过零点系数加权的超声平面波复合成像算法
首发时间:2016-03-30
摘要:平面波超声成像算法运用广泛,但成像质量较差。相干平面波复合成像算法通过多个角度的平面波成像的叠加,提高成像质量,但忽略了不同角度平面波之间的关系。本文对不同角度平面波的成像结果的计算过零点系数,对平面波成像复合叠加后的结果进行加权成像,提出过零点系数加权的平面波复合成像算法(ZF-CPWC)。Field II仿真结果表明该方法相对于CWPC成像算法,可改善成像的分辨率,降低旁瓣,并将对比度提高了3.93dB。
关键词: 生物医学仪器 超声成像 相干平面波复合 过零点系数
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Ultrasonic Coherent Plane-wave Compounding imaging algorithm weighted by Zero-crossing Factor
Abstract:Plane-wave ultrasound imaging has been widely used in many frontier research areas in medical ultrasound due to its ultra-high frame rate,but its image quality is low.Coherent Plane-wave Compounding(CPWC) imaging algorithm can enhance the image quality, by means of summing the results derived from PWI with different transmit angles, but the relation of this results is not considered. According to results ,the Zeros-cross Factor(ZF) has been calculated as the adaptive weight.The method named ZF-CPWC has been proposed which used ZF to weight the CPWC. Field II simulation results demonstrated that compared with CPWC,the new method can improve the imaging resolution,reduce the sidelobe and increase contrast by 3.93dB.
Keywords: Biomedical instrument ultrasound imaging Coherent Plane-wave Compounding Zero-crossing Factor
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