PENGUKURAN KETEBALAN TULANG KORTIKAL PADA CITRA PANORAMIK GIGI BERBASIS KURVA POLINOMIAL
Keywords:
tulang kortikal, panoramik gigi, multi-scale line operator, pengukuran ketebalan, kurva polinomial
Abstract
Pengukuran ketebalan tulang kortikal pada citra panoramik gigi merupakan salah satu cara yang dapat digunakan untuk mendiagnosa osteoporosis. Namun, pengukuran ketebalan tulang kortikal dari citra panoramik gigi umumnya masih dilakukan secara manual oleh ahli medis. Makalah ini mengusulkan penerapan metode kurva polinomial untuk melakukan pengukuran ketebalan tulang kortikal secara kontinyu pada citra panoramik gigi. Tahapan yang dilakukan adalah pemilihan ROI (Region Of Interest), segmentasi, dan pengukuran ketebalan tulang kortikal. Pada tahap pertama dilakukan pemilihan ROI berukuran 129×129 piksel pada bagian kiri dan kanan tulang kortikal. Segmentasi dilakukan dengan metode multi-scale line operator, hole filling, distance transform, dan dynamic programming. Pada tahap terakhir dilakukan pengukuran dengan cara memodelkan tepi atas tulang kortikal hasil segmentasi menggunakan kurva polinomial orde dua untuk menentukan arah pengukuran. Data yang digunakan dalam tahap uji coba adalah 123 citra panoramik gigi dari wanita menopause. Berdasarkan uji coba, diperoleh hasil segmentasi paling optimal yaitu dengan rata-rata nilai ME 5,9%, RAE 11,1% dan MHD 3,2. Sedangkan hasil uji coba pengukuran tulang kortikal menggunakan metode berbasis kurva polinomial diperoleh nilai sensitivity 88,2% dan specificity 56,6%.
References
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