In the 1960 s a firm rationale was developed for utilizing raised temperatures to treat deadly illness and there has been a constant growth of the field since. A significant constraint exists in our capability to heat human tumours, particularly those sited deep in the body, with a reasonable degree of temperature uniformity. This issue has actually led to engineers and physicists collaborating carefully with biologists and clinicians towards the common objective of developing and testing the scientific capacity of this interesting treatment method. The goal of the physicist and engineer is to develop acceptible techniques of heating tumQur masses in as many websites as possible to healing temperatures preventing excessive heating of regular structures and, at the same time, getting the temperature level distribution throughout the heated volume. The problem is amplified by both the theoretical and technical limitations of heating approaches and devices. The modelling of external deposition of energy in tissue and knowledge of tissue perfusion are ill-defined. To this must be included the conceptual trouble of defining a thermal dosage. The NATO course was developed to offer a basis for the combination of physics and technology relevant to the development of hyperthermia. There were 48 lectures covering the theoretical and practical elements of system design and evaluation, including, as far as possible, all the strategies of present interest and value in the field.
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