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Detection Microcalcifications in Mammograms Using Wavelet

Detection Microcalcifications in Mammograms Using Wavelet. Reporter : 陳宏維 Date : 2007/05/22. Outline. Introduction Fourier TF. V.S. Wavelet TF. Two-Dimension Wavelet Transform Performance Classifier. Introduction. 乳房內部成份 : 脂肪、腺體、結締組織 鈣化形成 : 乳汁沉澱或細胞壞死

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Detection Microcalcifications in Mammograms Using Wavelet

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  1. Detection Microcalcifications in Mammograms Using Wavelet Reporter : 陳宏維 Date : 2007/05/22

  2. Outline • Introduction • Fourier TF. V.S. Wavelet TF. • Two-Dimension Wavelet Transform • Performance • Classifier

  3. Introduction 乳房內部成份 : 脂肪、腺體、結締組織 鈣化形成 : 乳汁沉澱或細胞壞死 亮度 : 脂肪 ＜ 腺體及結締組織 ≦微鈣化組織 (a) Fatty (b) Fatty-glandular (c) Dense-glandular

  4. One-Dimensional Statistics (a) One-Dimensional Curve (b) ROI (c) Gaussian Object

  5. Discontinuity Fourier TF. V.S. Wavelet TF. (c) Fourier Coefficient Original Signal: (a) Original Signal (b) Wavelet Coefficient

  6. Two-Dimension Wavelet Transform 2 2 2 2 2 2 2 2 (a) Analysis 2 2 2 2 2 (b) Synthesis

  7. Wavelet Octave (b) Original Image (a) Wavelet Octaves (c) Original Image

  8. Performance • True Positive (TP) : 系統將病變組織判斷為病變組織。 • True Negative (TN) : 系統將病變組織誤判為正常組織。 • False Positive (FP) : 系統將正常組織誤判為病變組織。 • False Negative (FN) : 系統將正常組織判斷為正常組織。

  9. Wavelet Function (a) Original Image (d) BAUD 4 (b) BAUD 4 Filter (e) BAUD 20 (c) BAUD 20 Filter

  10. α(x) β(x) xmax x (Gray Level Value) xmin t Classifier α(x) : pdf for the breast tissue β(x) : pdf for the microcalcifications Renyi’s entropy :

  11. Detection (a) Original Image (b) Truth Image (c) Detected Microcalcification

  12. Reference • K. Thangavel, M. Karnan, R. Sivakumar, and A. Kaja Mohideen, “Automatic Detection of Microcalcification in Mammograms- A Review,” ICGST, 2006. • Giuseppe Boccignone, Angelo Chianese, and Antonio Picariello, “Computer aided detection of microcalcification in digital mammograms,” Computer in Biology and Medicine, 2000. • Robin N. Strickland, Senior Member, IEEE, and Hee Π Hahn, “Wavelet Transforms for Detecting Microcalcification in Mammograms,” IEEE Trans. Med. Image, Vol. 15, No. 2, Appil, 1996 • Ted C. Wang, and Nicolaos B. Karayianmis, “Detection of Microcalcification in Digital Mammograms Using Wavelets,” IEEE Trans. Med. Image, Vol. 17, No. 4, August, 1998 • 繆紹剛, ”數位影像處理 活用--Matlab”, 全華科技圖書股份有限公司, 2002

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