Abstract: The present invention discloses an apparatus for human interfaces of an ultrasonic diagnostic system based on a personal computer. The apparatus can be applied in the input end and output end of the system. Only the normal keyboard of a personal computer is needed for the present invention, instead of further designing a customized control interface used in prior art. Besides, a digital display controller is used to control output signals of a scanner, which are stored in a video memory. The output frequency of the digital display controller is the same with that of the personal computer. Therefore, a lot of unnecessary transformations between different video signal formats seen usually in prior art can be avoided. Besides, system complexity and manufacturing cost will be reduced, and the power consumption will be also saved.

Abstract: The present invention discloses an apparatus for human interfaces of an ultrasonic diagnostic system based on a personal computer. The apparatus can be applied in the input end and output end of the system. Only the normal keyboard of a personal computer is needed for the present invention, instead of further designing a customized control interface used in prior art. Besides, a digital display controller is used to control output signals of a scanner, which are stored in a video memory. The output frequency of the digital display controller is the same with that of the personal computer. Therefore, a lot of unnecessary transformations between different video signal formats seen usually in prior art can be avoided. Besides, system complexity and manufacturing cost will be reduced, and the power consumption will be also saved.

Abstract: This invention discloses a composite ultrasonic therapeutic transducer, which comprises a piezoelectric ceramic having a positive electrode and a negative electrode, and a metallic housing, and is characterized in that the piezoelectric ceramic is formed with at least one recess which is open to the negative electrode attached onto the metallic housing. Thus, the transducer has a higher impedance and a wider bandwidth, and is easy to reach a well impedance matching with a driver.