The computation analysis indicates that increasing the aperture of the concave focusing transducer, decreasing it's geometric focal length or raising it's central working frequency can improve the transverse and axial resolutions of the system simultaneously, but changing the dividing proportion of the transducer affects the two kinds of resolution differently. On compromisingly considering several factors including the exciting mode, the focusing ability and the radiation force effect, the concave focusing transducer should be divided into two equal-area parts.

計(jì)算研究表明：增大凹球面換能器的口徑、減小幾何焦距和提高中心頻率均可以提高系統(tǒng)的側(cè)向分辨率和軸向分辨率日韩超清极品无码不卡视频；但改變凹球面換能器的分割比例對(duì)兩種分辨率影響不盡相同綜合考慮超聲換能器激勵(lì)欧美日韩在线视频免费观看、聚焦性能以及產(chǎn)生的輻射力效果等因素，則換能器應(yīng)按等輻射面積原則分割為宜模特屄视频。