Digital Processing for Improvement of Ultrasonic Abdominal Images
Digital Processing for Improvement of Ultrasonic Abdominal Images
复制标题
用于改进超声腹部图像的数字处理
DOI：
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发表时间：
1983
影响因子：
10.6
通讯作者：
R. Waag
中科院分区：
文献类型：
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作者：
C. N. Liu;M. Fatemi;R. Waag
通过空间反卷积和基于直方图的幅度映射来提高分辨率的数字处理已用于提高腹部超声图像质量。该处理应用于从临床成像仪器获得的脉冲回波超声数据，该仪器经过修改，允许以射频或视频形式数字记录信号，以供后续离线分析。空间反卷积是沿着超声波束的轴和宽度完成的。使用从有线目标的回波导出的点扩散函数对射频数据进行轴向反卷积。通过逆滤波器对放置在矩阵中的视频包络进行横向反卷积，该滤波器的参数可根据正在处理的图像的空间频率内容进行调整。将所得图像振幅映射为双曲线分布，以增加图像对比度，从而改善低振幅的演示。处理的结合产生了分辨率的提高，以更清晰地显示边界和对比度的变化，以展示图像中的更多细节。
Digital processing that increases resolution by spatial deconvolution and histogram-based amplitude mapping has been used to improve ultrasonic abdominal image quality. The processing was applied to pulse-echo ultrasound data obtained from clinical imaging instrumentation modified to permit digital recording of signals in either RF or video forms for subsequent off-line analysis. Spatial deconvolution was accomplished both along the axis and across the width of the ultrasonic beam. Axial deconvolution was carried out on RF data with a point spread function derived from the echo of a wire target. Lateral deconvolution was performed on the video envelope placed in a matrix by an inverse filter with parameters that adjust themselves to the spatial frequency content of the image being processed. Resultant image amplitudes were mapped into a hyperbolic distribution to increase image contrast for improved demonstration of low amplitudes. The combination of processing produced resolution improvements to show boundaries more sharply and contrast changes to demonstrate more detail in the images.