Deep learning system for distinguishing between nasopalatine duct cysts and radicular cysts arising in the midline region of the anterior maxilla on panoramic radiographs

Kise Yoshitaka,Kuwada Chiaki,Mori Mizuho,Fukuda Motoki,Ariji Yoshiko,Ariji Eiichiro 대한영상치의학회 2024 Imaging Science in Dentistry Vol.54 No.1

Purpose: The aims of this study were to create a deep learning model to distinguish between nasopalatine duct cysts (NDCs), radicular cysts, and no-lesions (normal) in the midline region of the anterior maxilla on panoramic radiographs and to compare its performance with that of dental residents. Materials and Methods: One hundred patients with a confirmed diagnosis of NDC (53 men, 47 women; average age, 44.6±16.5 years), 100 with radicular cysts (49 men, 51 women; average age, 47.5±16.4 years), and 100 with normal groups (56 men, 44 women; average age, 34.4±14.6 years) were enrolled in this study. Cases were randomly assigned to the training datasets (80%) and the test dataset (20%). Then, 20% of the training data were randomly assigned as validation data. A learning model was created using a customized DetectNet built in Digits version 5.0 (NVIDIA, Santa Clara, USA). The performance of the deep learning system was assessed and compared with that of two dental residents. Results: The performance of the deep learning system was superior to that of the dental residents except for the recall of radicular cysts. The areas under the curve (AUCs) for NDCs and radicular cysts in the deep learning system were significantly higher than those of the dental residents. The results for the dental residents revealed a significant difference in AUC between NDCs and normal groups. Conclusion: This study showed superior performance in detecting NDCs and radicular cysts and in distinguishing between these lesions and normal groups.

Bin-Picking Method using Stereo Vision

Kisee Joo,Min-Hong Han 대한산업공학회 1994 대한산업공학회 춘계학술대회논문집 Vol.1994 No.4

Effect of deep transfer learning with a different kind of lesion on classification performance of pre-trained model: Verification with radiolucent lesions on panoramic radiographs

Kise Yoshitaka,Ariji Yoshiko,Kuwada Chiaki,Fukuda Motoki,Ariji Eiichiro 대한영상치의학회 2023 Imaging Science in Dentistry Vol.53 No.1

Purpose: The aim of this study was to clarify the influence of training with a different kind of lesion on the perfor- mance of a target model. Materials and Methods: A total of 310 patients (211 men, 99 women; average age, 47.9±16.1 years) were selected and their panoramic images were used in this study. We created a source model using panoramic radiographs including mandibular radiolucent cyst-like lesions (radicular cyst, dentigerous cyst, odontogenic keratocyst, and ameloblastoma). The model was simulatively transferred and trained on images of Stafne’s bone cavity. A learning model was created using a customized DetectNet built in the Digits version 5.0 (NVIDIA, Santa Clara, CA). Two machines (Machines A and B) with identical specifications were used to simulate transfer learning. A source model was created from the data consisting of ameloblastoma, odontogenic keratocyst, dentigerous cyst, and radicular cyst in Machine A. Thereafter, it was transferred to Machine B and trained on additional data of Stafne’s bone cavity to create target models. To investigate the effect of the number of cases, we created several target models with different numbers of Stafne’s bone cavity cases. Results: When the Stafne’s bone cavity data were added to the training, both the detection and classification performances for this pathology improved. Even for lesions other than Stafne’s bone cavity, the detection sensitivities tended to increase with the increase in the number of Stafne’s bone cavities. Conclusion: This study showed that using different lesions for transfer learning improves the performance of the model.

Effects of 1 year of training on the performance of ultrasonographic image interpretation: A preliminary evaluation using images of Sjogren syndrome patients

Kise, Yoshitaka,Moystad, Anne,Bjornland, Tore,Shimizu, Mayumi,Ariji, Yoshiko,Kuwada, Chiaki,Nishiyama, Masako,Funakoshi, Takuma,Yoshiura, Kazunori,Ariji, Eiichiro Korean Academy of Oral and Maxillofacial Radiology 2021 Imaging Science in Dentistry Vol.51 No.2

Purpose: This study investigated the effects of 1 year of training on imaging diagnosis, using static ultrasonography (US) salivary gland images of Sjögren syndrome patients. Materials and Methods: This study involved 3 inexperienced radiologists with different levels of experience, who received training 1 or 2 days a week under the supervision of experienced radiologists. The training program included collecting patient histories and performing physical and imaging examinations for various maxillofacial diseases. The 3 radiologists (observers A, B, and C) evaluated 400 static US images of salivary glands twice at a 1-year interval. To compare their performance, 2 experienced radiologists evaluated the same images. Diagnostic performance was compared between the 2 evaluations using the area under the receiver operating characteristic curve (AUC). Results: Observer A, who was participating in the training program for the second year, exhibited no significant difference in AUC between the first and second evaluations, with results consistently comparable to those of experienced radiologists. After 1 year of training, observer B showed significantly higher AUCs than before training. The diagnostic performance of observer B reached the level of experienced radiologists for parotid gland assessment, but differed for submandibular gland assessment. For observer C, who did not complete the training, there was no significant difference in the AUC between the first and second evaluations, both of which showed significant differences from those of the experienced radiologists. Conclusion: These preliminary results suggest that the training program effectively helped inexperienced radiologists reach the level of experienced radiologists for US examinations.

Bin Picking Method using Stereo Vision

Kisee Joo,Min-Hong Han 제어로봇시스템학회 1994 제어로봇시스템학회 국내학술대회 논문집 Vol.1994 No.10

연구원 활동 : 발표논문요약 ; < 산업공학분야 >

(Kisee Joo),(Min Hong Han) 고려대학교 공학기술연구소 1996 생산기술연구소보 Vol.3 No.-

연구원 활동 : 발표논문요약 < 산업공학분야 >

(Kisee Joo),(Min Hong Han) 고려대학교 공학기술연구소 1994 공학기술연구소보 Vol.1 No.-

지방 공기업의 효율성과 경영성과에 관한 연구 - 도시개발공사를 중심으로 -

이기세 ( Kise Lee ),고아영 ( Ahyoung Goh ),정규표 ( Kyupyo Jung ),전성일 ( Seongil Jeon ) 전남대학교 지역개발연구소 2021 지역개발연구 Vol.53 No.1

정부는 지방공기업의 방만한 경영을 방지하고 효율적인 운영을 위해 매년 경영성과를 평가하여 이를 인센티브 수단으로 활용하고 있다. 그러나 이러한 경영평가의 일부 지표가 평가위원의 주관적 판단이 개입될 수 있어 평가결과에 대한 신뢰성이 하락될 수 있다. 이에 본 연구에서는 지방공기업 중 도시개발공사 유형에 속한 기업들의 경영평가점수와 DEA에 의한 경영효율성측정치와의 관련성을 살펴보고, 이를 통해 현재 실시되고 있는 경영평가제도의 신뢰성을 검증하고자 한다. 연구결과 경영평가점수와 DEA에 의한 경영효율성과는 유의한 양(+)의 관련성을 보였다. 또한 경영평가 항목을 세부적으로 나누었을 때도 경영효율성은 리더십, 경영시스템, 경영성과, 정책준수와는 유의한 양(+)의 관련성을 보였지만, 고객만족도와는 유의한 관련성을 보이지 않았다. 이러한 연구결과를 통해 공기업의 경영평가가 평가자의 주관성으로 개입될 수 있음에도 불구하고 경영효율성이 고려되어 평가되고 있음을 확인할 수 있었으며 이를 통해 공기업 경영평가에 대한 신뢰도를 제고시킬 수 있는 실증적 증거를 제공하였다. 또한 이러한 결과는 공기업경영평가지표에 대해 개선방향과 효율적인 지표를 개발하는데 있어 유용한 정보를 제공해 줄 것으로 기대된다. The government annually reports business performance of local public institutions in order to operate them effectively. In process of assessment, it is possible to be subjective judgment. Because of that, the reliability of the results can go down. This study local public institutions as our subjects and Using DEA analysis, we analyzed the management effectiveness. We analyzed relationship between this measurement and the managements effectiveness of local public institutions. Through the relationship, our aim was to verify the reliability management assessment system about local public institutions. The results were below. First, performance-score of local public institutions and management effectiveness showed positive relationship. Second, We categorize performance scores such as leadership, management system, performance and policy compliance. Those have also positive relationship with managements effectiveness, but customer satisfaction measurement was not. According to this results, we judged that the present management assessment for local public institutions was reflected in effectiveness of management. also this results was empirical evidences to enhance reliability of performance-score.

The Rope Weight Measurement System Development

JOO, KISEE 목포해양대학교해사산업기술연구소 1997 심포지움강연논집 Vol.1997 No.11

Recently, the computer vision in field of product inspection is very popular to achieve the factory automation since the labor cost is dramatically increasing. In this paper, the diameter of a rope is measured by CCD camera which is orthogonally mounted on the ceiling. Two parameters which are the diameter and the length of rope are used to measure the weight of a rope. If the rope's weight is reached to predetermined weight, the information is transmitted to PLC(programmable logic control) to cut the rope on the wheel. The cutting machine cuts the rope according to the information obtained from the CCD camera. To measure the weight on real time, the searching space is restricted the predetermined area according to the camera calibration position. This method contributes to reduce the production cost since the operators are necessary to measure the weight of a rope by try-and-error method.

대학생의 불확실성에 대한 인내력 부족과 진로 결정 관련 모호함에 대한 인내력의 관계

이기세(Kise Lee),연규진(Kyu Jin Yon) 한국진로교육학회 2019 진로교육연구 Vol.32 No.1

본 연구는 대학생들의 불확실성에 대한 인내력 부족과 진로 결정 관련 모호함에 대한 인내력의 관계에서 멘토링 기능에 의해 조절된 걱정의 매개 효과를 알아보고자 하였다. 대학생 382명을 대상으로 자기보고식 설문을 실시하였으며, 수집된 자료를 바탕으로 조절된 매개 효과 분석을 실시하였다. 분석 결과, 첫째, 불확실성에 대한 인내력 부족과 진로 결정 관련 모호함에 대한 인내력의 관계에서 걱정은 간접 매개 효과를 보였다. 둘째, 불확실성에 대한 인내력 부족과 진로 결정 관련 모호함에 대한 인내력의 관계에서 멘토링 기능에 의해 조절된 걱정의 매개 효과가 확인되었다. 종합하면, 한국 대학생들은 불확실성에 대한 인내력이 부족할수록 걱정을 많이 하게 됨으로써 진로 결정과 관련된 모호함을 견디기 어려워하게 되는데, 이러한 부정적 영향은 멘토링 기능 수준이 높을수록 줄어든다는 것을 의미한다. 연구 결과를 토대로 진로 상담 장면에서의 적용 가능성과 본 연구의 제한점 및 후속 연구에 대한 제언을 논의하였다. This study was to examine the moderated mediation effect of worry and mentoring function on the relation between intolerance of uncertainty and career decision ambiguity tolerance. A sample of 382 college students completed self-report questionnaires. SPSS 22 and PROCESS for SPSS 2.16.3 were used to test a mediation effect, a moderation effect, and a moderated mediation effect. The main findings of this study are summarized as follows. Worry had a significant mediation effect on the relation between intolerance of uncertainty and career decision ambiguity tolerance. Also, a mentoring function moderated the mediation effect of worry on the relation between intolerance of uncertainty and career decision ambiguity tolerance. In conclusion, the present study indicated that Korean college students have a difficulty in enduring career decision ambiguity when they worry more due to their higher intolerance of uncertainty, and this negative effect decreased when the mentoring function is high. Based on findings, the implication of the current finding in counseling practice, limitations of the study, and suggestions for future research were discussed.