근거리 수치사진측량의 정확도 향상에 관한 연구

박운용,김진수,정공운 동아대학교 건설기술연구소 2003 硏究報告 Vol.27 No.1

As state-of-the-art usually high-quality digital cameras are used for photogrammetric industrial metrology. Digital high-resolution consumer cameras are widely available. and are increasingly used in close-range photogrammetry. The mechanical construction of the cameras often do not meet photogrammetric requirements, thus they have to be modelled sufficiently. The close-range photogrammetry is a surveying technique the acquiring the 3D object from 2D geometric appearance shown in the image. Camera treatment is relatively so simple. Camera position refer to the object can be freely adjusted by locating the exposure station at any site. So it is used effectively a small area or object for survey. In this study, suing the digital camera which has capacity of keeping numerical value by itself and easy carrying, we analyze the positioning error according to various change of photographing condition. Also we try to find effective method of acquiring basis data for 3D monitoring of high-accuracy in sub-pixel degree through digital close-range photogrammetry with bundle adjustment for local terrain model generation.

Effectiveness of rosiglitazone on bleomycin-induced lung fibrosis: Assessed by micro-computed tomography and pathologic scores

Jin, Gong Yong,Bok, Se Mi,Han, Young Min,Chung, Myung Ja,Yoon, Kwon-Ha,Kim, So Ri,Lee, Yong Chul Elsevier 2012 European journal of radiology Vol.81 No.8

Radio Frequency Ablation in the Rabbit Lung Using Wet Electrodes: Comparison of Monopolar and Dual Bipolar Electrode Mode

Jin, Gong Yong,Park, Sang Hee,Han, Young Min,Chung, Gyung Ho,Kwak, Hyo Sung,Jeon, Soo bin,Lee, Yong Chul The Korean Radiological Society 2006 KOREAN JOURNAL OF RADIOLOGY Vol.7 No.2

<P><B>Objective</B></P><P>To compare the effect of radio frequency ablation (RFA) on the dimensions of radio frequency coagulation necrosis in a rabbit lung using a wet electrode in monopolar mode with that in dual electrode bipolar mode at different infusion rates (15 mm/hr versus 30 ml/hr) and saline concentrations (0.9% normal versus 5.8% hypertonic saline).</P><P><B>Materials and Methods</B></P><P>Fifty ablation zones (one ablation zone in each rabbit) were produced in 50 rabbits using one or two 16-guage wet electrodes with a 1-cm active tip. The RFA system used in the monopolar and dual electrode wet bipolar RFA consisted of a 375-kHz generator (Elektrotom HiTT 106, Berchtold, Medizinelektronik, Germany). The power used was 30 watts and the exposure time was 5 minutes. The rabbits were assigned to one of five groups. Group A (n = 10) was infused with 0.9% NaCl used at a rate of 30 ml/hr in a monopolar mode. Groups B (n = 10) and C (n = 10) were infused with 0.9% NaCl at a rate of 15 and 30 ml/hr, respectively in dual electrode bipolar mode; groups D (n = 10) and E (n = 10) were infused with 5.8% NaCl at a rate of 15 and 30 ml/hr, respectively in a dual electrode bipolar mode. The dimensions of the ablation zones in the gross specimens from the groups were compared using one-way analysis of variance by means of the Scheffe test (post-hoc testing).</P><P><B>Results</B></P><P>The mean largest diameter of the ablation zones was larger in dual electrode bipolar mode (30.9±4.4 mm) than in monopolar mode (22.5±3.5 mm). The mean smallest diameter of the ablation zones was larger in dual electrode bipolar mode (22.3±2.5 mm) than in monopolar mode (19.5±3.5 mm). There were significant differences in the largest and smallest dimension between the monopolar (group A) and dual electrode wet bipolar mode (groups B-E). In dual electrode bipolar mode, the mean largest diameter of the ablation zones was larger at an infusion rate of 15 ml/hr (34.2±4.0 mm) than at 30 ml/hr (27.6±0.1 mm), and the mean smallest diameter of the ablation zones was larger at an infusion rate of 15 ml/hr (27.2±7.5 mm) than at an infusion rate of 30 ml/hr (24±2.9 mm).</P><P><B>Conclusion</B></P><P>Using a wet electrode, dual electrode bipolar RFA can create a larger ablation zone more efficiently than monopolar RFA.</P>

Radio Frequency Ablation in the Rabbit Lung Using Wet Electrodes: Comparison of Monopolar and Dual Bipolar Electrode Mode

Gong Yong Jin,Sang Hee Park,Young Min Han,Gyung Ho Chung,Hyo Sung Kwak,Soo bin Jeon,Yong Chul Lee 대한영상의학회 2006 Korean Journal of Radiology Vol.7 No.2

무증상 정상인 또는 환자의 관상동맥 질환 선별 검사로서 관상동맥 전산화단층촬영 혈관조영술의 유용성

Jin Gong Yong 대한영상의학회 2022 대한영상의학회지 Vol.83 No.1

Early detection of potential asymptomatic coronary artery disease is very important, as patients with sudden cardiac death often do not show symptoms such as chest pain or motor dyspnea. Coronary CT angiography (CCTA) has long been unjustified as a screening tool for asymptomatic patients because of the risks posed by radiation exposure. However, there are still various opinions regarding the usefulness of CCTA for screening for coronary artery disease (CAD) in asymptomatic healthy individuals or patients. This review investigated the usefulness of coronary artery calcium score and CCTA as screening tests for CAD in asymptomatic healthy individuals or patients through various literature reviews. With the development of CT technology, recent studies have been conducted in asymptomatic CAD patients with a reduced radiation dose of less than 1 mSv. A total of 2.6% of asymptomatic subjects on CCTA found significant CAD over 70%, and it was concluded that screening CCTA for CAD showed prognostic power in predicting the future occurrence of CAD in asymptomatic people. However, after the completion of the current NIH SCOT-HEART 2 study, it may be possible to determine whether CCTA is appropriate as a screening tool for CAD in asymptomatic healthy individuals. 심장 돌연사 환자들은 종종 흉통 또는 운동성 호흡곤란 등의 전조증상이 나타나지 않기 때문에 잠재적인 무증상 관상동맥 질환을 조기에 발견하는 것이 매우 중요하다. 관상동맥 전산화단층촬영 혈관조영술은 방사선 노출로 인한 위험성 때문에 무증상 환자에서 스크리닝 검사로 정당화되지 못했었지만 최근에 전산화단층촬영 기술의 비약적인 발전으로 방사선량을1 mSv 미만으로 최소화함으로써 무증상 환자의 관상동맥 질환 선별 검사의 유용성에 대한많은 연구가 진행되어 왔다. 그러나, 여전히 무증상 정상인 또는 환자의 관상동맥 질환 선별검사에 대한 관상동맥 전산화단층촬영 혈관조영술의 유용성에 대해서는 다양한 의견들이 있다. 이 종설에서는 무증상 정상인 또는 환자들에게 관상동맥 질환 선별 검사로 관상동맥 칼슘점수와 관상동맥 전산화단층촬영 혈관조영술 유용성에 대해서 다양한 문헌고찰을 통해서 알아보았다. 관상동맥 전산화단층촬영 혈관조영술상 무증상 정상인의 2.6%에서 70% 이상의유의한 관상동맥 협착이 발견되었고, 선별 목적의 관상동맥 전산화단층촬영 혈관조영술이 무증상 건강한 사람의 미래의 심혈관 질환 발생을 예측할 수 있다. 그러나 현재 미국국립보건원에서 진행하고 있는 SCOT-HEART 2 연구가 끝나면 관상동맥 전산화단층촬영 혈관조영술이무증상 성인의 심혈관 예방에 선별 검사로 적절한지 결정을 내릴 수 있을 것으로 생각된다

영상의학에서 폐영상 판독과 자료체계: 강점, 단점, 그리고 개선

Gong Yong Jin 대한영상의학회 2023 대한영상의학회지 Vol.84 No.1

In 2019, the American College of Radiology announced Lung CT Screening Reporting & Data System (Lung-RADS) 1.1 to reduce lung cancer false positivity compared to that of Lung-RADS 1.0 for effective national lung cancer screening, and in December 2022, announced the new Lung-RADS 1.1, Lung- RADSⓇ 2022 improvement. The Lung-RADSⓇ 2022 measures the nodule size to the first decimal place compared to that of the Lung-RADS 1.0, to category 2 until the juxtapleural nodule size is < 10 mm, increases the size criterion of the ground glass nodule to 30 mm in category 2, and changes categories 4B and 4X to extremely suspicious. The category was divided according to the airway nodules location and shape or wall thickness of atypical pulmonary cysts. Herein, to help radiologists understand the Lung-RADSⓇ 2022, this review will describe its advantages, disadvantages, and future improvements.

Interstitial Lung Abnormality in Asian Population

Gong Yong Jin 대한결핵및호흡기학회 2024 Tuberculosis and Respiratory Diseases Vol.87 No.2

Interstitial lung abnormalities (ILAs) are radiologic abnormalities found incidentallyon chest computed tomography (CT) that can be show a wide range of diseases, fromsubclinical lung fibrosis to early pulmonary fibrosis including definitive usual interstitialpneumonia. To clear up confusion about ILA, the Fleischner society published aposition paper on the definition, clinical symptoms, increased mortality, radiologic progression,and management of ILAs based on several Western cohorts and articles. Recently,studies on long-term outcome, risk factors, and quantification of ILA to addressthe confusion have been published in Asia. The incidence of ILA was 7% to 10% for Westerners, while the prevalence of ILA was about 4% for Asians. ILA is closely relatedto various respiratory symptoms or increased rate of treatment-related complicationin lung cancer. There is little difference between Westerners and Asians regarding theclinical importance of ILA. Although the role of quantitative CT as a screening tool forILA requires further validation and standardized imaging protocols, using a thresholdof 5% in at least one zone demonstrated 67.6% sensitivity, 93.3% specificity, and 90.5%accuracy, and a 1.8% area threshold showed 100% sensitivity and 99% specificity inSouth Korea. Based on the position paper released by the Fleischner society, I wouldlike to report how much ILA occurs in the Asian population, what the prognosis is, andreview what management strategies should be pursued in the future.

A Rare Occurrence of Paragonimiasis Accompanied by Cryptococcal Pneumonia

( Hwan Jin Lee ),( Jun Hyung Park ),( Gong Yong Jin ),( Ae Ri Ahn ),( Yong Chul Lee ),( Jae Seok Jeong ) 대한결핵 및 호흡기학회 2023 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.136 No.0

Endoscopic Findings of Upper Gastrointestinal Involvement in Primary Vasculitis

Eun Jeong Gong,Do Hoon Kim,Joo Hyun Chun,Ji Yong Ahn,Kwi-Sook Choi,Kee Wook Jung,Jeong Hoon Lee,Kee Don Choi,Ho June Song,Gin Hyug Lee,Hwoon-Yong Jung,Jin Ho Kim,송인혜,Yong-Gil Kim 거트앤리버 소화기연관학회협의회 2016 Gut and Liver Vol.10 No.4

Background/Aims: Gastrointestinal involvement in vasculitis may result in life-threatening complications. However, its variable clinical presentations and endoscopic features, and the rarity of the disease, often result in delayed diagnosis. Methods: Clinical characteristics, endoscopic features, and histopathological findings were reviewed from medical records. Results: Of 6,477 patients with vasculitis, 148 were diagnosed as primary vasculitis with upper gastrointestinal involvement. Of these, 21 cases (14.2%) were classified as large-vessel vasculitis, 17 cases (11.5%) as medium-vessel vasculitis, and 110 cases (74.3%) as small-vessel vasculitis. According to the specific diagnosis, IgA vasculitis (Henoch- Schönlein purpura) was the most common diagnosis (56.8%), followed by Takayasu arteritis (14.1%), microscopic polyangiitis (10.1%), and polyarteritis nodosa (6.8%). Gastrointestinal symptoms were present in 113 subjects (76.4%), with abdominal pain (78.8%) the most common symptom. Erosion and ulcers were striking endoscopic features, and the second portion of the duodenum was the most frequently involved site. Biopsy specimens were obtained from 124 patients, and only eight (5.4%) presented histopathological signs of vasculitis. Conclusions: Diagnosis of vasculitis involving the upper gastrointestinal tract is difficult. Because of the widespread use of endoscopy, combining clinical features with endoscopic findings may facilitate making appropriate diagnoses; however, the diagnostic yield of endoscopic biopsy is low.

Whole-Body Magnetic Resonance Imaging for Staging Metastatic Thymic Carcinoma

Han, Hyo Jin,Park, Seoung Ju,Min, Kyung Hoon,Kim, So Ri,Lee, Min Hee,Chung, Chi Ryang,Choi, Kyoung Hwa,Rhee, Yang Keun,Jin, Gong Yong,Chung, Myung Ja,Lee, Yong Chul American Thoracic Society 2011 American journal of respiratory and critical care Vol.183 No.11