Abstract: A device and method for improving light penetration is provided and applied to human tissues for biophotonics technology. When a laser beam penetrates a tissue inside a human body for biophotonics technology, ultrasounds generated by a high intensity focused ultrasound (HIFU) probe are focused to form an acoustic vortex around a forward path of the laser beam, causing the laser beam to pass through a central silent vortex action region of the acoustic vortex. A virtual optical waveguide is formed on surrounding tissues in the forward path of the laser beam through the acoustic vortex, to increase fluence of the laser beam through the acoustic vortex, and improve light penetration of the laser beam.

Abstract: A balloon catheter system assisted by ultrasound and microbubbles and a method for vasodilation are provided. The system includes: a controller; a sensor catheter; a highly focused ultrasound probe, and the highly focused ultrasound probe and the sensor catheter is connected to the controller; and a balloon catheter. The method of vasodilation includes: providing a sensor catheter into a blood vessel, and controlling a highly focused ultrasound probe to focus at a hardened portion of the blood vessel; removing the sensor catheter from the blood vessel and inserting a balloon catheter into the blood vessel; infusing microbubbles into the balloon catheter and controlling the highly focused ultrasound probe to start working to destroy a calcification point of the hardened portion of the blood vessel, and smoothly inflating the balloon catheter at the hardened portion of the blood vessel.

Abstract: An ultrasonic device for transversely manipulating drug delivery carriers includes a driving unit and a transducer. The transducer is electrically connected to the driving unit and has a piezoelectric sheet in a curved shape. The piezoelectric sheet includes a plurality of channels, and a phase difference is generated between every two of the channels by the driving unit for producing an acoustic vortex.

Abstract: An ultrasonic device for transversely manipulating drug delivery carriers includes a driving unit and a transducer. The transducer is electrically connected to the driving unit and has a piezoelectric sheet in a curved shape. The piezoelectric sheet includes a plurality of channels, and a phase difference is generated between every two of the channels by the driving unit for producing an acoustic vortex.