High-intensity focused ultrasound HIFU

The presence of particulate matter — especially that of trapped vapour gas nuclei in their crevices and recesses — has also been found to lower the cavitation threshold. This is required under these conditions are of paramount importance in the clinical field, where ultrasound Is widely used in applications such as high-intensity focused ultrasound (HIFU),... 

Schafer, M.E., Gessert, J. and Moore, W. (2005) Development of a high intensity focused ultrasound (HIFU) hydrophone system. Proceedings of the IEEE Ultrasonics Symposium, Rotterdam, The Netherlands, 18-21 September 2005, 1739 2. 

Epidemiology of Breast Cancer 221 Interstitial Laser Therapy (ILT) 222 Radiofrequency Ablation (RFA) 223 High-Intensity Focused Ultrasound (HIFU) 224... 

High-intensity focused ultrasound (HIFU) has the same principle as conventional ultrasound. Many piezo elements emit US beams, which are brought to a tight focus. There, focal energy deposition by conversion of mechanical energy into heat causes protein denaturation and tissue necrosis. Arrest of... 

F. Kallel, R. J. Stafford, R. E. Price, R. Righetti, J. Ophir and J. D. Hazle, The feasibility of elastographic visualization of HIFU-induced thermal lesions in soft tissues. Image-guided high-intensity focused ultrasound, Ultrasound Med. Biol., 1999, 25, 641-647. 

Ultrasound waves produce a variety of thermal and cavitational effects in biological tissues [1]. Given their widespread use in medical diagnostic and treatment since the sixties [2], stringent standards have been developed to keep the intensity of these waves within safe levels [3], Thus, calibration techniques have also been actively developed such as wideband hydrophones, calorimetric, optical and radiation-force measurement systems [3], When the intensity increases, as it is the case in HIFU (high intensity focused ultrasound) and lithotripters, calibration becomes more delicate [1],... 

Local hyperthermia uses very high heat. Radio waves, microwaves, ultrasound waves, and other forms of energy can be used to heat the local area. When ultrasound is used, the technique is called high intensity focused ultrasound, or HIFU. The heat may be applied using different methods ... 

---