D. Mazilu, L. Kavoussi, and D. Stoianovici. "Robotic Assisted Radio-Frequency Ablation of Liver Tumors – Randomized Patient Study." In Lecture Notes in Computer Science, 526–33. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11566489_65.

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Linte, Cristian A., Andrew Wiles, John Moore, Chris Wedlake, and Terry M. Peters. "Virtual Reality-Enhanced Ultrasound Guidance for Atrial Ablation: In vitro Epicardial Study." In Medical Image Computing and Computer-Assisted Intervention – MICCAI 2008, 644–51. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-85990-1_77.

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Tian, Zhen, Yanyan Cheng, Tong Dong, Xiang Gao, and Qun Nan. "Numerical Study for Lung Microwave Ablation in Different Thermal and Electrical Properties." In IFMBE Proceedings, 563–66. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-9035-6_104.

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Conference papers on the topic "Ablation Study"

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Foy, Renaud. "Polychromatic guide star: feasibility study." In High-Power Laser Ablation III. SPIE, 2000. http://dx.doi.org/10.1117/12.407359.

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Lunney, James G., and Brendan Doggett. "Langmuir probe study of laser ablation plume dynamics." In High-Power Laser Ablation 2006, edited by Claude R. Phipps. SPIE, 2006. http://dx.doi.org/10.1117/12.675528.

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Deng, Zhong-Shan, Jing Liu, and Ji-Ren Zhang. "Conformal RF Ablation to Reduce “Dead Region” With Adjuvant Injection of Magnetic Micro/Nano Particles: Feasibility Study." In 2007 First International Conference on Integration and Commercialization of Micro and Nanosystems. ASMEDC, 2007. http://dx.doi.org/10.1115/mnc2007-21267.

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Radiofrequency (RF) ablation is a minimally invasive technique for tumor treatment. Intended benefits of oncological RF ablation include the availability of tumor treatment in nonsurgical candidate, minimal risk to patient, reduced morbidity and shorter recovery period compared with those after conventional surgery, and the potential for treatment on an outpatient basis. RF ablation, by producing heat energy that raises the temperature of the target tissue to a degree sufficient to cause thermally mediated coagulation necrosis, has been shown to be remarkably effective for thermal ablation of small tumors. Although RF hyperthermia has been successful in ablating small tumors, further optimization of the ablation technique is required to induce the larger volumes of coagulation that are necessary to treat larger tumors. In addition, due to the extremely irregular shape of tumor in clinics, the conventional RF ablation technique is hard to produce a conformal lesion to exactly enwrap the tumor as could as possible. This may lead to “dead region” within the area between RF probes and thus a failed treatment. To obtain a conformal treatment of complex tumor, strategies to flexibly control the size and shape of the ablated zone are desired.
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Anzalone, R., B. W. Barr, R. R. Upadhyay, and O. A. Ezekoye. "Use of a Quasi-Steady Ablation Model for Design Sensitivity With Uncertainty Propagation." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-63677.

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Sensitivity analysis and design calculations are often best performed using low-order models. This work details work done on adding complementary pieces to a low-order, quasi-steady-state ablation model to facilitate uncertainty propagation. The quasi-steady-state ablation model is a one-dimensional, quasi-steady-state, algebraic ablation model that uses finite-rate surface chemistry and equilibrium pyrolysis-gas-production submodels to predict surface recession rate. The material response model is coupled to a film-transfer boundary layer model to enable the computation of heat and mass transfer from an ablating surface. For comparison to arc jet data, a simple shock heated gas model is coupled. A coupled model consisting of submodels for the shock heated gases, film heat and mass transfer, and material response is exercised against recession rate data for surface and in-depth ablators. Comparisons are made between the quasi-state-state ablation model and the unsteady ablation code, Chaleur, as well as to other computations for a graphite ablator in arcjet facilities. The simple models are found to compare reasonably well to both the experimental results and the other calculations. Uncertainty propagation using a moment based method is presented. The results of this study are discussed, and conclusions about the utility of the method as well as the properties of the ablation code are drawn.
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Karlitskaya, Natallia S., Dirk F. de Lange, Rene Sanders, and Johan Meijer. "Study of laser die release by Q-switched Nd:YAG laser pulses." In High-Power Laser Ablation 2004, edited by Claude R. Phipps. SPIE, 2004. http://dx.doi.org/10.1117/12.546674.

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Nejedl, Volkmar, Thomas Witke, Andreas Lenk, Michael Panzner, Stefan Baunack, and Klaus Wetzig. "Laser modification of iron under atmospheric conditions: a study on target surface composition and laser-induced plasma." In High-Power Laser Ablation, edited by Claude R. Phipps. SPIE, 1998. http://dx.doi.org/10.1117/12.321580.

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Barmashenko, Boris D., Victor Rybalkin, Arje Katz, and Salman Rosenwaks. "Parametric study of the Ben-Gurion University efficient chemical oxygen-iodine laser." In High-Power Laser Ablation 2004, edited by Claude R. Phipps. SPIE, 2004. http://dx.doi.org/10.1117/12.548150.

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Zhu, Jianjie, Liping Zheng, and Yingxiu Cao. "Study on Ablation Wear of Gun." In 2017 2nd International Conference on Materials Science, Machinery and Energy Engineering (MSMEE 2017). Paris, France: Atlantis Press, 2017. http://dx.doi.org/10.2991/msmee-17.2017.117.

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Shigemori, Keisuke, Tatsuhiko Sakaiya, Kazuto Otani, Shinsuke Fujioka, Mitsuo Nakai, Hiroshi Azechi, Hiroyuki Shiraga, et al. "Experimental study on ablative stabilization of Rayleigh-Taylor instability of laser-irradiated targets." In High-Power Laser Ablation 2004, edited by Claude R. Phipps. SPIE, 2004. http://dx.doi.org/10.1117/12.548818.

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Chen, Ming-Fei, Yu-Pin Chen, and W. T. Hsiao. "The study of the acrylic material drilling used by the CO 2 laser." In High-Power Laser Ablation 2004, edited by Claude R. Phipps. SPIE, 2004. http://dx.doi.org/10.1117/12.549017.

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Reports on the topic "Ablation Study"

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Liu, Chunyi. A study of particle generation during laser ablation with applications. Office of Scientific and Technical Information (OSTI), January 2005. http://dx.doi.org/10.2172/860383.

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Park, J., C. M. Rouleau, and D. H. Lowndes. Study of substrate diffusion in epitaxial n-type CdSe films grown on GaAs (001) by pulsed laser ablation. Office of Scientific and Technical Information (OSTI), April 1998. http://dx.doi.org/10.2172/672107.

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SEIDEL CM, JAIN J, and OWENS JW. LASER ABLATION-INDUCTIVELY COUPLED PLASMA-ATOMIC EMISSION SPECTROSCOPY STUDY AT THE 222-S LABORATORY USING HOT-CELL GLOVE BOX PROTOTYPE SYSTEM. Office of Scientific and Technical Information (OSTI), February 2009. http://dx.doi.org/10.2172/949753.

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LOCKREM LL, OWENS JW, and SEIDEL CM. LASER ABLATION-INDUCTIVELY COUPLED PLASMA-ATOMIC EMISSION SPECTROSCOPY STUDY AT THE 222-S LABORATORY USING HOT-CELL GLOVE BOX PROTOTYPE SYSTEM. Office of Scientific and Technical Information (OSTI), March 2009. http://dx.doi.org/10.2172/950468.

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Ames, D. E., and G. Tuba. Epidote-amphibole and accessory phase mineral chemistry as a vector to low-sulphide platinum group element mineralization, Sudbury: laser ablation ICP-MS trace element study of hydrothermal alteration. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2015. http://dx.doi.org/10.4095/296695.

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Tuba, G., and D. E. Ames. Trace element signature of hydrothermal alteration assemblages (epidote, allanite, actinolite, titanite) in the footwall of the Sudbury Igneous Complex: A laser ablation ICP-MS trace element vectoring and fertility study. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2015. http://dx.doi.org/10.4095/297051.

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Sauppe, Joshua Paul, Eric Nicholas Loomis, Elizabeth Catherine Merritt, Tana Cardenas, Brian Michael Haines, and Paul Andrew Bradley. Preliminary Design Studies for a Hydro-Growth Radiography Platform to Study the Double Shell Ablator Joint. Office of Scientific and Technical Information (OSTI), May 2019. http://dx.doi.org/10.2172/1511644.

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