Abstract: The invention discloses a method and apparatus to control the shaping change of Shape-Memory-Alloy (SMA). The piece-wised current drain control device is designed to independently deliver current to stimulate sectional SMA but not the entire one. The invention is also successfully implemented on an automatic light sensitive aperture control device to simulate the light response of a pupil. The control technique can extend the application potential of SMA toward precise actuation, aeronautical applications, surgical tools, or biomedical applications such as artificial organ or muscles.

Abstract: An artificial sphincter system having: (1) a hollow object, which has the ability of contraction and expansion; (2) a shape memory alloy (SMA), which is connected with the hollow object, changes its shape to imitate the motion of human muscle by applying different electric current; (3) an electric power to provide different amounts of electric current to the shape memory alloy and let it contract or expand to control the motion of the hollow object to imitate the motion of human muscle; and (4) a photo resistor added between the electric power and the shape memory alloy, which senses the brightness of surrounding light and controls A/D (analog-to-digital) values of the electric power to cause different conditions of contraction and expansion of each part of the shape memory alloy.

Abstract: The present invention proposes a magnetic nanocomposite with multi-biofunctional groups, which comprises a core and a shell wrapping the core, wherein the core contains magnetic nanoparticles, and wherein the shell is made of a conductive polymer with multi-biofunctional groups where a medicine, an antibody or a fluorescent label can be attached.

Abstract: Ultrasonic energy has been proven that at suitable frequency range (670-kHz to 2-MHz), ultrasound can be focused to a specific target, and the concentrated energy has sufficient high acoustic pressure so that capable of inducing localized blood-brain barrier (BBB) disruption, which has an important implication on noninvasively delivering drug into brain.

Abstract: The invention discloses a method and apparatus to control the shaping change of Shape-Memory-Alloy (SMA). The piece-wised current drain control device is designed to independently deliver current to stimulate sectional SMA but not the entire one. The invention is also successfully implemented on an automatic light sensitive aperture control device to simulate the light response of a pupil. The control technique can extend the application potential of SMA toward precise actuation, aeronautical applications, surgical tools, or biomedical applications such as artificial organ or muscles.

Abstract: The present invention relates to a kind of artificial sphincter system, which takes shape memory alloy (SMA) as its motion device, and then cooperates with controlled circuit to imitate the motion of human sphincter, especially in imitating iris. The present invention can be used in a human body, a robot or a machine.

Abstract: The invention is disclosed to design a real-time pulse/echo system to perform 1-D real-time temperature measurement and integrate in the high-intensity focused ultrasound system. In the invention, a modified echo-time shifting algorithm is developed to calculate the corresponding phase shift from echo signal, which correlates with the instantaneous temperature change during heating process.

Abstract: The invention is to a biomedical used multiple-channel hemispherical focused ultrasound phased array apparatus. The invention comprises of a graphic user interface, digital multiple channel phase control kernel, multiple channel driving system, and impedance matching module, power feedback device, as well as the hemispherical low-frequency ultrasound phased array. The invention also serves as a good platform reference to develop a focused ultrasound system in the assisted brain drug delivery application.

Abstract: The invention disclosed that the multiple frequency ultrasound apparatus using unique transducer will contain many actuations module, a coupled circuit and a transducer. Each actuation module can separately output the signal of the different frequency, the coupled circuit connecting the actuation module for coupling with the signal of the different frequency. The transducer can receive the signal of the multiple frequencies, then for outputting the multiple ultrasound frequency by the way of transferring from the electrical energy to the mechanical energy.

Abstract: The invention disclosed that the multiple frequency ultrasound apparatus using unique transducer will contain many actuations module, a coupled circuit and a transducer. Each actuation module can separately output the signal of the different frequency, the coupled circuit connecting the actuation module for coupling with the signal of the different frequency. The transducer can receive the signal of the multiple frequencies, then for outputting the multiple ultrasound frequency by the way of transferring from the electrical energy to the mechanical energy.

Abstract: A medical system and method for treating a disorder of a subject by thermal ablation, e.g., focused ultrasound thermal ablation, are provided. The method includes obtaining medical images that include at least one image of subject's chest and ribs to reconstruct a three-dimensional chest-rib distribution; and applying ultrasound waves on a target point beyond the subject's ribs by selectively activating one or more elements of an ultrasound phased array to avoid ultrasonic energy absorption or reflection by an intervening rib based on a calculation of a relationship between the three-dimensional chest-rib distribution and an acoustic emission direction.