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"Kanker liver pada citra hasil CT-Scan memiliki bentuk, lokasi serta tekstur yang berbeda – beda disetiap citra. Perbedaan contrast antara abnormalitas dan liver sehat sering kali tidak dapat terlihat jelas, sehingga menyulitkan dalam evaluasi. Abnormalitas liver antara lain pembengkakan, fibrosis, kehadiran tumor jinak atau tumor ganas. Perbedaan contrast rendah dengan ukuran lebar dalam citra mudah dikenali sebagai abnormalitas, namun untuk massa kecil dan contrast rendah sulit dievaluasi. Dalam penelitian ini telah dilakukan CAD dengan tujuan untuk membantu evaluasi abnormalitas liver utamanya abnormalitas dengan ukuran kecil. Metode penelitian yang digunakan dalam penelitian ini adalah metode segmentasi berdasarkan active contour. Data yang digunakan merupakan data sekunder citra abdomen yang dihasilkan dari modalitas Computed Tomography Scanner (CT-Scan) RSUD Cibinong Bogor. Teknik pengumpulan data yang digunakan dengan melakukan observasi pada data pasien citra liver abnormal dari pasien-pasien kanker liver dan citra liver normal dari pasien-pasien penyakit lainnya sesuai dengan diagnosis dokter. Sedangkan untuk olah data digunakan proses ekstraksi fitur menggunakan analisis tekstur Gray-Level Co-occurrence Matrix (GLCM) dengan machine learning berupa Artificial Neural Network (ANN) untuk deteksi abnormalitas citra. Hasil penelitian menyatakan bahwa ANN dapat digunakan untuk mengelompokkan citra kedalam grup normal dan abnormal dengan akurasi sebesar 89% sensitivitas 86%, spesifisitas 92%, presisi 91%, error keseluruhan 10%.

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Liver abnormalities in CT image commonly have different shape, location and texture. The contrast between abnormalities and healthy liver often cannot be clearly seen, making it difficult to evaluate. Liver abnormalities include swelling, fibrosis, the presence of benign tumors or malignant tumors. Low contrast differences with width measurements in images are easily recognized as abnormalities, but for small masses and low contrast it is difficult to evaluate. In this study CAD was carried out with the aim to help evaluate liver abnormalities, especially small size abnormalities. The segmentation method based on active contour is the method was employed in this research. The data which used was secondary data resulting abdomen image  from modalities of Computed Tomography Scanner (CT-Scan) of Cibinong Hospital, Bogor. The data collection techniques was used in this research were data abnormal liver image from patients liver cancer and normal liver image from patients other diseases according to the doctor's diagnosis. Meanwhile, the technique used to processing data was extraction feature process with analysis Gray-Level Co-occurrence Matrix (GLCM) texture and machine learning of Artificial Neural Network (ANN) for detection abnormality image. Results of this research stated that ANN can used for classify image to normal and abnormal group with accuracy of 89%, sensitivity of 86%, specificity of 92%, precision of 91%, and error of 10%."

"[ABSTRAKRontgen dada atau Chest X-Ray (CXR) merupakan salah satu aplikasi pencitraan medis yang paling sering digunakan dalam pendeteksian kelainan khususnya tumor pada paru – paru. Untuk menentukan diagnosis kelainan tersebut, seorang dokter masih mengandalkan pengamatan visual dalam pembacaan hasil citra CXR sehingga penilaian bersifat subyektif tergantung pada masing – masing dokter. Oleh karena itu, pada penelitian ini dilakukan perancangan sistem pengolahan citra sebagai alat bantu identifikasi kelainan paru – paru. Kategori citra CXR yang digunakan adalah citra pada keadaan normal, tumor, dan kelainan bukan tumor. Tahapan pengolahan yang dilakukan berupa pre-processing menggunakan median filtering dan ekualisasi histogram serta proses segmentasi menggunakan otsu’s thresholding dan active contour : snake. Uji hasil pengolahan citra dengan hasil diagnosis dokter menggunakan jaringan syaraf tiruan backpropagation menghasilkan akurasi sebesar 92,85 %.

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ABSTRACTChest X-Ray (CXR) is a medical imaging applications that most commonly used for detects of abnormalities, especially tumors of the lung. To determine the abnormality diagnosis, doctors still rely on visual observations to read a CXR image, so that the assessments are subjective depending on each doctor. This study purposes to design an image processing system as a tool for identification of lung’s abnormalities. It used three classification of CXR image, which are lungs image in normal circumstances, tumors, and abnormalities besides tumor. Stages of image processing are done in the form of pre-processing using a median filtering and histogram equalization and also the process of segmentation using Otsu's thresholding and active contour: snake. Test the image processing results with the results of the doctor's diagnosis using artificial neural network backpropagation produces an accuracy of 92,85 %., Chest X-Ray (CXR) is a medical imaging applications that most commonly used for detects of abnormalities, especially tumors of the lung. To determine the abnormality diagnosis, doctors still rely on visual observations to read a CXR image, so that the assessments are subjective depending on each doctor. This study purposes to design an image processing system as a tool for identification of lung’s abnormalities. It used three classification of CXR image, which are lungs image in normal circumstances, tumors, and abnormalities besides tumor. Stages of image processing are done in the form of pre-processing using a median filtering and histogram equalization and also the process of segmentation using Otsu's thresholding and active contour: snake. Test the image processing results with the results of the doctor's diagnosis using artificial neural network backpropagation produces an accuracy of 92,85 %.]"