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HIFU beams are precisely focused on a small region of diseased tissue to locally deposit high levels of energy. Focused ultrasound may be used to generate highly localized heating to treat cysts and tumors (benign or malignant). This is known as Magnetic Resonance guided Focused Ultrasound (MRgFUS) or High Intensity Focused Ultrasound (HIFU).
The Sonalleve high frequency focused ultrasound uses a special transducer to focus a beam of ultrasound waves on to the fibroid located within the body. The focused ultrasound waves generate high temperatures within smaller areas. The temperature when maintained for sufficient a period of time results in the ablation of the fibroids.
Turning off ultrasound allows for hydrogel to restore its matrix. Of the existing ultrasound modalities, focused ultrasound has been used extensively in drug delivery research. [33] [34] High-Intensity Focused Ultrasound (HIFU) and Low-Intensity Focused Ultrasound are the two main techniques used in inducing drug release from smart hydrogels. [43]
Ultrasound can ablate tumors or other tissue non-invasively. [4] This is accomplished using a technique known as high intensity focused ultrasound (HIFU), also called focused ultrasound surgery. This procedure uses generally lower frequencies than medical diagnostic ultrasound (250–2000 kHz), but significantly higher time-averaged intensities.
High intensity focused ultrasound (HIFU) was first used in the 1940s and 1950s in efforts to destroy tumors in the central nervous system. Since then, HIFU has been shown to be effective at destroying malignant tissue in the brain, prostate, spleen, liver, kidney, breast, and bone. [38]
Haifu is a medical device manufacturer, producing High-intensity focused ultrasound (HIFU) equipment. The HIFU machines produced are CE certified. [3] The company sells in foreign markets and was noted in a China Daily article as an example of Chinese businesses manufacturing goods of higher sophistication for the international market. [3]
However, scanning the acoustic field with a hydrophone suffers from several limitations, giving rise to supplementary evaluation methods such as the schlieren imaging. The importance of the schlieren imaging technique is prominent in High Intensity Focused Ultrasound (HIFU) research and development. [5] Advantages of schlieren imaging include:
HIFU uses an ultrasound device that is able to precisely focus ultrasound waves at a target tissue or specific group of cells. At the focus of this ultrasound energy, the temperature can reach excesses of 80 °C which results in nearly spontaneous coagulative necrosis or cell death without harming neighboring cells.