• The Journal of the Korea Contents Association
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• v.13 no.9
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• pp.288-294
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• 2013

Chest digital tomosynthesis was the most advanced digital radiography technology, but it was higher patient dose than conventional chest radiography. Thus we tried to reduce a patient dose of chest digital tomosynthesis and evaluated its image quality. Result shows that radiation dose such as ESD, DAP and ED were 1.95 mGy, 17.66 $dGycm^2$ and 0.133 mSv respectively in default setting and 0.312 mGy, 2.27 $dGy.cm^2$ and 0.052 mSv in use additional filter, respectively. Doses were decrease 66.2%, 73.6% and 57.4% in ESD, DAP and ED, respectively. At the image quality assessment, overall sensitivities of use additional filter for nodule detection were not inferior to default mode for peripheral, central and peripheral micro nodules. However, sensitivity of low dose mode was significantly inferior to the default for central micro-nodules(p < .001).

• Journal of Chest Surgery
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• v.34 no.5
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• pp.414-417
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• 2001

흉부 대동맥의 비 외상성 자연 파열은 매우 드물지만, 발생시 응급수술이 요하는 위중한 질환이다. 본원에서는 전산화 단층 촬영과 경식도 초음파로 진단하고 부분 대동맥궁 치환술로 성공적으로 치료된 후 흉부 대동맥의 비 외상성 지연 파열 1례를 체험하였기에 문헌고찰과 더불어 보고하는 바이다.

• Tuberculosis and Respiratory Diseases
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• v.39 no.1
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• pp.15-23
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• 1992

Background: The prognosis of lung cancer remains poor and early detection and curative surgery is still the most effective treatment for many. In the early detection of lung cancer, sputum cytology and simple chest x-ray are used, but both of these tests are far from being perfect. So we studied the characteristics of patients diagnosed as lung cancer without demonstrable mass lesion on simple chest x-ray to help in the early diagnosis of lung cancer. Methods: We conducted a retrospective study on 11 subjects who were diagnosed as lung cancer at Seoul National University Hospital between August 1986 and June 1989 and had no demonstrable mass lesion on simple chest x-rays. Results: Ten of 11 patients were male, 8 had a history of smoking, most frequent symptoms were sputum, cough, and hemoptysis, and 3 patients either had wheezing or stridor. In 3 of the cases, although there were no mass lesion, there were ill-defined infiltration, major fissure thickening, and fibrostreaky density mimiking tuberculosis where the tumor was eventually found and in one patient tumor was masked by a rib shadow. Also in one case, lateral chest film demonstrated a retrocardiac mass. Both bronchoscopy and computed tomogram were useful in the localization of the tumor. Seven of 11 had relatively early disease (less than StageII). Four of 11 are still alive without any evidence of recurrence between 2 and a half and 4 years after the operation. Conclusion: We conclude that in patients with respiratory symtoms in whom cancer cannot be ruled out, sputum cytology and lateral chest x-rays should be taken and that if necessary further studies like computed tomogram and bronchoscopy should be done to aid in the early diagnosis of lung cancer.

• Tuberculosis and Respiratory Diseases
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• v.55 no.6
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• pp.551-559
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• 2003

Background : Emergency management in hemoptysis is bronchial artery angiography and embolization. This study was designed to investigate the accuracy of localization of bleeding site by simple roentgenogram, computed tomography(CT) and bronchoscopy prior to embolization and to evaluate the outcome of embolotherapy. Method : We retrospectively evaluated 50 patients performed bronchial artery embolization(BAE), admitted to tertiary university hospital due to hemoptysis. Results : The most common causes were pulmonary tuberculosis, old tuberculous related parenchymal damage, aspergilloma, and bronchiectasis. The success rate of BAE within one month was 90%; within 3 months was 88%; during follow up period of mean 11.6 months was 76%. The concordant rate of simple roentgenogram with angiographic outcome in terms of bleeding site is 70%; in chest CT 80%; in bronchoscopy 81%; in combined information of simple roentgenogram and CT 83%; in combined information of simple roentgenogram and bronchoscopy 78%. Conclusion : The diagnostic accuracy for the bleeding site was similar between chest CT and bronchoscopy, showing high diagnostic yield. The success rate of BAE was comparative to prior studies. Further study will be needed in a large scale in near future.

• Journal of Chest Surgery
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• v.42 no.5
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• pp.624-629
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• 2009

Background: Making the histologic diagnosis of small pulmonary nodules and ground glass opacity (GGO) lesions is difficult. CT-guided percutaneous needle biopsies often fail to provide enough specimen for making the diagnosis. Video-assisted thoracoscopic surgery (VATS) can be inefficient for treating non-palpable lesions. Preoperative localization of small intrapulmonary lesions provides a more obvious target to facilitate performing intraoperative. resection. We evaluated the efficacy of CT-guided localization with using a hook wire and this was followed by VATS for making the histologic diagnosis of small intrapulmonary nodules and GGO lesions. Material and Method: Eighteen patients (13 males) were included in this study from August 2005 to March 2008. 18 intrapulmonary lesions underwent preoperative localization by using a CT-guided a hook wire system prior to performing VATS resection for intrapulmonary lesions and GGO lesions. The clinical data such as the accuracy of localization, the rate of conversion-to-thoracotomy, the operation time, the postoperative complications and the histology of the pulmonary lesion were retrospectively collected. Result: Eighteen VATS resections were performed in 18 patients. Preoperative CT-guided localization with a hook-wire was successful in all the patients. Dislodgement of a hook wire was observed in one case. There was no conversion to thoracotomy, The median diameter of lesions was 8 mm (range: $3{\sim}15\;mm$). The median depth of the lesions from the pleural surfaces was 5.5 mm (range: $1{\sim}30\;mm$). The median interval between preoperative CT-guided with a hook-wire and VATS was 34.5 min (range: ($10{\sim}226$ min). The median operative time was 43.5.min (range: $26{\sim}83$ min). In two patients, clinically insignificant pneumothorax developed after CT-guided localization with a hook-wire and there were no other complications. Histological examinations confirmed 8 primary lung cancers, 3 cases of metastases, 3 cases of inflammation, 2 intrapulmonary lymph nodes and 2 other benign lesions. Conclusion: CT-guided localization with a hook-wire followed by VATS for treating small intrapulmonary nodules and GGO lesions provided a low conversion thoracotomy rate, a short operation time and few localization-related or postoperative complications. This procedure was efficient to confirm intrapulmonary lesions and GGO lesions.

• 보건세계
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• v.55 no.6
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• pp.52-55
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• 2008

• Journal of Chest Surgery
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• v.31 no.7
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• pp.730-734
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• 1998

Background: It is important to know the location, number, size and shape of bullae before thoracotomy or VATS bullectomy. Chest X-ray and chest CT may be used but with some limitation. The purpose of this study was to compare the diagnostic value of thoracography with that of chest X-ray in preoperative detection of bullae. Meterial and Method: Thoracography was performed by injection of non-ionic water-soluble dye into pleural space in 22 primary spontaneous pneumothoraces, which underwent thoracotomy or VATS bullectomy. Chest X-ray and thoracography were compared through operative finding. Results: Sensitivity and accuracy of thoracography(75% and 72.7%) were higher than those of chest X-ray(30% and 36.4%). However, specificity of thoracography(50%) was lower than that of chest X-ray (100%). There were no complications during or after thoracography. Conclusion: Thoracography is a safer and more useful method for preoperative detection of bullae when compared with chest X-ray.

• Journal of Chest Surgery
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• v.33 no.12
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• pp.974-977
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• 2000

유아에서 흔치 않지만, 선천적 혹은 후천적 원인으로 혈관에 의해 기도가 눌릴 수 있다. 8개월 남자 환아가 승모판 성형술, 동맥관 개존증 결찰 후 좌측 폐의 무기폐가 발생하였다. 흉부 컴퓨터 단층 촬영상 동맥관 개존증 결찰 후 남은 비대해진 하행대동맥에 의해 좌측 폐의 무기폐가 발생하였다. 흉부 컴퓨터 단층 촬영상 동맥관 개존증 결찰 후 남은 비대해진 하행대동맥에 의해 좌측 주기관지가 눌리는 소견이 관찰되었다. 결찰 부위를 완전히 분리하고 하행대동맥을 봉합하여 크기를 줄여 기관지 압박을 해결할 수 있었다. 술 후 환자는 특별한 합병증 없이 퇴원하였으며 외래 추적 관찰 중이다.

• Proceedings of the Korean Society of Radiological Science
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• 1992.05a
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• pp.16-17
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• 1992

• Proceedings of the Korean Society of Radiological Science
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• 1992.05a
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• pp.13.1-13.1
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• 1992