Method of introducing ultrasonic drug and apparatus thereof

1. An ultrasonic drug introducing apparatus comprising:

a low frequency pressurizing unit that irradiates a low frequency sound wave which has a frequency of several KHz onto a subject;

a high frequency pressurizing unit that irradiates a high frequency ultrasonic wave for introduction of a drug and which has a frequency in a range of several hundred KHz to several MHz onto a target region of the subject;

a timing adjusting unit that adjusts a timing of irradiating the low frequency sound wave onto the subject and a timing of irradiating the high frequency ultrasonic wave onto the subject, and irradiates the high frequency ultrasonic wave for introduction of the drug onto the target region of the subject in a time period when, with the low frequency sound wave irradiated onto the subject, a pressure by the low frequency sound wave reaches a positive pressure of 1.05 atmospheric pressure or more, thereby to promote introduction of the drug into the target region;

wherein the low frequency pressurizing unit has an unfocused type of low frequency oscillator having ends and that irradiates the low frequency sound wave onto a wide region of the subject,

the high frequency pressurizing unit has at least two phased array sound sources, a plurality of oscillators being disposed in a two-dimensional array in each phased array sound source, and

the respective phased array sound sources are disposed on both ends of the low frequency oscillator, respectively.

2. The ultrasonic drug introducing apparatus according to claim 1 ,

wherein the high frequency pressurizing unit has a focused type of high frequency oscillator that focuses the high frequency ultrasonic wave and irradiates the high frequency ultrasonic wave onto the subject, and

the high frequency oscillator has a spherical surface piece shape.