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박희진,이성문,이소연,손은석,정은철,노명호,이선주 대한영상의학회 2015 Korean Journal of Radiology Vol.16 No.6
We described the technique of ultrasound (US)-guided percutaneous removal of the foreign bodies (FB) with hydro-dissection in the radiologic department and presented video files of several cases. Four patients referred to the radiology department for US evaluation and US-guided percutaneous removal of the FBs in the upper and lower extremities between November, 2006 and November, 2013 were included in this study. The procedures started with US evaluation for the exact location and shape of the FB. A 5 mm-sized skin incision was made at the site of the nearest point from the FB where no passing arteries or tendons were present. We adopted a hydrodissection technique to separate the FB from adjacent tissue using a 2% lidocaine solution. Injected anesthetics detached the FBs from surrounding tissue and thereby facilitated removal. After the tip of the mosquito forceps reached the FB, the wooden FBs were removed. The mean time required for the entire procedure was approximately 20 minutes. There were no significant complications during the US-guided removal or long-term complications after the procedure. All 4 FBs were successfully removed from the soft tissue under US guidance. Ultrasound-guided percutaneous removal of the FBs with hydro-dissection in the radiology department is a less invasive and safe method over surgical removal in the operating room. Additionally, the use of a guide wire and serial dilator may help minimize soft tissue injury and facilitate the introduction of forceps.
박희진,공동욱,손병락,이동하,Park, Hee-Jin,Kong, Dong-Uck,Son, Byung-Rak,Lee, Dong-Ha 한국태양에너지학회 2012 한국태양에너지학회 논문집 Vol.32 No.suppl3
In the recent research technical solutions have been studied to integrate renewable energy into unmanned aerial vehicles to use it as the main power source. As the weight of the aerial vehicle body is essential for its performance, we consider to use light-weight solar cell technology. Furthermore fuel cells are also integrated create a highly energy-efficient aerial robot. In this paper, construction concept and software design of the tilt-rotor aerial vehicle GAORI is introduced which uses solar cells and fuel cells as power source. The future work direction and prognosis are discussed.
Ultrasonographic Findings of Subcutaneous and Muscular Sparganosis
박희진,박노혁,박찬섭,이성문,박성일,이은자 대한영상의학회 2009 대한영상의학회지 Vol.61 No.3
Purpose: This study was deigned to evaluate the ultrasonographic findings of subcutaneous and intramuscular sparganosis. Materials and Methods: Nine cases of histologically proven subcutaneous and intramuscular sparganosis lesions in seven patients (mean patient age, 59 years; M:F = 6:1) were reviewed retrospectively. Two patients had recurrent sparganosis. A color Doppler examination was performed in all cases. Results: A prior history of ingestion of raw snake meat was noted for two patients. Patients presented with a palpable mass and induration (n = 7) and dull pain (n = 4). Lesion locations were in the thigh (n = 4), lower leg (n = 2), chest wall (n = 1), an inguinal location (n = 1) and the neck (n = 1). Five lesions were in the subcutaneous fat layer and four lesions had intramuscular locations. Calcification was noted in two cases. All cases showed heterogeneous hypoechoic serpiginous tubular-and-oval lesions. The lesions were conglomerated or discrete in appearance. All nine cases showed the presence of lesions with a multi-layered wall with variable intraluminal echogenicity, at least in one segment of the lesion. Increased vascularity was noted on color Doppler examinations in two patients with pain. Conclusion: Subcutaneous or intramuscular sparganosis should be included in the differential diagnosis when a serpiginous tubular-and-oval lesion is noted that is seen with a multi-layered wall with variable intraluminal echogenicity.
악성 위암 때문에 발생한 식도 협착 환자에서 피복형 Nitinol Stent 삽입술 후 발생한 스텐트 파손: 1예 보고
박희진,조윤구,김완태 대한영상의학회 2008 대한영상의학회지 Vol.59 No.5
자가 팽창형 식도 스텐트 삽입술은 악성 식도 협착에 대한 대증적 치료법으로 널리 사용되고 있다. 이 시술은 쉽고 안전하며 효과적인 방법으로 알려졌지만, 종양의 내관으로의 성장(tumor ingrowth)이나 스텐트의 위치이동(stent migration)과 같은 여러 합병증이 보고되어 있다. 그러나 금속 스텐트의 파손과 관련된 보고는 매우 드물며 특히 Nitinol 스텐트에 관해서는 더욱 드물다. 저자들은 악성 식도 협착에서 피복형 Nitinol 스텐트 삽입술 시행 후 발생한 위치 이동과 동반된 스텐트 파손 1예를 보고한다. 이 스텐트 파손은 스텐트가 장기간 위액에 노출되면서 스텐트에 화학적 침식(erosion)이 일어나 스텐트 손상을 일으켰을 것으로 추정한다.