Objective assessment of sonographic: quality II acquisition information spectrum.
Objective assessment of sonographic: quality II acquisition information spectrum.
复制标题
超声检查的客观评估：质量II采集信息谱。
DOI：
10.1109/tmi.2012.2231963
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发表时间：
2013
影响因子：
10.6
通讯作者：
Insana,MichaelF
中科院分区：
文献类型：
--
作者：
Nguyen,NghiaQ;Abbey,CraigK;Insana,MichaelF
本文描述了一种基于任务的信息论方法来评估诊断超声检查中的图像质量。我们将 Kullback-Leibler 散度度量（将记录的射频回波信号中包含的诊断信息量化）扩展为由两个频谱分量组成的空间频率积分：一个描述低对比度诊断任务的患者特征，另一个描述仪器属性。后一个量是采集信息谱（AIS），它测量成像系统能够在每个空间频率传输到回波数据的物体信息的密度。 AIS 是基于组织中产生物体对比度的声学散射的独特特性而得出的。通过使用来自模拟病变的回声信号数据的蒙特卡罗研究验证了积分表达做出的预测。我们的分析根据构成图像质量的仪器的工程特性来预测任何超声检查系统在特定诊断任务中的诊断性能。
This paper describes a task-based, information-theoretic approach to the assessment of image quality in diagnostic sonography. We expand the Kullback-Leibler divergence metricJ, which quantifies the diagnostic information contained within recorded radio-frequency echo signals, into a spatial-frequency integral comprised of two spectral components: one describes patient features for low-contrast diagnostic tasks and the other describes instrumentation properties. The latter quantity is the acquisition information spectrum (AIS), which measures the density of object information that an imaging system is able to transfer to the echo data at each spatial frequency. AIS is derived based on unique properties of acoustic scattering in tissues that generate object contrast. Predictions made by theJintegral expression were validated through Monte Carlo studies using echo-signal data from simulated lesions. Our analysis predicts the diagnostic performance of any sonographic system at specific diagnostic tasks based on engineering properties of the instrument that constitute image quality.