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- 저자 : 박용휘(Y . W . Bahk) (검색결과 4 건)
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정수교(S. K. Chung),박용휘(Y. W. Bahk),양우진(W. J. Yang),연수경(S. K. Yeon),신경섭(K. S. Shinn) 대한핵의학회 1994 핵의학 분자영상 Vol.28 No.1
Colloid uptake in various hepatic conditions such as focal nodular hyperplasia, regenerating noduies in the cirrhotic liver, hamartoma, hemangioma and rarely hepatoma has been documented. Extrahepatic tumors may show colloid uptake and they include splenic hemangioma, malignant fibrous histiocytoma, breast carcinoma and Kaposis sarcoma. The mechanism of colloid uptake in those lesions is associated with phagocytic activity in or around the tumors. We report a pancreas islet cell tumor that showed colloid uptake on 99mTc-phytate liver scan without histologic evidence of phagocytosis by tumor cells or infiltration of phagocytes in the tumor. Microscopically the tumor was highly vascular and showed diffuse hemorrhage throughtout the turnor. We postulated that extravasation of the colloid into the tumor insterstitium caused nonspecifi colloid uptake in this tumor. It is expected that hemorrhagic tumor may show nonsper.ific colloid uptake without phagocytosis in or about the lesion.
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A Thermoprofile Study of 2,450-MHz Microwave Thermogenerator in Phantom and Animal Tumor
윤세철(S.C. Yoon),길학준(H.J. Gil),박용휘(Y.W. Bahk),추성실(S.S. Chu) 대한방사선종양학회 1986 Radiation Oncology Journal Vol.4 No.2
온열요법이 암환자치료에 있어 온열요법 단독 또는 방사선치료나 일부 항암화학요법제와 병행할 때 그 효과가 상승되고 있음은 최근 잘 알려진 사실이다. 가톨릭의대부속 강남성모병원 방사선치료실에서는 온열요법의 동물실험과 더 나아가 임상응용을 목적으로 가정용 전자레인지를 개조하여 극초단파유도관을 제작, 부착시킴으로서, 실험 및 종양부위에 2,450MHz 극초단파를 조사할 수 있는 장치를 제작하였다. 아울러 이 온열치료장치가 온열치료기로서의 적합성을 알아보기 위하여 본 실험을 실시하였다. 실험을 위한 phantom으로, 고기덩어리와 한천을 이용하였으며, 마우스하지에 발생시킨 Sarcom-180고형종양을 또한 이용하여, 이 온열치료기의 전압변동에 따른 온도분포 변화를 측정하였다. 한편 실험동물종양에서는 종양조직내 온도가 주위 정상조직보다 1~3℃ 높은 것을 확인할 수 있었다. Since March 1985, we have treated cancer patients with local hyperthermia using a 2,450-MHz microwave thermogenerator. Prior to clinical trial, a 2,450-MHz microwave generator remodeled from a household electric range was tested and evaluated to test its clinical applicability. We studied the thermoprofile and tried to find out suitable electric power ranges to produce optimal temperature of 42-44℃ in a lump of meat, agar phantom and animal tumor models. The present study confirmed the intratumoral temperature to be 1-3℃ higher than in surrounding normal tissue.
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윤세철(S.C. Yoon),권형철(H.C.Kwon),오윤경(Y.K.Oh),김종우(J.W. Kim),박용휘(Y.W.Bahk) 대한방사선종양학회 1984 Radiation Oncology Journal Vol.2 No.2
Radiation therapy(RT) has been used in the treatment of breast cancer for over 80 years. Technically, it should include a part or all of such areas as chest wall or breast, axilla, internal mammary nodes(I.M) and supraclavicular nodes(SCL). Authors tried three . field technique for the treatment of breast cancer using 6-MV linear accelerator, exclusively the department of radiology, Kang . Nam St. Mary's Hospital, at Catholic Medical College. The field junction was checked by a phantom study and radiation doses measured by film densitometry and TLD. The 3 fields we used in this study were two isocentric opposing tangential fields encompassing the breast, chest wall and occasionally IM and one single anterior field encompassing the axilla and SCL. Using appropriate beam blocks and boluses, we were able to avid unwanted intrinsic divergency of photon beam. Blocking also enabled us to set-up precise radiation field with ease.
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