{"product_id":"extracorporeal-focused-ultrasound-therapy-von-xenia-rosemarie-reit","title":"Extracorporeal Focused Ultrasound Therapy","description":"\u003cp\u003eA high intensity focused ultrasound (HIFU) treatment has a very complex therapy planning structure. In this thesis we introduce a workflow on the basis of a decomposition of the therapy plan into controllable but coupled subproblems. Under certain assumptions, including the decoupling of these subproblems, we first concentrate on the maximisation of the sonication area on a patient surface. The sound waves form a double cone in the center of which the main energy transfer to the tumour tissue takes place. A maximally opened cone allows for the use of as many degrees of freedom as possible which represents a good basis for further computations. The cone is restricted by so called areas of risk, which are healthy tissue domains. These areas should not be affected by the ultrasound.  For a future simulation it is necessary to know about the temperature distribution in the focal points depending on the available parameters. We establish a short-cut model to overcome the time-consuming problem of solving the nonlinear wave equation at each data point. This short-cut model characterises the diffusion of heat using the heat equation. We solve the heat equation by using Green's functions.\u003c\/p\u003e\u003cdiv class=\"aw-variant-hidden-subtitle-div\" id=\"aw-variant-subtitle-9783639389449\"\u003e\u003ch3\u003ePositioning and Thermal Effect of the Ultrasonic Field\u003c\/h3\u003e\u003c\/div\u003e","brand":"Autorenwelt Shop","offers":[{"title":"Softcover - 9783639389449","offer_id":39482395590749,"sku":"9783639389449","price":29.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0622\/files\/72eb98d0-143d-4c8a-b515-db06276319e3.jpg?v=1773553356","url":"https:\/\/shop.autorenwelt.de\/products\/extracorporeal-focused-ultrasound-therapy-von-xenia-rosemarie-reit","provider":"Autorenwelt Shop","version":"1.0","type":"link"}