• Journal of Radiation Protection and Research
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• v.36 no.1
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• pp.28-34
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• 2011

The measurement-based verification for intensity modulated radiation therapy (IMRT) is a time-and labor-consuming procedure. Instead, this study aims to develop a MU fluence reconstruction method for IMRT QA. Total actual fluences from treatment planning system (TPS, Eclipse 8.6, Varian) were selected as a reference. Delivered leaf positions according to MU were extracted by the dynalog file generated after IMRT delivery. An in-house software was develop to reconstruct MU fluence from the acquired delivered leaf position data using MATLAB. We investigated five patient's plans delivered by both step-and-shoot IMRT and sliding window technologies. The total actual fluence was compared with the MU fluence reconstructed by using commercial software (Verisoft 3.1, PTW) and gamma analysis method (criteria: 3%/3 mm and 2%/1 mm). Gamma pass rates were $97.8{\pm}1.33$% and the reconstructed fluence was shown good agreement with RTP-based actual fluence. The fluence from step and shoot IMRT was shown slightly higher agreement with the actual fluence than that from sliding window IMRT. If moving from IMRT QA measurements toward independent computer calculations, the developed method can be used for IMRT QA. A point dose calculation method from reconstructed fluences is under development for the routine IMRT QA purpose.

• Radiation Oncology Journal
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• v.16 no.2
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• pp.177-184
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• 1998

Purpose : Radiotherapy has been the mainstay of the treatment of brain metastases. We evaluated the response rate, survival and prognostic factors of patients with brain metastases treated with radiotherapy for palliative purpose. Materials and Methods : From January 1994 through April 1997, in all 42 patients, a retrospective analysis was undertaken. Of these, 33 patients received whole brain irradiation with 30Gy in 10 daily fractions with or without a boost of 10Gy in 5 daily fractions to the site of solitary lesion. Nine patients failed to complete the planned treatment Results : Of 33 patients who finished radiotherapy, complete and partial response were observed in $4(12\%)$ patients and $22(67\%)$ ones, respectively. Overall response rate was $79\%$ and median survival was 4 months. In univariate analysis, prognostic factors affecting survival were initial neurologic function class(p=0.0136), extracranial tumor activity(p=0.042), and response after radiotherapy(p=0.001). Conclusion : We confirmed that whole brain irradiation is the effective means for treating the patient with brain metastases. initial neurologic function class, extracranial tumor activity, and response alter radiotherapy were identified as prognostic factors affecting survival.

• Journal of Music and Human Behavior
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• v.6 no.2
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• pp.71-100
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• 2009

The purpose of this study was to examine the effect of group music therapy program on alineation of adolescents from enmeshed or disengaged families. The Family Adaptability and Cohesion Evaluation Scales III was administered to screen out subjects at a high school in Seoul. Based on the low scores, between 10 and 25, rated on the scale, 4 students were selected from 148 initial respondents. Subjects participated in group music therapy program for 7 weeks and a total of 14 music therapy sessions were provided for them. After the program, content analysis of the subjects' verbal and musical expressions observed during the program was conducted, with regard to the measures of the Student Alienation Scale. The results showed negative self-expression decreased while positive self-concepts increased. These results indicate that by providing the opportunity to experience group cohesiveness and group support, group music therapy program may effectively reduce alienation of adolescents from enmeshed or disengaged families.

• Journal of the korean academy of Pediatric Dentistry
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• v.35 no.2
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• pp.243-258
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• 2008

The purpose of this study was to investigate the relationship between the stages of calcification of various teeth and skeletal maturity stages among Korean individuals. The study subjects consisted 154 female and 179 male ranging from 7 years to 16 years of age. A total of 333 hand-wrist, cephalo-lateral and panoramic radiographs were obtained and analyzed. The tooth development of the mandibular canines, first, second premolars, and second molars were assessed according to the Dermijian's system. Skeletal maturity stages were determined from hand-wrist radiographs by using the SMI system and cephalo-lateral radiographs by using the CVMS, respectively. The results were as follows. 1. The mean ages of each stage of skeletal maturity were consistently younger in female subjects. 2. There was a high correlation between skeletal maturity of hand-wrist and cervical vertebrae in the both sexes. 3. There was a high correlation between skeletal maturity and dental calcification stage of mandibular canines, first premolar, second premolars, and second molar. 4. The mandibular second molar was tooth showing the highest correlation. 5. Percent distributions of the relationship between calcification stages of individual teeth and stages of skeletal maturity were obtained in both sexes. In summary, this suggests that tooth calcification stages from panoramic radiographs might be clinically useful as a maturity indicator of the pubertal growth period.

• Journal of the korean academy of Pediatric Dentistry
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• v.45 no.1
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• pp.1-9
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• 2018

The purpose of this study is to identify the factors affecting the treatment outcome after surgical-orthodontic treatment of the maxillary impacted incisors using multiple regression analysis. The study enrolled 83 patients who had surgical-orthodontic treatment in impacted maxillary central incisor between January 2005 and December 2015. Possible explanatory variables related to the prognosis of impacted incisor were age, gender, tooth developmental stage, height, position and angle of the teeth. The results of multiple regression analysis showed that as the height of the stem cell from apical papilla (SCAP) increased, the tooth length ratio increased by 0.345 units (p < 0.01). There was no statistically significant difference in gender, tooth development stage, distance and angle between the center line and the tooth, and the height of incisal tip of the tooth. In conclusion, the height of the SCAP of the impacted central incisor is factor affecting the tooth length after orthodontic traction.

• Proceedings of the Korean Society of Medical Physics Conference
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• 2003.09a
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• pp.54-54
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• 2003

목적 : 방사선치료는 복잡하고 다양한 장비를 이용하여 고에너지 고선량의 방사선을 다루기 때문에 세심한 정도관리를 바탕으로 기술적 관점에서의 적절한 방사선치료장비 사용과 실제 환자치료시의 절차들에 대한 완벽한 지침서가 마련되어야 할 필요가 있다. 본 연구의 목적은 의료용 선형가속기에 연관된 방사선사고와 잠재적 사고유형들을 분석하여 환자와 종사자의 안전을 보장하고 사고를 예방키 위한 안전관리 기준을 개발하고자 하였다. 대상 및 방법 : 본 연구에서는 국내 13 개 방사선치료기관에 대한 안전관리 실태를 자체 개발한 100 여 문항의 설문으로 조사, 분석하였다. 또한, 국제적으로 사용하고 있는 안전관리기준들과 보고된 방사선 사고사례 들을 조사하였고, 방사선치료 전 과정을 통해 잠재적 사고유형을 추정함으로서 방사선치료의 안전관리를 위 해 필요한 요구사항들을 도출하고 이를 바탕으로 의료용 선형가속기에 관련된 안전관리 기준을 마련하였다. 결과 : 본 연구에서는 방사선치료 시 환자와 종사자의 안전을 보장하고 사고방지를 위하여 단계별 안전관리 기준을 개발하였으며, 방사선 치료과정에서 일어날 수 있는 다양한 실수나 사고들을 일목요연하게 관리 할 수 있는 흐름도를 구축하였다. 결론 : 본 연구 결과는 방사선치료에 사용되는 선형가속기에 대한 방사선의 안전과 품질보증을 개선하게 될 것으로 생각된다. 또한, 잠재적 방사선 사고의 예방뿐 아니라 국내의 방사선치료 안전관리 기준 마련에 기초자료로 활용될 수 있을 것이다.

• Korean Journal of Social Welfare
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• v.68 no.2
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• pp.161-184
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• 2016

The purpose of this study was to explore the perceptions in treatments and experiences of attention-deficit hyperactivity disorders (ADHD) for mothers parenting a child with ADHD. Using Giorgi's 4 stages, this study investigated the meaning of ADHD treatments for mothers. Data were collected from December 2014 to February 2015 for 3 months with a sample of 13 mothers of children with ADHD via in-depth interviews. Collected data was analyzed using an interpretative phenomenological approach. Dominant issues identified were: I (mother) need to be changed for my child; Through mothers' experiences of lack of self-determination about a child with ADHD, they realized ignorance, chaos, and anxiety. While they experience multiple negative feeling, there is a positive change with unresolved issues. The findings highlight the correct awareness of ADHD and incorporated therapies for mothers and children with ADHD to improve treatment retention. Also, specialized services would be developed for mothers to promote their positive attitude to life, which is vital to cultivating the correct self-awareness.

• Journal of Korean Orthopaedic Sports Medicine
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• v.6 no.2
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• pp.83-87
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• 2007

투구운동은 견관절에 반복적인 압박력 및 신장력을 가하게 되며 이는 견관절의 정적 안정력의 약화를 유발하게 된다. 초기의 경도의 불안정성은 근육 등 동적 안정력의 작용으로 안정적인 운동상태를 유지할 수 있으나 반복적인 운동이 지속될 경우 근육이 피로해 져서 동적 안정력의 보상작용을 통한 안정성을 얻을 수 없게 된다. 이는 일차적으로 견관절의 불안정성을 유발할 뿐만 아니라, 이차적으로 견봉하 충돌증후 및 내적 충돌증후 등의 증상을 나타내기도 한다. 과 투구로 인한 대부분의 운동손상은 보존적 치료로 좋은 결과를 볼 수 있으며, 이는 일차적으로 투구를 중지하여 관절을 안정시키며 진통 소염제나 물리치료 등을 통한 항 염증치료, 그리고 회전근개 및 견갑골 주위근육의 강화운동 등의 단계로 진행된다. 적절한 보존적 치료에도 불구하고 증상이 지속될 경우 정확한 진단에 근거한 수술적 치료 및 조절된 재활운동 프로그램을 통해 조기 운동 복귀를 기대할 수 있다.

• 대한정형외과스포츠의학회:학술대회논문집
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• 2007.04a
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• pp.52-57
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• 2007

투구운동은 견관절에 반복적인 압박력 및 신장력을 가하게 되며， 이는 견관절의 정적 안정력의 약화를 유발하게 된다. 초기의 경도의 불안정성은 근육 동 동적 안정력의 작용으로 안정적인 운동상태를 유지할 수 있으나， 반복적인 운동이 지속될 경우 근육이 피로해 져서 동적 안정력의 보상작용을 통한 안정성을 얻을 수 없게 된다. 이는 일차적으로 견관절의 불안정성을 유발할 뿐만 아니라， 이차적으로 견봉하충돌증후 및 내적충돌증후 등의 증상을 나타내기도 한다. 과 투구로 인한 대부분의 운동손상은 보존적 치료로 좋은 결과를 볼 수 있으며， 이는 일차적으로 투구를 중지하여 관절을 안정시키며 진통 소염제나 물리치료 등을 통한 항 염증치료， 그리고 회전건개 및 견갑골주위근육의 강화운동 둥의 단계로 진행된다. 적절한 보존적 치료에도 불구하고 증상이 지속될 경우 정확한 진단에 근거한 수술적 치료 및 조절된 재활운동 프로그램을 통해 조기 운동 복귀를 기대할 수 있다.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2023.11a
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• pp.351-352
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• 2023

동물용 고압산소치료 시 산소를 통한 가압은 이미 있는 공기를 제거하고 산소로 대치시키는데 효율성이 떨어져서 100%에 가까운 산소분압을 구현하는데 어려움이 있고, 그 방법도 표준화되지 않았다. 따라서 어떠한 방식의 산소가압이 신속하고 효율적으로 100%에 가까운 산소분압을 구현할 수 있는지에 대한 방안을 개발하고 표준화할 필요가 있다. 동물용 고압산소치료를 활용한 동물실험이나 동물의 치료 중 가압 단계에서 간헐적 환기 방법이 더 신속하게 100%에 가까운 산소 분압을 보이므로 향후 표준 지침 개발을 위한 중요한 기반 연구와 제안으로 활용 가능하다. 이는 재난 기반으로의 고압산소챔버의 활용을 위한 기초 자료가 될 것이다.