Gärtner T, Zacharias M, Jenderka K V, Heynemann H, Cobet U
Institut für Medizinische Physik und Biophysik, Medizinische Fakultät, Martin-Luther-Universität Halle-Wittenberg, Saale.
Radiologe. 1998 May;38(5):424-33. doi: 10.1007/s001170050376.
The result of a B-scan ultrasound examination is strongly dependent on the type of the used B-system, the chosen system parameters and the experience and critical analysis of the clinical investigator. The estimation of quantitative acoustic parameters, independent of the type of the used B-system, is one way to overcome the subjective nature and the problems of the interpretation of B-scan images. A procedure was developed to determine acoustical tissue specific parameters (ultrasound attenuation, relative backscatter coefficient) in terms of the ultrasound spectroscopy and to correct the system effects. A requirement for the calculation of acoustical parameters is the availability of primary rf echo signals without any preprocessing. Up to now measurements of phantom materials and in-vivo investigations on human testis and prostate have been carried out. The effects of pathological changes in the tissue state on the acoustical parameters are demonstrated in some examples.
B超超声检查的结果在很大程度上取决于所使用的B系统类型、所选的系统参数以及临床研究人员的经验和批判性分析。独立于所使用的B系统类型来估计定量声学参数，是克服B超图像解释的主观性和问题的一种方法。已开发出一种程序，用于根据超声光谱法确定声学组织特定参数（超声衰减、相对反向散射系数）并校正系统效应。计算声学参数的一个要求是要有未经任何预处理的原始射频回波信号。到目前为止，已经对体模材料进行了测量，并对人体睾丸和前列腺进行了体内研究。在一些实例中展示了组织状态的病理变化对声学参数的影响。
