出版社：Vilnius University, University of Latvia, Latvia University of Agriculture, Institute of Mathematics and Informatics of University of Latvia
摘要：Choroidal Melanoma (CM) is the most common primary malignancy of the eye. The overall incidence is approximately 5–7 cases per million per year. In this paper the new technique for tumours tissue structure evaluation using ultrasound spectral analysis is presented. Based on the obtained results, it can be said that radio frequency (RF) ultrasound signals parameters at the healthy tissue area and the area with the intraocular tumour – melanoma before and after treatment statistically are significantly different. This study has shown that the lower amplitude, lower spectral intercept, high spectral slope and high momentary bandwidth are typical for choroidal melanoma if compared with healthy tissues and the lower momentary bandwidth are typical for choroidal melanoma after treatment if compared with melanoma before treatment. Application of spectral analysis using non-invasive ultrasound expert system, provides the new opportunities in early diagnosis, differentiation of tumours, evaluation of the treatment effectiveness.
