• Journal of The Korean Radiological Technologist Association
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• v.29 no.1
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• pp.221-221
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• 2003

• Proceedings of the Korean Vacuum Society Conference
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• 2010.02a
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• pp.104-104
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• 2010

최근 나노 입자가 항체와 호환이 가능하다는 연구가 진행됨에 따라, 외부에서 나노 입자를 비침투식으로 가열할 수 있다면 암세포만을 선택적으로 치료할 수 있기에, 본 연구는 유도결합 고주파 가열 메커니즘을 이용하여 암세포를 제거할 수 있는 새로운 방법에 관한 내용을 다루고 있다. 13.56 MHz의 고주파를 인가하였으며, 카본나노튜브 용액을 유도 결합 고주파 가열시킨 후 용액의 온도 상승 값을 측정하였다. 또한, 인체와 호환이 가능하도록 제조된 특수용액을 이용하여 유도 결합 고주파 가열 실험을 하였으며, 그에 따른 온도 증가를 측정하였다. 용액의 온도는 농도가 짙고, 고주파 전력이 높으며, 그리고 인가 시간이 길수록 온도 상승이 급격해짐이 관찰되었으며, 이러한 온도 상승은 유도 가열에 의한 에너지 전달이 효과적임을 나타낸다. 따라서 이 유도 결합 고주파 가열법은 비침투식, 선택적 암세포 치료에 적용이 가능할 것으로 예상된다.

• The Journal of the Korea institute of electronic communication sciences
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• v.18 no.6
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• pp.1337-1344
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• 2023

We aim to find out the effectiveness of performance evaluation to ensure safety of performance through development of high-frequency electrode probes, evaluation test protocol and evaluation simulator that is essential to ensure safety in performance evaluation and reliability evaluation of high-frequency electrode probes for underwater therapy used with high-frequency electrosurgical equipment.

• Journal of radiological science and technology
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• v.38 no.2
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• pp.155-161
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• 2015

This study confirmed the correlation between the change of the cooling water in internal cooling system and the size of the ablation site of bovine liver in RF heat treatment equipment. The bovine liver was resection with $4{\times}4{\times}4cm^3$ in 2cm cool-tip and with $6{\times}6{\times}6cm^3$ in 3cm cool-tip for the experiments. Area and perimeter of the ablation site for bovine liver were measured by Freehand techniques of MRI. It showed area and perimeter decreased during cool-tip temperature rises 6 and 12 minutes ablation using a 2cm and 3cm cool-tip. The correlation of cool-tip temperature and area and perimeter was statistically significant the result are shown(p=.000). The measurements of area and perimeter were more accurate with MRI in actual measurements and MRI for ablation range. The statistical results using Paired sample T-test was also significant(p=.038). The ablation range of bovine liver decreased according as cooling water temperature increases in RF heat treatment equipment for reason of carbonization occurred due to does not accurately pass the RF energy. Therefore, it is considered the effect of RF heat treatment would be increased if the temperature of the cooling water consistently maintain the low temperature in order to reduce the generation of carbide at RF heat treatment and RF energy is delivered accurately.

• 전기의세계
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• v.34 no.9
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• pp.566-571
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• 1985

암치료는 금세기 의료영역에서 가장 큰 과제중의 하나이며, 우리 일상생활에서도 이를 피부로 느낄 수 있는 중요한 것이다. Hyperthermia system은 비단 암치료 뿐만 아니라 동상, 신경통 등 심재성 물리치료에도 좋은 효과를 가져오리라 본다. 2000년 까지는 암이 정복되리라고 예상들을 한다. 유전적인, 생화학적인 치료시스템 이외에도 이 hyperthermiz system은 중요한 역할을 하리라 믿는다. 한편, 의료 시스템의 많은 부분이 전기 전자적인 요소를 포함하고 있으므로 의료에 종사하는 사람들도 전기 전자공학자의 필요성을 점점 피부로 느끼어가고 있다. 비단 이 고주파 가온시스템 뿐만 아니라, 여러 의료장비에 관해서 우리가 조금만 신경을 써서 의학자들과 협조하여 연구를 할 수만 있다며는 좋은 의료시스템을 많이 개발할 수 있으리라 본다.

• Journal of Chest Surgery
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• v.43 no.6
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• pp.635-641
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• 2010

Background: Radiofrequency endovenous ablation of incompetent saphenous vein has gaining popularity over the conventional ligation and stripping as a minimally invasive technique. The latest version of radiofrequency endovenous catheter, $VNUS^{\circledR}Colosure$ fast VNUS medical Technologies, San Jose, CA, adopted a segmental ablation system, instead of continous pullback, is designed to reduce treatment time in comparison with the previous model $VNUS^{\circledR}Colosure$ plus VNUS medical Technologies, San Jose, CA. The purpose of this study is to compare the difference between two endovenous radiofrequency ablation systems in terms of treatment efficacy and complication rates. We analyze the initial efficacy and complication rates of $VNUS^{\circledR}Colosure$ fast with $VNUS^{\circledR}Colosure$ plus. Material and Method: Between June 2006 and August 2009, $VNUS^{\circledR}Colosure$ plus was performed to treat varicose vein on 59 limbs in 41. patients and $VNUS^{\circledR}Colosure$ fast was performed on 76 limbs in 67 patients. We retrospectively compared in both group with sex, mean treatment time, mean treatment diameter, conjugated treatment, and complications after the procedure. Result: All patient were symptomatic and diagnosed as varicose vein and underwent level 2 clinical classification with color duplex scan. The mean treatment time for the great saphenous vein was significantly less with $VNUS^{\circledR}Colosure$ fast ($17.0{\pm}6.5min$) than $VNUS^{\circledR}Colosure$ plus ($62.7{\pm}9.8min$). There was no significant difference in 1 yr closure rate between groups (p=0.32). Minor complications such as skin burn, thrombophlebitis, ecchymosis, hematoma, cellulitis, tenderness, and there were not different between the groups. Conclusion: Both $VNUS^{\circledR}Colosure$ fast and $VNUS^{\circledR}Colosure$ plus are effective methods of endovenous saphenous ablation. $VNUS^{\circledR}Colosure$ fast is superior to the previous model with less treatment time preserving compatible efficacy and complications. The efficacy of $VNUS^{\circledR}Colosure$ fast for long term closure rate remains to be established.

• Journal of the Korea Convergence Society
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• v.9 no.2
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• pp.289-294
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• 2018

A test study was conducted to identify the effects of diathermy through therapist's hand on patients with chronic lumbar pain. The study assessed the effectiveness of Winback High Frequency TECAR Therapy on 21 patients suffering from chronic lumbar pain and the testing was held at H Hospital and began in April 2016 and concluded in September 2016. Assessment of pain relief was through a Visual Analogue Scale (VAS) and the Oswestry Disability Questionnaire (ODQ). The results showed a VAS score decrease from $6.67{\pm}1.76$ to $5.52{\pm}2.03$ (p<0.05) and the ODQ results also showed an decrease from $41.19{\pm}2.56$ to $35.14{\pm}5.11$ (p<0.05). Both of these results are indicative of the positive effects that diathermy through therapist's hand has in the treatment of chronic pain, and the necessity for further studies in this field.

• Journal of rehabilitation welfare engineering & assistive technology
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• v.4 no.1
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• pp.35-41
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• 2010

By the development of medical devices, high-frequency medical devices are becoming widely used. Imaging diagnosis in hospital and clean treatment by high-frequency medical devices and cancer treatment through high-frequency heaters around us, all serve as the examples. However, it still lacks the measures to the problems of the RF(Radio Frequency) mutual interference between the high-frequency devices. In order to prevent the problematic factors for technical and industrial development, a new reasonable and suitable test method is required. In this paper, we study a standard test method for EMC evaluation to solve the RF mutual interference.

• Journal of Gastric Cancer
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• v.9 no.1
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• pp.10-13
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• 2009

The prognosis of gastric cancer with hepatic metastasis is very poor, even though several treatment modalities exist, such as surgical resection. Indeed, a standard therapy has not been established in such patients. Recently, attempts were made to treat hepatic metastasis of gastric cancer with radiofrequency (RF), which was originally used in primary or metastatic liver cancer. RF has been reported to show similar survival compared to surgical resection and is emerging as a new treatment modality even though it is still not conclusive with respect to efficacy and safety due to the paucity of reports. A prospective study is warranted to evaluate the efficacy of RF in the treatment of gastric cancer with hepatic metastasis compared with conventional modalities.

• The Journal of the Korean bone and joint tumor society
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• v.9 no.1
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• pp.84-92
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• 2003

Purpose: To report two cases of bone tumors other than osteoid osteoma in the proximal femur and treated with percutaneous high frequency radioablation method. Cases: We reviewed two cases with intracortical chondroma and enchondroma in the femoral head retrospectively. The patient with intracortical chondroma was a thirty one year old woman and had suffered right hip pain of 1 year duration. The lesion was located in the head of right femur and treated with CT guided percutaneous high frequency radioablation after needle biopsy under general anesthesia. The symptom was gone immediately after the procedure and was discharged postop. 1 day. 15 months has passed without symptom recurrence. Second case having enchondroma, was 56 year old woman complaining of gluteal area pain for 3 months. Radiologic evaluation showed osteolytic lesion with sclerotic rim on the inferior portion of the left femoral head. She received a same therapy with CT guided radiofrequency ablation following needle biopsy. She reported dramatic pain relief after the procedure and was discharged postop. 1 day. No symptom has occurred for 3 months until now. Conclusion: We present 2 cases of bone tumor occurred in the hip joint area other than osteoid osteoma which were treated with CT guided radiofrequency ablation.