• The Journal of the Korea Contents Association
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• v.21 no.7
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• pp.510-518
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• 2021

This study analyzed (1) the utility of telepractice in language assessment and (2) parental satisfaction for telepractice. Young children with language disabilities conducted REVT through both face-to-face and telepractice system. The correlation and paired t-test were analyzed. The results showed (1) the strong correlations between telepractice and face-to-face assessment scores. However, the telepractice score was significantly lower than face-to-face in the receptive vocabulary test and (2) the overall average of parental satisfaction for telepractice was 3.6 out of 5 points. The parents showed the highest satisfaction in terms of time and convenience of telepractice while the equivalence between telepractice and face-to-face item was the lowest. This study suggested the possibility and considerations in applying telepractice of language assessment in Korea.

• Product Safety
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• s.62
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• pp.21-24
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• 1998

현재 미국에서 국가적인 과제로 대두되어 여러 주에서 연구가 행해지고 있는 텔리메디신은 넓은 의미로는 통신기술을 이용하여 의학정보나 서비스 등을 전기적 신호로 바꾸어 한 장소에서 다른 장소로 전송하는 것을 말한다. 이 시스템을 이용하게 되면 원격진료가 가능해져 사막이나 산간 벽지에 있는 환자들도 종합병원에 종사하는 전문의에게서 치료나 진찰을 받을 수 있게 있다.

• Radiation Oncology Journal
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• v.9 no.2
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• pp.319-324
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• 1991

In our institution, a 76-year-old woman with primary urethral carcinoma was treated with remote afterloading high dose rate (HDR) interstitial brachytherapy using micro selectron Ir-192. In this paper, authors described the technical aspect of remote afterloading HDR interstitial brachytherapy for female urethal cancer.

• The Journal of Korean Society for Radiation Therapy
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• v.3 no.1
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• pp.45-50
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• 1989

Wedge filter are used in high energy radiation therapy to obtain uniform isodose lines at small volume tumor and irregular body surface. The aim of this study is not only to describe the method of construction and setting of semi-universal wedge filter for $^{60}Co$ radiation therapy but also to get the optimum treatment planning by clinical application of wedge filter.

• Radiation Oncology Journal
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• v.21 no.2
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• pp.112-117
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• 2003

Purpose: The effects of hypefractionation radiation therapy, such as the failure pattern and survival, on the treatment results in advanced stage head and neck cancer were studied. Materials and Methods: Between September 1990 and October 1998, 24 patients with advanced stage (III, IV) head and neck cancers, were treated using hyperfractionation radiation therapy in the Department of Radiation Oncology at the Keimyung University Dongsan Medical Center. The male to female ratio was 7 : 1, and the age range from 38 to 71 years with the median of 56 years. With regard to the TNM stage, 11 patients were stage III and 13 were stage IV. The sites of primary cancer were the nasopharynx in six, the hypopharynx in 6, the larynx in five, the oropharynx in three, the maxillary sinus in three, and the oral cavity in one patient. The radiotherapy was delivered by 6 MV X-ray, with a fraction size of 1.2 Gy at two fractions a day, with at least 6 hours inter-fractional interval. The mean total radiation doses was 72 Gy, (ranging from 64.4 to 75.8 Gy). Follow-up periods ranged between 3 and 136 months, with the median of 52 months. Results: The overall survival rates at 3 and 5 years in all patients were 66.7$\%$, and 52.4$\%$. The disease-free survival rates at 3 and S years (3YDFS, 5YDFS) in all patients were 66.7$\%$ and 47.6$\%$. The 3YDFS and 5YDFS in stage III patients were 81.8$\%$ and 63.6$\%$, and those in stage IV patients were 53.8$\%$ and 32.3$\%$. Ten patients were alive with no local nor distant failures at the time of analyses. Six patients (25$\%$) died due to distant metastasis and 12.5$\%$ died due to local failure. Distant metastasis was the major cause of failure, but 2 patients died due to unknown failures and 3 of other diseases. The distant metastasis sites were the lung (3 patients), the bone (1 patient), and the liver (2 patients). One patient died of second esophageal cancer. There were no severe late complications, with the exception of 1 osteo-radionecrosis of the mandible 58 months after treatment. Conclusion: Although this study was peformed on small patients group, we considered hypefractionated radiation therapy for the treatment of advanced stage head and neck cancer might improve the disease free survival and decrease the local failure with no increase in late complications despite of the slight Increase in acute complications.

• Radiation Oncology Journal
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• v.15 no.4
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• pp.357-367
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• 1997

Purpose : To identify variable prognostic factors and analyse failure patterns in the uterine cervix cancer after radical operation and adjuvant radio-therapy, a retrospective analysis was undertaken. Materals and Methods : I analysed one hundred and twenty four patients with uterine cervix cancer, FIGO stage IB, IIA and IIB, treated with radical hysterectomy and pelvic lymph node dissection followed by adjuvant radio-therapy between May 1985 and May 1994. Minimum follow up period was 24 months. All of them were treated with full dose external radiotherapy with linear accelerator and/or high dese rate intracavitary radiation. Results : Overall 5 year survival rate and relapse free survival rate were $75.4\%,\;73.5\%$, respectively. Significant prognostic factors by relapse free survival were wall involvement thickness, lymph node location and number, parametrium involvement, tumor size, stage, uterine body involvement, vaginal resection margin involvement. By multivariate analysis, lymph node matastasis. tumor size and vaginal resection margin involvement were significant prognostic factos. Treatment related failure were 33 cases. Locoregional failure were more likely in the stage IIB, lymph node positive or vaginal resection margin positive patients whereas distant failures were relatively more frequent in stage IB, IIA and lymph node, vaginal resection negative patients. In stage IIB, 5 year relapse free survival rate was only $56\%$ and nine of twenty two patients recurred. Conculsion : Postoperative radiotherapy results are good for patients with relatively low risk factor. But the results are poor for patients with multiple, high risk factors or stage IIB. To control recurrence for patients with high risk factors, postoperative adjuvant radiotherapy is not sufficient treatment method. To raise control rate adding other methods such as radiosensitizing agent or chemotherapy is necessary and prospectively randomized study is needed for evaluation of postoperative radiotherapy efficacy and /or other methods. And it is reasonable to treat primary radical radiotherapy for patients with stage IIB cervical cancer instead of radical operation and adjuvant radiotherapy and/or chemotherapy regimen.

• Radiation Oncology Journal
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• v.19 no.1
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• pp.10-15
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• 2001

Purpose : This is a retrospective study to evaluate the results of radiation therapy in nasopharyngeal carcinoma. Materials and Methods : From September 1989 to October 1996, 19 patients with nasopharyngeal carcinoma completed planned radiation therapy course. Stages were 1 in 2 patients, II in 6, III in 2 IV in 9 patients, respectively. Pathology was squamous cell carcinoma in 5 patients, undifferentiated cell carcinoma in 14 patients. Fourteen patients were treated with radiation therapy only. Five patients received chemotherapy. The follow-up period ranged from 5 months to 115 months with a median of 33 months. Follow-up was possible in all patients. Results : Responses to radiation therapy were complete response in 15 patients, partial response in 2, and no response in 2, respectively. Patterns of failure were as follows : locoregional recurrence in 6 patients and distant metastasis in 4 patients. The sites of distant metastasis were bone, liver and lung. Five year survival rate was $47.8\%$ and five year disease free survival rate was $48.1\%$. Stage, T-stage, N-stage, central nervous system involvement, pathology type, performance status, response, radiation dose, chemotherapy were not significant prognostic factors. Conclusion : 5-year survival rate was $47.8\%$ and 5-year disease free survival rate was $48.1\%$. The advances in radiation therapy techniques and chemotherapy are needed.

• Radiation Oncology Journal
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• v.16 no.1
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• pp.63-69
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• 1998

Purpose : This study is to evaluate the efficacy of small bowel displacement system(SBDS) in post-operative pelvic radiation therapy(RT) of rectal cancer patients by measurement of small bowel volume included in the radiation fields receiving therapeutic dose. Materials and Method : Ten consecutive new rectal cancer patients referred to the department of Radiation Oncology of Samsung Medical Center in May of 1997 were included in this study. All patients were asked to drink $Castrographin^(R)$ before simulation and were laid prone for conventional simulation and CT scans with and without SBDS. The volume of opacified small bowel on CT scans, which was to be included in the radiation fields receiving therapeutic dose, was measured using Picture archiving and communication system (PACS). Results : The average small bowel volumes with and without SBDS were 176.0ml(5.2-415.6ml) and 185.1ml(54.5-434.2ml), respectively The changes of small bowel volume with SBDS compared to those without SBDS were more than $10\%$ decrease in three, less than 10% decrease in two, less than $10\%$ increase in three, and more than $10\%$ increase in two patients. Conclusion : No significant advantage of using SBDS in post-operative pelvic RT for rectal cancer patients has been shown by small bowel volume measurement using CT scan considering additional effort and time needed for simulation and treatment setup.

• Korean Journal of Head & Neck Oncology
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• v.26 no.2
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• pp.178-182
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• 2010

서 론 : 두경부암의 예후에 가장 중요한 인자는 진단시 병기와 치료 후 재발의 유무이다. 따라서, 재발 병변을 조기에 발견하는 것이 매우 중요하다. 본 연구에서는 두경부암 환자의 추적 관찰에서 $^{18}F$-FDG PET/CT의 유용성에 대해 알아보고자 하였다. 대상 및 방법 : 2004년 4월부터 2008년 8월까지 고려대 안암병원에서 두경부암으로 치료를 완료한 후 추적관찰이 가능하였던 88 예의 환자를 대상으로 하였다. 환자는 본원의 두경부암 추적관찰 양식에 따라 술 후 6, 12개월째 $^{18}F$-FDG PET/CT를 시행하였으며, 원발부위 및 경부 재발, 원격전이와 중복암의 진단에 있어 $^{18}F$-FDG PET/CT의 민감도, 특이도, 양성예측율, 음성예측율을 평가하였고, 기존의 추적관찰 방법과 이를 비교하였다. 결 과 : 원발부위 재발의 진단에 있어 민감도, 특이도, 양성예측율, 음성예측율은 각각 95%, 97%, 90%, 98% 였다. 경부전이 재발의 진단에 있어서는 각각 94%, 98%, 83%, 99%였으며, 원격전이 및 이차암 진단에 있어서는 94%, 100%, 100%, 99%였다. 원발부위 재발은 고식적인 진단 방법, 원격전이와 이차암은 $^{18}F$-FDG PET/CT가 진단에 의미있게 유리하였다. 결 론 : $^{18}F$-FDG PET/CT는 두경부암의 추적관찰 과정에서 재발 여부를 판정하는데 있어 매우 유용하며, 특히 원격전이 및 이차암의 발견에 있어 유용하다. 그러나, 위양성 및 위음성의 가능성으로 고식적인 진단 방법과 병행해야 진단의 효과를 높힐 것으로 생각된다.

• The Journal of Korean Academy of Prosthodontics
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• v.58 no.4
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• pp.349-355
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• 2020

The use of an obturator prosthesis for patients with maxillary defects is a common treatment method to improve their oral function and achieve esthetic satisfaction. However, due to various difficulties and complexities, conventional methods for fabricating dental obturators continue to pose a challenge for dentists and patients, as well as laboratory technicians. CAD-CAM technologies may make it simple to fabricate maxillofacial prostheses including hollow obturators, which could improve comfort for clinicians by reducing burdensome manipulations. In addition, patients without a specialist in their vicinity will be able to be treated via cooperation between a nearby general practitioner and a distant prosthodontist. The aim of this clinical report is to investigate the possibility of using digitally fabricated maxillofacial prostheses that can be designed in one location, and manufactured in another in clinical situations.