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The application of wavelet analysis in bone age assessment system

Author: LiShaoBin
Tutor: LiYiMin
School: Kunming University of Science and Technology
Course: Control Theory and Control Engineering
Keywords: Wavelet Analysis Wavelet basis Multi-resolution analysis Wavelet de-noising Filter Assessment of Bone Age Ossification center Epiphyseal
CLC: R319
Type: Master's thesis
Year: 2005
Downloads: 56
Quote: 1
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Abstract


Based on the analysis of the research status on the basis of the Assessment of Bone Age , combined with wavelet analysis , wavelet analysis to noise is applied to the positioning of the bone age assessment system ossification center . Wavelet analysis is developed on the basis of a signal analysis tool, it has the advantages of Fourier analysis Fourier analysis , such as in the frequency domain analysis , but it also overcome the lack of Fourier analysis , a partial analysis of the idea , both the time domain and the frequency domain signal analysis . Scale wavelet analysis of the local signal can be reduced as the frequency increases , the observed signal from a plurality of scales , which meet the characteristics of the human eye observation target , i.e. to start the whole observation target , and then analyze the target local details information . Because of this feature of wavelet analysis , wavelet analysis is widely used in the field of signal analysis . Wavelet analysis has high theoretical and practical value , the wavelet analysis has become a very significant issue . Assessment of Bone Age root dig Shougu X - ray film, the reference standard template to evaluate the degree of bone development and bone age evaluation results to determine the health status of young children chapter . Bones organisms other more reliable indicators of change to reflect the degree of development of the organism , bone age assessment is a very important technology in the medical profession . Computer bone age assessment system is bone age evaluation techniques implemented on the computer automatically by a computer analysis Shougu images automatically evaluate the degree of bone development . The wavelet noise the phalanx recognition technology in computer bone age assessment system can improve bone age assessment accuracy . The phalanx identification rely mainly on the ossification center , and thus the positioning of the ossification centers become the key to the identification of the phalanx . After extensive analysis of the characteristics of ossification center ideal projection map to locate . Projection figure fluctuates significantly , but the noise is relatively large , affecting the positioning result of the ossification center , and therefore very important to remove the projector noise . In this paper , in comparison to noise method based on wavelet analysis to noise technology . Experimental results show that wavelet analysis to noise can remove the phalanx projection noise , which greatly improved the computer bone age assessment system accuracy .

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