Technical Aspects of Hyperthermia
Any attempt to cover, in one chapter, the physiology and physics of heating tumors, as well as the means of measuring tumor and normal tissue temperatures, is a difficult undertaking. It would not be unreasonable to write several treatises on these subjects. For example, the two major competing physical techniques that apply to localized heating, electromagnetics and ultrasound, each merit thorough expositions. To do so would require two textbooks, and I would hardly be competent to be the author of either. Therefore, to stay within space (and my own) limitations, I am going to be very selective in the choice of topics to be covered. As a guide to determining appropriate subject matter, I am taking what might be described as a consumer’s viewpoint. I don’t mean the ultimate consumer, the patient, who rarely is in a position to choose the treatment, but I am thinking of the physician. His or her questions relate not so much to specific aspects of the design of various systems, but to the machines’ capabilities and limitations, i.e., to their utility in a clinical setting. In Table 6.1 I have summarized much of the information available regarding advantages and disadvantages of various heating modalities.
KeywordsTechnical Aspect Fatty Tissue Localize Heating Blood Flow Rate Regional Heating
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