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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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For accurate shielding of irregular shaped organ, a synchronizing instrument and it's auxiliary device for the field shaping with lead shots have been developed, in adition to minimize penumbra region, for Co-60 teletherapy. The contours to be shielded area in the field which was already drawn on the roentgenogram taken under the identical condition to those of the treatment were cut out of a piece of styrofoam at the adequate position by using the synchronizer. In cutting out of styrofoam, electric current is the most recommendable to obtain a clean edge. Styrofoam, its cut out cavities were filled with the commercial lead shots, found to be effective for the shielding of desired area. These techniques have been practically applied to eleven patients. Two of them were the cases of the malignant lymphoma which was involved to the cervicaly lymph nodes bilaterally and nine of them were the cases of the carcinoma of the breast after the radical lymph nodes bilaterally and nine of them were the cases of the carcinoma of the breast after the radical or a bilateral simple mastectomy. To settle down the patient in steady state during the treatment session, also a piece of styrofoam board which was scoped out extremely identical to the curbed surface of the back of the body were used. In an experimental study, authors found that was ideal to keep the patient from radiation damage by means of backscatter and or secondary electrons emitted from the material. And radiation interactions with styrofoam were found to be air equivalent.
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