Perceptual Studies Of Contrast, Texture And Detail In Ultrasound B-Scans
Perceptual Studies Of Contrast, Texture And Detail In Ultrasound B-Scans
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超声 B 扫描中对比度、纹理和细节的感知研究
DOI：
10.1117/12.968613
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发表时间：
1988
影响因子：
--
通讯作者：
G. Cook
中科院分区：
文献类型：
--
作者：
H. Lowe;J. C. Bamber;Steve Webb;G. Cook
已经建立了用于评估视觉感知研究中观察者表现的设备，以测试皇家马斯登医院开发的超声图像增强技术的功效。进行Blackwell空间强制选择实验的变体，其使用计算机控制实验和512 × 512 × 8位数字视频显示器产生均匀背景中均匀盘的可检测性的对比度-细节曲线。描述了一种用于合成具有与B扫描散斑相同的统计特性的纹理以及用于将低对比度目标并入这样的图像中的方法。该模型被用于试点研究，以确定近似阈值的斑点调制光盘的斑点背景中的检测。结果用于定义所使用的图像显示系统的基本限制，这类似于在许多商业超声扫描仪中发现的限制。
Equipment has been set up for the assessment of observer performance in visual perception studies for testing the efficacy of ultrasound image enhancement techniques developed at the Royal Marsden Hospital. A variant of the Blackwell spatial forced choice experiment was conducted which produced contrast-detail curves of the detectability of uniform discs in a uniform background using a computer controlled experiment and a 512x512 by 8 bit digital video display. A method is described for synthesizing texture with the same statistical properties as B-scan speckle and for incorporating low contrast targets into such images. This model was used in a pilot study to determine approximate thresholds for the detection of speckle modulated discs in a speckle background. The results serve to define the basic limitations of the image display system being used, which is similar to those found in many commercial ultrasound scanners.