Analysis of Power Deposition Patterns and Ultrasonic Phased Arrays for Localized Hyperthermia PDF Download
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Author: Kenneth Blair Ocheltree
Publisher:
ISBN:
Category :
Languages : en
Pages : 444
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Author: Kenneth Blair Ocheltree
Publisher:
ISBN:
Category :
Languages : en
Pages : 444
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Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 468
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Author: Michel Gautherie
Publisher: Springer Science & Business Media
ISBN: 3642487122
Category : Medical
Languages : en
Pages : 225
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Book Description
When in the future improved and more flexible heating equipment becomes available, and when hyperthermia is applied more routinely, computerized simulations of treatments will become commonplace, as they are in radia tion therapy. For hyperthermia, however, such simulations will be used not only for the traditional role of planning patient treatment, but also for three other applications not needed in radiation therapy - the comparative evalu ation of equipment, feedback control during treatment, and the post-treat ment evaluation of therapy. The present simulations of hyperthermia are crude and simple when compared with what is required for these future ap plications, a fact which indicates the nedd for considerable research and de velopment in this area. Indeed, this research is proceeding rapidly within the hyperthermia community, whre three-dimensional power deposition and temperature calculations have just become available for realistic patief\t anatomies. Of equal significance are the even more rapid development in diagnostic imaging for the determination and display of patient anatomy and blood flow rates - information required for the planning of realistic hyperthermia treatment. These simulations will be very valuable tools which can be used to great ad vantage when combined with data obtained from treatments of patients.
Author: S.B. Field
Publisher: Springer Science & Business Media
ISBN: 9400935978
Category : Medical
Languages : en
Pages : 672
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In the 1960s a firm rationale was developed for using raised temperatures to treat malignant disease and there has been a continuous expansion of the field ever since. However, a major limitation exists in our ability to heat human tumours, especially those sited deep in the body, with a reasonable degree of temperature uniformity. This problem has resulted in engineers and physicists collaborating closely with biologists and clinicians towards the common goal of developing and testing the clinical potential of this exciting treatment modality. The aim of the physicist and engineer is to develop acceptible methods of heating tumQur masses in as many sites as possible to therapeutic temperatures avoiding excessive heating of normal structures and, at the same time, obtaining the temperature distribution throughout the heated volume. The problem is magnified by both the theoretical and technical limitations of heating methods and devices. Moreover, the modelling of external deposition of energy in tissue and knowledge of tissue perfusion are ill-defined. To this must be added the conceptual difficulty of defining a thermal dose. The NATO course was designed to provide a basis for the integration of physics and technology relevant to the development of hyperthermia. There were 48 lectures covering the theoretical and practical aspects of system design and assessment, including, as far as possible, all the techniques of current interest and importance in the field.
Author: Emad S. A. Ebbini
Publisher:
ISBN:
Category :
Languages : en
Pages : 142
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Author: Eduardo Moros
Publisher: Taylor & Francis
ISBN: 1439848920
Category : Medical
Languages : en
Pages : 375
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Book Description
The field of thermal therapy has been growing tenaciously in the last few decades. The application of heat to living tissues, from mild hyperthermia to high-temperature thermal ablation, has produced a host of well-documented genetic, cellular, and physiological responses that are being researched intensely for medical applications, particularly fo
Author: IEEE Engineering in Medicine and Biology Society. Conference
Publisher:
ISBN:
Category : Biomedical engineering
Languages : en
Pages : 774
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Author: Michel Gautherie
Publisher: Springer Science & Business Media
ISBN: 3642746330
Category : Medical
Languages : en
Pages : 367
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Book Description
The development of equipment capable of producing and monitoring safe, effective and predictable hyperthermia treatments represents a major challenge. The main problem associated with any heating technique is the need to adjust and control the distribution of absorbed power in the tissue during treatment. Power distribution is considered adequate only when tumor tissue can be maintained at the required hyperthermic levels while, at the same time, healthy tissue is not overheated. This problem is particularly crucial when external heating devices are used to produce hyperthermia. Ex ternal hyperthermia refers to those methods which supply heat to tumor tissue in an external, noninvasive manner, as opposed to internal hyperther mia by which heat is supplied to tumor tissue in situ. Until recently, most of the technical developments and clinical trials of ther motherapy for superficial and deep tumors have been based on elec tromagnetic systems. Presently, there is increasing interest in the use of ultra sound to accomplish these goals. Electromagnetic techniques of external thermotherapy include radiative, capacitive, and, to a lesser extent, inductive procedures. Recent designs for radiative applicators have incorporated microstrip structures. These have the advantage of being compact and lightweight compared with dielectrically loaded waveguide applicators.
Author: Alan J. Fenn
Publisher:
ISBN:
Category :
Languages : en
Pages : 11
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Elevated cell tissue temperature (hyperthermia) due to radio frequency (RF) energy absorption is known to produce an improved response for malignant tumors in humans when applied in combination with other anticancer modalities. However, clinical studies in thermotherapy have shown the difficulty of localizing RF energy deposition in malignant tissue deep within the body without damaging surrounding healthy tissue. The study presented in this article involves a preclinical investigation of adaptive feedback and computer control of amplitude and phase from coherent RF antenna arrays to provide improved distribution of electromagnetic energy deposition in the body.
Author: IEEE Engineering in Medicine and Biology Society. Annual Conference
Publisher:
ISBN:
Category : Biomedical engineering
Languages : en
Pages : 774
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