• Journal of Radiation Protection and Research
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• v.12 no.2
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• pp.1-8
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• 1987

The relative biological effectiveness has been measured for the biological characterization of $p^+(50.5\;MeV)$ Be neutron of KCCH-Cyclotron prior to clinical application. Measured RBE of mouse jejunal crypt cell in single whole body irradiation was 2.8. This RBE value is changed differently in different biologic systems such as mouse jejunal crypt cells, intestine and bone marrow in different irradiation method, so that in fractionated irradiation RBE is variable to the different fraction size and total dose, and also variable to the number of fractions.

• Korean Journal of Head & Neck Oncology
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• v.5 no.1
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• pp.31-38
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• 1989

The result of neutron therapy on head and neck cancer using KCCH -Cyclotron neutron which had been using from October 1986 to September 1989 in the Korea Cancer Center Hospital. Among the total of 27 patients the cases of malignant salivary gland tumor were 14 and the cases of advanced head and neck cancer of AJCC stage IV were 13. The local control rate was 80% in malignant salivary gland tumor and 46.2% in advanced head and neck cancer. The 2 year survival rate was 60% in malignant salivary gland tumor and 38.5% in advanced head and neck cancer. Although there was no significant difference in prognosis according to the pathologic types, squamous cell carcinoma revealed a pattern of poor prognosis. The major complication from the neutron therapy had developed 7.1% in malignant salivary gland tumor and 23.1% in advanced head and neck cancer. In conclusion, neutron therapy is superior in the treatment of malignant salivary gland tumor and also effective in the treatment of advanced head and neck cancer when it can avoid to treat some site of low tolerance.

• Radiation Oncology Journal
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• v.3 no.2
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• pp.175-178
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• 1985

Even though the mechanism and the nature of radiation induced pneumonitis, esophagitis and gastroenteritis were detailed by many authors, complicated secondary infection is still serious problem, sometimes fatal, even today. We experience a case of multiple pyogenic abscess in subcutaneous tissue of the back and both kidneys which could not differenciate from multiple metastatic sarcoma grossly, and report with review of literatures, lab findings.

• Radiation Oncology Journal
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• v.13 no.1
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• pp.63-67
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• 1995

A retrospective study was carried out of 20 patients with histologically proven invasive carcinoma of the vagina from 1979 to 1993; 17 cases with curative primary radiotherapy and three cases with postoperative radiotherapy. The five and ten year overall survival rates were $79\%$ and $53\%$, respectively. Survival was strongly correlated with stage. Five year survival rates of stage I, stage II, and stage III, IV were $100\%$, $78\%$, and $0\%$, respectively. Eight patients experienced recurrences: five within the irradiated volume, two distant metastasis, and one combined both local and distant metastasis. There was no significant late complication. From these data, radiation is effective in the management of the vaginal cancer patients and optimum treatment modality and total dose recommendation are made.

• Radiation Oncology Journal
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• v.10 no.2
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• pp.163-169
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• 1992

A retrospective analysis was performed on 53 patients with brain malignant astrocytoma and glioblastoma multiforme treated with surgical resection and postoperative radiotherapy in the period between January 1980 and June 1991. There were 13 patients with malignant astrocytoma, 40 patients with glioblastoma multiforme. Survival rates were analyzed according to histologic grade, age, performance status, extent of surgical resection, tumor location, symptom duration, total radiation dose and addition of chemo­therapy after radiation therapy. 5 year actuarial survival rate for malignant astrocytoma was $29.4\%$, for glioblastoma multiforme was $2.8\%$. Histologic grade, age, performance status, total radiation dose were statistitically significant prognostic factors.

• Radiation Oncology Journal
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• v.6 no.2
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• pp.163-168
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• 1988

A retrospective analysis was performed on 49 patients with astrocytoma or gliobiastoma multiforme of brain who received postoperative radiotherapy in the period between February 1979 and December 1985 Fourteen patients had grade 1 astrocytoma, 11 patients grade II, 14 patients grade III, and 10 patients glioblastoma multiforme. Three year actuarial survival rates were $85.7\%,\;44.0\%\;and\;23.1\%$ for grade I, II, and III astrocytomas, respectively. One and 2 year actuarial survival rates for patients with glioblastoma multiforme were $54.5\%\;and\;27.3\%$, respectively. Histologic grade, age, extent of operation and tumor location were revealed to be prognosticators.

• Journal of Yeungnam Medical Science
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• v.14 no.2
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• pp.443-450
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• 1997

전신적인 침범없이 후두에만 국한되는 악성 림프종은 매우 드믄 예로서 일반적으로 두경부에만 국한된 방사선 치료로 근치 가능하다. 그러나 때때로 급성 호흡 곤란을 초래하여 응급 기관 절개와 복합 항암제를 투여해야 되는 경우를 간혹 경험하게 된다. 본 증례는 수 개월간 지속되어온 애성과 최근에 갑자기 심해진 호흡 곤란으로 급성 후두염이란 임상 진단명으로 보존적인 치료를 하였으나 증상이 호전되지 않아서 후두조직 검사 결과에서 비 호즈킨 림프종으로 확진되어 6회의 복합 항암제를 투여한 다음 남아있는 병변에 대한 45 Gy의 외부 방사선 치료후 촬영한 전산화 단층 촬영에서 완전 관해를 보였으며 진단후 10개월이 지난 현재 무병 상태를 보이는 환자를 경험하였기에 간단한 문헌 고찰과 함께 보고한다.

• Asian Pacific Journal of Cancer Prevention
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• v.14 no.12
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• pp.7743-7748
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• 2013

Background: To study the pattern of patient load, personnel and equipment resources from 30-years experience in Southern Thailand. Materials and Methods: This retrospective study collected secondary data from the Division of Therapeutic Radiology and Oncology and the Songklanagarind Hospital Tumor Registry database, Faculty of Medicine, Prince of Songkla University, during the period of 1982-2012. Results: The number of new patients who had radiation treatment gradually increased from 121 in 1982 to 2,178 in 2011. Shortages of all kinds of personnel were demonstrated as compared to the recommendations, especially in radiotherapy technicians. In 2011, Southern Thailand, with two radiotherapy centers, had 0.44 megavoltage radiotherapy machines (cobalt or linear accelerator) per million of population. This number is suboptimal, but could be managed cost-effectively by prolonging machine operating times during personnel shortages. Conclusions: This study identified a discrepancy between workload and resources in one medical school radiotherapy center in Southern Thailand. This information is crucial for future strategic planning both regionally and nationally.

• Journal of Radiation Protection and Research
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• v.14 no.2
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• pp.45-50
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• 1989

Radiation exposure of the personnel in the neutron therapy facility of KCCH cyclotron neutron system is discussed. In neutron therapy room, medical personnel is exposed to photons of the remanent induced radioactivity from the isocentric gantry in which targets and collimators are mounted. The radiation level of the neutron therapy room of KCCH cyclotron was acceptable and it decreased immediately after beam off. Personal exposure measured by individual monitor was far less than permissible level.

• Radiation Oncology Journal
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• v.11 no.1
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• pp.183-191
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• 1993

The homogeneous dose planning is one of the most important roles in radiation therapy. But, it is not easy to obtain a homogeneous dose to paranasal sinus region including the ethmoidal sinus with conventional irradiation techniques. In this experimental study, the authors tried to get a homogeneous dose at PNS region, but the nasal cartirage does not exceed the tolerance dose, with anterior-posterior beam and two both lateral wedged beams. Used three fields were shielded with full thickness of blocks to preserve the eye-balls and with blocks of one half value layer to create a homogeneous dose at the whole treatment volume. The dose computations are based on the three dimensonal structure with modified scatter contributions of partial shielders and attenuated beams in 6 MV photon beams. The dose distributions of mid-plane is examined with Kodak verification films and teflon-embedded TLD rod (1 mm diameter and 6 mm length) to confirm the computed dose. In our study, the whole PNS regions have shown within $85{\%}$ of the resultant isodose curves with relatively homogeneous dose distribution. The results of dose computation and measurements are agree well within $5{\%}$ uncertainties.