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首页> 外文期刊>Ultrasound in Medicine and Biology >A freehand elastographic imaging approach for clinical breast imaging: system development and performance evaluation.
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A freehand elastographic imaging approach for clinical breast imaging: system development and performance evaluation.

机译:用于临床乳房成像的徒手弹性成像方法:系统开发和性能评估。

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摘要

A prototype freehand elastographic imaging system has been developed for clinical breast imaging. The system consists of a fast data acquisition system, which is able to capture sequences of intermediate frequency echo frames at full frame rate from a commercial ultrasound scanner whilst the breast is deformed using hand-induced transducer motion. Two-dimensional echo tracking was used in combination with global distortion compensation and multi-compression averaging to minimise decorrelation noise incurred when stress is applied using hand-induced transducer motion. Experiments were conducted on gelatine phantoms to evaluate the quality of elastograms produced using the prototype system relative to those produced using mechanically induced transducer motion. The strain sensitivity and contrast-to-noise ratio of freehand elastograms compared favourably with elastograms produced using mechanically induced transducer motion. However, better dynamic range and signal-to-noise ratio was achieved when elastograms were created using mechanically induced transducer motion. Despite the loss in performance incurred when stress is applied using hand-induced transducer motion, it was concluded that the prototype system performed sufficiently well to warrant clinical evaluation.
机译:已开发出原型徒手弹性成像系统,用于临床乳房成像。该系统由快速数据采集系统组成,该系统能够从商用超声扫描仪以全帧速率捕获中频回波帧序列,同时使用手感应换能器运动使乳房变形。二维回波跟踪与全局失真补偿和多次压缩平均结合使用,可最大程度地减少使用手感应换能器施加压力时产生的去相关噪声。对明胶体模进行了实验,以评估使用原型系统生成的弹性图相对于使用机械感应换能器运动生成的弹性图的质量。徒手绘制的弹性成像图的应变敏感性和对比度噪声比与使用机械感应换能器运动产生的弹性成像图相比具有优势。但是,使用机械感应的换能器运动创建弹性图时,可以获得更好的动态范围和信噪比。尽管使用手感应的换能器施加压力会导致性能下降,但是可以得出结论,原型系统的性能足以保证临床评估。

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