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이하윤,정진욱,강석우,정효철,신동희,박미연,계광열,박종욱 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1
The new diazocine derivatives, 1-DAN and 2-DAN have been successfully synthesized and characterized. 1-DAN and 2-DAN, are different the positions of naphthyl substituted in the anthracene. 1-DAN and 2-DAN showed absorption in the range of 354 to 402 nm in the film state and exhibited blue photoluminescence (PL) emissions at 441 and 450 nm, respectively. The PL wavelength of 1-DAN was blue-shifted by 9 nm than that of 2-DAC. This is because the conjugation length is decreased by H atom-H atom repulsion between 1-naphthyl and anthracene. Organic light emitting diode (OLED) device using 2-DAN as emitting layer (EML) showed current efficiency of 1.76 cd/A.
이하윤,금기창,장지석,이익재,박광우,김용배,서창옥,김준원 대한방사선종양학회 2013 Radiation Oncology Journal Vol.31 No.4
Purpose: We explored whether the deep inspiration breath hold (DIBH) technique using Abches during left-sided breast irradiation was effective for minimizing the amount of radiation to the heart and lung compared to free breathing (FB). Materials and Methods: Between February and July 2012, a total of 25 patients with left-sided breast cancer underwent two computed tomography scans each with the DIBH using Abches and using FB after breast-conserving surgery. The scans were retrospectively replanned using standardized criteria for the purpose of this study. The DIBH plans for each patient were compared with FB plans using dosimetric parameters. Results: All patients were successfully treated with the DIBH technique using Abches. Significant differences were found between the DIBH and FB plans for mean heart dose (2.52 vs. 4.53 Gy), heart V30 (16.48 vs. 45.13 cm3), V20 (21.35 vs. 54.55 cm3), mean left anterior descending coronary artery (LAD) dose (16.01 vs. 26.26 Gy, all p < 0.001), and maximal dose to 0.2 cm3 of the LAD (41.65 vs. 47.27 Gy, p = 0.017). The mean left lung dose (7.53 vs. 8.03 Gy, p = 0.073) and lung V20 (14.63% vs. 15.72%, p = 0.060) of DIBH using Abches were not different significantly compared with FB. Conclusion: We report that the use of a DIBH technique using Abches in breathing adapted radiotherapy for left-sided breast cancer is easily feasible in daily practice and significantly reduces the radiation doses to the heart and LAD, therefore potentially reducing cardiac risk.