A NEW METHOD FOR ULTRASONIC CHARACTERIZATION OF SKIN: USING SYSTEM IDENTIFICATION TECHNIQUES

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SHOJA ALDINI S.V.; SHARAFAT A.R.; MIRAN BEYGI M.H.

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Journal: IRANIAN JOURNAL OF MEDICAL PHYSICS Year:2005 | Volume:2 | Issue:6 Page(s): 53-68

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Title

A NEW METHOD FOR ULTRASONIC CHARACTERIZATION OF SKIN: USING SYSTEM IDENTIFICATION TECHNIQUES

Author(s)

SHOJA ALDINI S.V. | SHARAFAT A.R. | MIRAN BEYGI M.H. | Issue Writer Certificate

Keywords

ULTRASOUNDQ3

RESOLUTIONQ4

SKIN CHARACTERIZATIONQ4

SKIN LESIONSQ3

SIMULATIONQ4

SYSTEM IDENTIFICATIONQ4

Abstract

Introduction: A major problem with ULTRASOUND imaging is the difficulty in distinguishing clearly between different types of SKIN LESIONS. As a solution to the above problem, the use is made by SKIN CHARACTERIZATION in which skin parameters are extracted directly from the backscattered ULTRASOUND signals. Most of the SKIN CHARACTERIZATION methods, which have been employed so far, are based on the measurement of the changes in the magnitude of the envelope of backscattered signal. In this paper a new method for SKIN CHARACTERIZATION utilizing both the envelope and also the shape of the backscattered signal, is presented.Materials and Methods: In the proposed method, the treatment of each layer of skin is modeled as a filter whose transfer function is estimated and extracted using SYSTEM IDENTIFICATION methods such as wiener filtering, minimum variance deconvolution and higher order statistics. The proposed method has been applied to the simulated data as well as the real data, which has been obtained using an ultrasonic scanner, and appropriate experimental setup. The experiments have been carried out using phantoms, which have been prepared in such a way to provide similar geometric and acoustical properties of the skin and the lesions during the ultrasonic imaging.To evaluate the independency of the method to the depth of lesion, 60 positions at three different depths were scanned in two separate phantoms, which were proposed for each skin lesion.Results: The results of the experiments have shown lesions of the same type exhibit similar transfer functions. Classification methods can be used to distinguish between the lesions. Using morphologic features and minimum distance classifier we have been able to separate the SKIN LESIONS in each phantom with an error of approximately 5%.Discussion: Obtained results show that SYSTEM IDENTIFICATION and approaches, which used in this paper, can identify and separate lesions in different depths of skin. So the suggested method helps dermatologists to identify some SKIN LESIONS without using higher frequencies (which led to reductions in depth of imaging respectively).

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APA: Copy

SHOJA ALDINI, S.V., SHARAFAT, A.R., & MIRAN BEYGI, M.H.. (2005). A NEW METHOD FOR ULTRASONIC CHARACTERIZATION OF SKIN: USING SYSTEM IDENTIFICATION TECHNIQUES. IRANIAN JOURNAL OF MEDICAL PHYSICS, 2(6), 53-68. SID. https://sid.ir/paper/96917/en

Vancouver: Copy

SHOJA ALDINI S.V., SHARAFAT A.R., MIRAN BEYGI M.H.. A NEW METHOD FOR ULTRASONIC CHARACTERIZATION OF SKIN: USING SYSTEM IDENTIFICATION TECHNIQUES. IRANIAN JOURNAL OF MEDICAL PHYSICS[Internet]. 2005;2(6):53-68. Available from: https://sid.ir/paper/96917/en

IEEE: Copy

S.V. SHOJA ALDINI, A.R. SHARAFAT, and M.H. MIRAN BEYGI, “A NEW METHOD FOR ULTRASONIC CHARACTERIZATION OF SKIN: USING SYSTEM IDENTIFICATION TECHNIQUES,” IRANIAN JOURNAL OF MEDICAL PHYSICS, vol. 2, no. 6, pp. 53–68, 2005, [Online]. Available: https://sid.ir/paper/96917/en

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