Sommer G, Stern R, Chen H S
Department of Diagnostic Radiology, Stanford University, Calif.
Radiology. 1987 Nov;165(2):425-30. doi: 10.1148/radiology.165.2.3310096.
A new type of ultrasound (US) image was created by first recording unfiltered, backscattered ultrasonic amplitudes to a standard dynamic range prior to narrow band digital filtration of the ultrasonic signal and mapping of the resultant filtered ultrasonic envelope amplitudes. Unlike unfiltered images, those created by narrow band digital filtration permit differentiation between phantoms with different scattering characteristics and normal from cirrhotic human liver in vivo. Significantly different image statistics for normal and cirrhotic liver (P less than .002) were demonstrated in preliminary clinical trials.
一种新型超声（US）图像的创建过程如下：首先在对超声信号进行窄带数字滤波并映射所得滤波后的超声包络幅度之前，将未滤波的反向散射超声幅度记录到标准动态范围内。与未滤波图像不同，通过窄带数字滤波创建的图像能够区分具有不同散射特性的体模以及体内正常肝脏与肝硬化肝脏。在初步临床试验中显示，正常肝脏和肝硬化肝脏的图像统计数据存在显著差异（P小于0.002）。
