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Comparison of elective inguinal node irradiation techniques in anal cancer
Jihye Cha,Jinsil Seong,Ki Chang Keum,Chang Geol Lee,Woong Sub Koom 대한방사선종양학회 2011 Radiation Oncology Journal Vol.29 No.4
Purpose: To compare photon thunderbird with deep match (technique 1) with 3-field technique with electron inguinal boost (technique 2) in acute skin toxicity, toxicity-related treatment breaks and patterns of failure in elective inguinal radiation therapy (RT) for curative chemoradiation in anal cancer. Materials and Methods: Seventeen patients treated between January 2008 and September 2010 without evidence of inguinal and distant metastasis were retrospectively reviewed. In 9 patients with technique 1, dose to inguinal and whole pelvis area was 41.4 to 45 Gy and total dose was 59.4 Gy. In 8 patients with technique 2, doses to inguinal, whole pelvis, gross tumor were 36 to 41.4 Gy, 36 to 41.4 Gy, and 45 to 54 Gy, respectively. The median follow-up period was 27.6 and 14.8 months in group technique 1 and 2, respectively. Results: The incidences of grade 3 radiation dermatitis were 56% (5 patients) and 50% (4 patients), dose ranges grade 3 dermatitis appeared were 41.4 to 50.4 Gy and 45 to 54 Gy in group technique 1 and 2, respectively (p = 0.819). The areas affected by grade 3 dermatitis in 2 groups were as follow: perianal and perineal areas in 40% and 25%, perianal and inguinal areas in 0% and 50%, and perianal area only in 60% and 25%, respectively (p = 0.196). No inguinal failure has been observed. Conclusion: Photon thunderbird with deep match technique and 3-field technique with electron inguinal boost showed similar incidence of radiation dermatitis. However, photon thunderbird with deep match seems to increase the possibility of severe perineal dermatitis.
Cha, Jihye,Jeon, Tae-Won,Lee, Chang Geol,Oh, Sang Taek,Yang, Hee-Beom,Choi, Kyung-Ju,Seo, Daekwan,Yun, Ina,Baik, In Hye,Park, Kyung Ran,Park, Young Nyun,Lee, Yun-Han Taylor Francis 2015 International journal of hyperthermia Vol.31 No.7
<P>Modulated electro-hyperthermia (mEHT), also known as oncothermia, shows remarkable treatment efficacies for various types of tumours, including glioma. The aim of the present study was to investigate the molecular mechanism underlying phenotypic changes in oncothermic cancer cells.</P>
강원도 양구군 농업 지역 지하수에서의 미세플라스틱 발생과 분포
차지혜(Jihye Cha),이진용(Jin-Yong Lee),정은주(Eunju Jeong),김영인(Young-In Kim) 대한지질학회 2021 대한지질학회 학술대회 Vol.2021 No.10
본 연구에서는 우리나라 농업 지역의 지하수에서 미세플라스틱 발생 및 분포에 대해 조사하였다. 연구 지역인 해안 분지의 면적은 57.5 km2, 길이는 10.5 km, 폭 6.7 km이다. 분지는 사발 모양이고 고도는 400 m에서 1,242 m에 이르지만 대부분의 농업 활동은 400~600 m 높이에서 이루어진다. 해안면의 주요 작물은 인삼, 사과, 무(시래기)이다. 작물 생산 시 주로 멀칭을 많이 사용하며 분지 곳곳에서 버려진 멀칭을 발견할 수 있다. 이곳의 지하수 관정은 주로 농업용으로 사용하며 약 300개 이상이 있다. 관정의 깊이는 10~200 m이고 평균은 30 m이다. 따라서 미세플라스틱에 의한 지하수 오염 가능성이 있다. 연구를 위해 12개의 지하수 관정, 1개의 처리된 폐수 유출수, 1개의 하천수에서 미세플라스틱 시료를 채취하였다. 시료를 채취하기 전 미세플라스틱에 오염이 되지 않도록 시료 채취 장비를 실험실 그리고 현장에서 반복 세척하였다. 대부분의 시료채취 장비는 플라스틱이 아닌 스테인리스 스틸로 제작되었다.
Microfabrication and optical properties of highly ordered silver nanostructures
Cha, Hee-Ryoung,Lee, Jaeseon,Lee, Jae-Wook,Kim, Jong-Man,Lee, Jaebeom,Gwak, Jihye,Yun, Jae Ho,Kim, Yangdo,Lee, Dongyun Springer 2012 Nanoscale research letters Vol.7 No.1
<P>Using thermal evaporation, we fabricated five uniform and regular arrays of Ag nanostructures with different shapes that were based on an anodized aluminum oxide template and analyzed their optical properties. Round-top-shaped structures are obtained readily, whereas to obtain needle-on-round-top-shaped and needle-shaped structures, control of the directionality of evaporation, pore size, length, temperature of the substrate, etc., was required. We then observed optical sensitivity of the nanostructures by using surface-enhanced Raman scattering, and we preliminarily investigated the dependency of Raman signal to the roughness and shape of the nanostructures.</P>