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비스무스 차폐체 개발을 통한 소아 방사선검사의 피폭에 관한 연구
김훈(Hoon Kim),김용근(Yong-Keun Kim),김준년(Joon-Nyeon Kim),위승현(Seung-Hyun Wi),박은경(Eun-Kyung Park),채명준(Myung-Jun Chae),백부길(Bu-Gil Baek),김은혜(Eun-Hye Kim),임청환(Cheong-Hwan Lim) 대한방사선과학회(구 대한방사선기술학회) 2024 방사선기술과학 Vol.47 No.3
Currently, with the development of technologies, X-ray examinations for medical examinations at hospital is increasing. This study was conducted to help reduce radiation exposure by measuring the exposure dose received by pe- diatric patients and the spatial dose of the X-ray room. Dosimeters were installed in the eyeball, thyroid gland, breast, gonads and 4 directions at a distance of 30 cm, 40 cm, 50 cm from the phantom. The dose was measured ten times each, before, and after the application of the bismuth shield under the examination conditions of the head, chest, and abdomen of pediatric patients. Under the condition of head examination, when a shielding was applied, the dose reduc- tion rate was 68.58% for the eyeball, 72.88% for the thyroid, 84.2% for the breast, and 72.36% for the gonad. The chest examination showed reductions of 19.56% eyeball, 56.98% thyroid, 1.21% breast, and 0.68% gonad. The abdominal examination showed reduction rates of 2.6% eyeball, 10.67% thyroid, 19.85% breast, and 82.02% gonad. Spatial dose decreased by 62.25% at 30 cm, 61.16% at 40 cm, and 68.68% at 50 cm. When the bismuth shield was applied, there was a de- crease in dose across all examinations, as well as a reduction in spatial dose. Continued research on the use of bismuth shields will help radiological technologists achieve their goal of dose reduction.
좌심실 혈전을 동반한 스트레스 유발 심근병증으로 발현된 갈색세포종 1예
장덕현 ( Duck Hyun Jang ),박진식 ( Jin Sik Park ),강명신 ( Myung Shin Kang ),김태훈 ( Tae Hoon Kim ),신동희 ( Dong Hee Shin ),이지혜 ( Ji Hye Lee ),채명준 ( Myung Joon Chae ) 대한내과학회 2014 대한내과학회지 Vol.87 No.1
The clinical presentation of pheochromocytoma is variable. The classic symptoms are headache, diaphoresis, and tachycardia, with paroxysmal hypertension. Other less common cardiovascular manifestations, such as arrhythmias, angina pectoris, acute myocardial infarction, dilated cardiomyopathy, and acute heart failure, have been reported occasionally. We present the case of a middle-aged woman who had stress-induced cardiomyopathy with a left ventricular thrombus, due to the pheochromocytoma. The thrombus was embolized to the aorto-iliac bifurcation during hospitalization. We removed the thrombus by a catheter thromboembolectomy and performed a surgical left adrenalectomy. After the operation, all of her symptoms and the underlying diseases (hypertension, hyperglycemia, heart failure, dyslipidemia) resolved. (Korean J Med 2014;87:77-80)
장덕현 ( Duck Hyun Jang ),최락경 ( Rak Kyeong Choi ),함의근 ( Eo Kewn Ham ),심원흠 ( Won Heum Sim ),채명준 ( Myung Joon Chae ),이수연 ( Soo Youn Lee ),현주용 ( Joo Yong Hyun ) 대한내과학회 2013 대한내과학회지 Vol.84 No.1
Acute pulmonary embolism is considered a cardiovascular emergency and is one of the most important causes of morbidity and mortality in hospitalized patients. Tumor embolism is a rare and unique complication of malignancies, and detached thrombi or tumors may cause massive pulmonary embolism in patients with malignancies. The identification of the type of pulmonary embolism is critical because treatment and prognosis vary considerably. We report an unusual presentation of a tumor embolism that was misdiagnosed as a pulmonary thromboembolism in a young woman. The patient was initially treated with the anti-coagulants warfarin and aspirin, but her symptoms were aggravated after two months and she required emergency surgery. Histology revealed a pulmonary embolism due to metastatic chondrosarcoma. Following surgery, her condition deteriorated, and she did not survive. This case highlights the need to investigate the cause of pulmonary embolism should the patient not respond to anti-coagulatant therapy. (Korean J Med 2013;84:96-100)