https://scholar.dgist.ac.kr/handle/20.500.11750/1922 2026-06-03T22:09:49Z https://scholar.dgist.ac.kr/handle/20.500.11750/60329 Title: 의료 이미지 분류 방법 및 장치 Author(s): 박상현; Philip Chikontwe Abstract: 의료 이미지 분류 방법 및 장치가 개시된다. 본 개시의 일 실시 예에 따른 의료 이미지 분류 방법은, 분류의 대상이 되는 의료 이미지를 획득하는 단계와, 획득한 의료 이미지의 전체 슬라이드 이미지 세트의 모든 슬라이드를 기 학습된 분류 모델에 입력하여, 의료 이미지의 모든 슬라이드의 인스턴스 특징(feature)을 추출하는 단계와, 기 학습된 다중 인스턴스 학습 모델을 기반으로, 의료 이미지의 모든 슬라이드의 인스턴스 특징의 최대 중요 인스턴스 임베딩을 수행하여 데이터 분포를 재보정하는 단계와, 재보정한 결과에 기초하여 해당 의료 이미지의 레이블을 출력하는 단계를 포함할 수 있다. https://scholar.dgist.ac.kr/handle/20.500.11750/60053 Title: Glio-LLaMA-Vision: A Robust Vision-Language Model for Molecular Status Prediction and Radiology Report Generation in Adult-type Diffuse Gliomas Author(s): Park, Yae Won; Kang, Myeongkyun; Chang, Jong Hee; Park, Sang Hyun; Ahn, Sung Soo Abstract: BACKGROUND: To establish a robust vision-language model (“Glio-LLaMA-Vision”) for molecular status prediction and radiology report generation (RRG) in adult-type diffuse gliomas. METHODS: Multiparametric MRI data (T1, T2, FLAIR, and postcontrast T1-weighted images) and paired radiology reports (in English) from 1,001 patients with adult-type diffuse gliomas (144 oligodendrogliomas, 157 IDH-mutant astrocytomas, and 700 IDH-wildtype glioblastomas) diagnosed according to the 2021 WHO classification were included in the institutional training set. A vision-language model, Glio-LLaMA-Vision, was developed from LLaMA 3.1 pre-trained on 2.79 million biomedical image-text pairs from PubMed Central and further optimized via fine-tuning from the institutional training set. The performance was validated in 100 patients and 80 patients with paired MRI-radiology reports from an institutional validation set and another tertiary institution, and in 170 and 477 patients with MRI from TCGA and UCSF, respectively. RESULTS: In terms of IDH mutation status prediction, Glio-LLaMA-Vision showed an overall performance of area under the curve, accuracy, sensitivity, and specificity of 0.89 (95% confidence interval 0.81-0.95), 86.0%, 84.0%, and 88.0%, respectively. In terms of radiology report generation, the BLEU-1, ROUGE-L, and METEOR scores were 0.49, 0.42, and 0.24, respectively, while the majority (91.3%) of generated reports were considered clinically acceptable. CONCLUSION: Glio-LLaMA-Vision shows promising performance in molecular status prediction, and RRG in adult-type diffuse gliomas, and shows potential of clinical assistance. 2025-11-18T15:00:00Z https://scholar.dgist.ac.kr/handle/20.500.11750/59905 Title: Logical Anomaly Detection with Text-based Logic via Component-Aware Contrastive Language-Image Training Author(s): Lee, Seung-eon; Kim, Soopil; An, Sion; Lee, Sang-Chul; Park, Sang Hyun Abstract: AI-based automatic visual inspection systems have been extensively researched to streamline various industrial products' labor-intensive anomaly detection processes. Despite significant advancements, detecting logical anomalies remains challenging due to the multitude of rules governing the assembly of multiple components to create a normal product. Existing methods have relied solely on image information for anomaly detection, resulting in limited accuracy as they fail to account for these diverse complex rules. Instead, humans detect anomalies by comparing the image with pre-defined logic which can be clearly expressed with natural language. Inspired by the human decision process, we propose a logical anomaly detection model that leverages text-based logic like human reasoning. With user-defined rules (i.e., positive rules) and logically distinct negative rules, we train the model using component-aware contrastive learning that increases the similarity between images and positive rules while decreasing the similarity with negative rules. However, accurately comparing textual and visual features is challenging due to multiple components, each governed by different rules, within a single image. To address this, we developed a zero-shot related region detection technique, which guides the model's focus on components relevant to each rule. We evaluated the proposed model on three public datasets and achieved state-of-the-art results in a few-shot logical anomaly detection task. Our findings highlight the potential of integrating vision-language models to enhance logical anomaly detection and utilizing text-based logic in complex industrial settings. 2025-08-06T15:00:00Z https://scholar.dgist.ac.kr/handle/20.500.11750/59878 Title: ARTIFICIAL INTELLIGENCE DEVICE AND OPERATION METHOD THEREOF Author(s): 정지욱; 김수필; 전혜정; 치콘테 필립; 박상현; 김재홍; 안시온 Abstract: An artificial intelligence device according to an embodiment of the present disclosure may comprise a memory and a processor for: training a binary classifier which infers whether a patch is a positive patch or a negative patch by using positive patches indicating normality and negative patches indicating abnormality on the basis of a normal sample indicating a non-defective product and an unlabeled sample; when the reliability of a patch output in response to a patch of a new unlabeled sample input to the trained binary classifier is greater than or equal to threshold reliability, determining the input patch as a positive patch; and storing the determined positive patch in the memory.