Medical ultrasound transducer can be divided into diagnostic ultrasound and therapeutic ultrasound. Diagnostic ultrasound is ultrasonic frequency of 1 to 10 MHz.The low-energy form is applied to the clinic, mainly for the purpose of extracting biological information, and Pzt material stripe piezo ceramic requires the resolution to be as high as possible. The intensity of the diagnostic ultrasound is small enough to generally produce irreversible biological changes in the tissue through which the ultrasound passes without causing damage to the biological tissue. In contrast to diagnostic ultrasound, therapeutic ultrasound acts on biological tissue in the form of low-frequency, high-energy , when a certain intensity of ultrasound propagates through the body.When an interaction occurs with a biological tissue, which is causing a change in the function or structure of the organism,The purpose is piezoelectric ceramics of disease treatment.
Ultrasound therapy is divided into ultrasound therapy, ultrasound hyperthermia and high intensity focused ultrasound is depending on the intensity used.Treatment, etc. Physiotherapy ultrasound uses less energy, the purpose of which is to produce beneficial, ultrasound-irradiated tissue usually reversible changes that promote tissue wound healing or stimulate certain types of active cells to restore the body to positive function. Ultrasound piezoelectric plates sensor is based on normal human cells can withstand temperatures up to 45 °C, while tumor tissue cells If it continues at 43 C for a period of time is usually more than tens of seconds, irreversible damage will occur.The principle of the large tissue is warmed to 43-45 °C, heating time is at least 30 minutes, resulting in lethal swelling is the treatment of tumor tissue. High intensity focused ultrasound (HIFu)Therapeutic technology uses Hifu treatment ultrasound therapy to focus on the low-energy ultrasound emitted by the ultrasonic generator. under the action of ultrasonic mechanical (mechanical) effect, thermal effect and cavitation effect.A technique for therapeutic purposes is this treatment technology has been applied in many medical fields, and its main package extracorporeal shock wave lithotripisy (EsWL) therapy and HIFu swelling Tumor treatment, etc. Due to HIFU treatment, non-invasive, non-radiative, effective, safe, and post-treatment patients rehearsal the other characteristics, HIFU piezoelectric ceramic element is widely used in the urinary calculi, tumor treatment, and HIFU,As a new local treatment, its clinical application and research are in the ascendant.