Institutional Repository UIN Sunan Kalijaga YogyakartaDETEKSI BATU GINJAL PADA CITRA MEDIS MENGGUNAKAN EVIDENTIAL NEURAL NETWORK DAN MEKANISME CONTEXTUAL CORRECTIONS BERDASARKAN KEPUTUSAN PARSIALNIM.: 22106050036Arga Bathara DipoyonoauthorKidney stone detection using ultrasonography images is often hindered by variations in image quality and the subjectivity of interpretation. This study proposes the application of an Evidential Neural Network to classify renal ultrasonography images of patients with kidney stones and normal cases, by explicitly representing uncertainty through the Belief Functions theoretical framework. To improve the reliability of outputs produced by the Evidential Neural Network, this study models and applies a contextual correction mechanism using a partial decision approach, which works by grouping prediction outputs into specific decision areas and then applying appropriate correction parameters to each group. Model performance is evaluated using a Stratified K-Fold Cross Validation scheme with two specialized metrics, each measuring prediction error and utility-based predictive accuracy, respectively. Test results show that the model with a partial decision area-based correction mechanism achieves the best performance, with the lowest prediction error rate of 0.147 and the highest utility-based prediction accuracy of 0.91. The proposed approach significantly outperforms both the model without output correction and the model with correction applied without partial decision area grouping. These findings confirm that grouping predictions into partial decision areas is more effective in calibrating the model’s confidence level, resulting in more reliable diagnoses.004 Pemrosesan Data, Ilmu Komputer, Teknik Informatika2026-06-05UIN SUNAN KALIJAGA YOGYAKARTA;FAKULTAS SAINS DAN TEKNOLOGIThesis

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