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Lee, Kyu Min,Jang, Sun Mi,Oh, Seo Young,Kim, Do Young,Lee, Geewon,Kim, Ahrong,Kim, Min Ji,Kim, Tae Hwa,Park, Joon Woo,Lee, Kwangha,Kim, Ki Uk,Lee, Min Ki,Eom, Jung Seop The Korean Academy of Tuberculosis and Respiratory 2015 Tuberculosis and Respiratory Diseases Vol.78 No.4
We presented a case of unusual endobronchial inflammatory polyps as a complication following endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) in a patient with tuberculous lymphadenitis. EBUSTBNA of the right hilar lymph node was performed in a 29-year-old, previously healthy man. The patient was confirmed with tuberculous lymphadenitis and received antituberculosis medication over the course of 6 months. Chest computed tomography, after 6 months of antituberculosis therapy following the EBUS-TBNA showed nodular bronchial wall thickening of the right main bronchus. Histological and microbiological examinations revealed inflammatory polyps. After 7 months, the inflammatory polyps regressed almost completely without need for removal.
( Kyu Min Lee ),( Sun Mi Jang ),( Seo Young Oh ),( Do Young Kim ),( Geewon Lee ),( Ahrong Kim ),( Min Ji Kim ),( Tae Hwa Kim ),( Joon Woo Park ),( Kwangha Lee ),( Ki Uk Kim ),( Min Ki Lee ),( Jung Seo 대한결핵 및 호흡기학회 2015 Tuberculosis and Respiratory Diseases Vol.78 No.4
We presented a case of unusual endobronchial inflammatory polyps as a complication following endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) in a patient with tuberculous lymphadenitis. EBUSTBNA of the right hilar lymph node was performed in a 29-year-old, previously healthy man. The patient was confirmed with tuberculous lymphadenitis and received antituberculosis medication over the course of 6 months. Chest computed tomography, after 6 months of antituberculosis therapy following the EBUS-TBNA showed nodular bronchial wall thickening of the right main bronchus. Histological and microbiological examinations revealed inflammatory polyps. After 7 months, the inflammatory polyps regressed almost completely without need for removal.
Lee, Geewon,I, Hoseok,Kim, Seong-Jang,Jeong, Yeon Joo,Kim, In Joo,Pak, Kyoungjune,Park, Do Yun,Kim, Gwang Ha Society of Nuclear Medicine 2014 The Journal of nuclear medicine Vol.55 No.8
<P>This was a study to compare the diagnostic efficacies of endoscopic ultrasonography (EUS), CT, PET/MR imaging, and PET/CT for the preoperative local and regional staging of esophageal cancer, with postoperative pathologic stage used as the reference standard. <B>Methods:</B> During 1 y, 19 patients with resectable esophageal cancer were enrolled and underwent preoperative EUS, CT, PET/CT, and PET/MR imaging. A chest radiologist and nuclear medicine physician retrospectively reviewed the images and assigned tumor and lymph node stages according to the seventh version of the TNM system and the American Joint Committee on Cancer staging system. Four patients who were treated nonsurgically were excluded from data analysis. The efficacies of EUS, CT, PET/CT, and PET/MR imaging were compared. <B>Results:</B> Primary tumors were correctly staged in 13 (86.7%), 10 (66.7%), and 5 (33.3%) patients at EUS, PET/MR imaging, and CT, respectively (<I>P</I> value ranging from 0.021 to 0.375). The accuracy of determining T1 lesions was 86.7%, 80.0%, and 46.7% for EUS, PET/MR imaging, and CT, respectively. For distinguishing T3 lesions, the accuracy was 93.3% for EUS and 86.7% for both PET/MR imaging and CT. For lymph node staging, the accuracy was 83.3%, 75.0%, 66.7%, and 50.0% for PET/MR imaging, EUS, PET/CT, and CT, respectively. In addition, area-under-the-curve values were 0.800, 0.700, 0.629, and 0.543 for PET/MR imaging, EUS, PET/CT, and CT, respectively. <B>Conclusion:</B> PET/MR imaging demonstrated acceptable accuracy for T staging compared with EUS and, although not statistically significant, even higher accuracy than EUS and PET/CT for prediction of N staging. With adjustments in protocols, PET/MR imaging may provide an important role in preoperative esophageal cancer staging in the future.</P>
센서퓨전 기반의 Auto High Beam 시스템 구현
김지원(Geewon Kim),강현우(Hyunwoo Kang),신주석(Juseok Shin) 한국자동차공학회 2022 한국자동차공학회 부문종합 학술대회 Vol.2022 No.6
An AHB system was implemented using a camera and radar sensor in an embedded system. In this paper, vehicles, motorcycles, and street-lights were detected through a deep learning model, and in particular, it recognized whether the surroundings were bright by street-lights. In the case of deep learning models, the model is designed to be lightweight so that it can be operated in an embedded system. It also used radar sensors to detect objects that exist at a distance of 100m or more, which cannot be detected by deep learning models. The performance of the implemented AHB system was verified through various test scenarios, and it was confirmed that the high beam was normally controlled in 38 out of 40 test scenarios.
( Joong Keun Kim ),( Ki Uk Kim ),( Sun Mi Jang ),( Kyung Hwa Shin ),( Jung Seop Eom ),( Hae Jung Na ),( Geewon Lee ),( Ahrong Kim ),( Byeong Gu Song ),( Dong Hun Shin ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
A 62-year-old female patient with a 10-month history of palliative chemotherapy for adenocarcinoma of the lung was diagnosed with a focal liver lesion on a follow-up CT scan. It was presumed initially to be due to metastasis. However, PET/CT scan showed no abnormal uptake, and thus histopathological confirmation was required. An ultrasound- guided biopsy was performed, and pathology revealed that the lesion was a benign tuberculosis pseudotumor. Primary hepatic tuberculosis, especially the macronodular form, remains very rare, even in a country where tuberculosis is prevalent. Hepatic tuberculosis should be included in the differential diagnosis of patients with underlying malignancies such as lung cancer, to avoid missing this rare but curable disease.
Jang, Sun Mi,Kim, Min Ji,Cho, Jeong Su,Lee, Geewon,Kim, Ahrong,Kim, Jeong Mi,Park, Chul Hong,Park, Jong Man,Song, Byeong Gu,Eom, Jung Seop The Korean Academy of Tuberculosis and Respiratory 2014 Tuberculosis and Respiratory Diseases Vol.77 No.4
We present a case of an unusual infectious complication of a ruptured mediastinal abscess after endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA), which led to malignant pleural effusion in a patient with stage IIIA non-small-cell lung cancer. EBUS-TBNA was performed in a 48-year-old previously healthy male, and a mediastinal abscess developed at 4 days post-procedure. Video-assisted thoracoscopic surgery was performed for debridement and drainage, and the intraoperative findings revealed a large volume pleural effusion that was not detected on the initial radiographic evaluation. Malignant cells were unexpectedly detected in the aspirated pleural fluid, which was possibly due to increased pleural permeability and transport of malignant cells originating in a ruptured subcarinal lymph node from the mediastinum to the pleural space. Hence, the patient was confirmed to have squamous cell lung carcinoma with malignant pleural effusion and his TNM staging was changed from stage IIIA to IV.
( Sun Mi Jang ),( Min Ji Kim ),( Jeong Su Cho ),( Geewon Lee ),( Ahrong Kim ),( Jeong Mi Kim ),( Chul Hong Park ),( Jong Man Park ),( Byeong Gu Song ),( Jung Seop Eom ) 대한결핵 및 호흡기학회 2014 Tuberculosis and Respiratory Diseases Vol.77 No.4
We present a case of an unusual infectious complication of a ruptured mediastinal abscess after endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA), which led to malignant pleural effusion in a patientwith stage IIIA non-small-cell lung cancer. EBUS-TBNA was performed in a 48-year-old previously healthy male, and a mediastinal abscess developed at 4 days post-procedure. Video-assisted thoracoscopic surgery was performed for debridement and drainage, and the intraoperative findings revealed a large volume pleural effusion that was not detected on the initial radiographic evaluation. Malignant cells were unexpectedly detected in the aspirated pleural fluid, which was possibly due to increased pleural permeability and transport of malignant cells originating in a ruptured subcarinal lymph node from the mediastinum to the pleural space. Hence, the patient was confirmed to have squamous cell lung carcinoma with malignant pleural effusion and his TNM staging was changed from stage IIIA to IV.
Sparse Spanning <tex> $k$</tex>-Connected Subgraphs in Tournaments
Kang, Dong Yeap,Kim, Jaehoon,Kim, Younjin,Suh, Geewon Society for Industrial and Applied Mathematics 2017 SIAM journal on discrete mathematics Vol.31 No.3
<P>In 2009, Bang-Jensen asked whether there exists a function g(kappa) such that every strongly kappa-connected n-vertex tournament contains a strongly kappa-connected spanning subgraph with at most kappa n broken vertical bar g(k) arcs. In this paper, we answer the question by showing that every strongly kappa-connected n-vertex tournament contains a strongly kappa-connected spanning subgraph with at most kappa n+750k(2) log(2)(kappa+1) arcs, and there is a polynomial-time algorithm to find the spanning subgraph.</P>