후두학의 역사

정성민,Chung, Sung-Min 대한후두음성언어의학회 2012 대한후두음성언어의학회지 Vol.23 No.1

An understanding of the history of laryngology is both interesting and useful for those in the field so this study attempts to uncover some of the interesting aspects of its history. The oldest reference of laryngology in the Orient is in the medical documents called the "Whangjainaekyung",(황제내경) which was written over a time period between 3000-4000 B.C., and described the laryngeal function of respiration, protection of the airway and phonation. In the West, a drawing that seems to portray a tracheostomy was found in medical tombs in the plains of Saqqara in Egypt. These drawings date from approximately 3600 B.C. A watershed in laryngology occurred when a spanish music professor named Manuel Garcia in first successfully used a mirror to inspect the larynx. Since that time, laryngology has developed relatively quickly and clinical laryngology made it possible by means of a number of favorable developments. Great advances in laryngological diagnosis and treatment has occurred since the 1970s thanks to improvements in technology leading to the introduction of an operating microscope, endoscopes and lasers. Despite our recent advances in laryngology, we still have not achieved uniformly favorable outcomes and there is much that we do not know. Our future promises continued advances in the field of laryngology such as gene therapy to improve wound healing and tissue engineering to allow the recreation of normal mucosa. In this review, I divide the history of the larynx into the past, present and future. In the last section, I described the history of laryngology in Korea briefly.

후두 근전도

정성민,Chung, Sung-Min 대한후두음성언어의학회 2006 대한후두음성언어의학회지 Vol.17 No.1

진단적 후두근전도

정성민,Chung, Sung-Min 대한후두음성언어의학회 2008 대한후두음성언어의학회지 Vol.19 No.2

Diagnostic laryngeal electromyography (LEMG) relatively evaluates the electrophysiologic status of the larynx and provides critical clinical informations that no other tests can provide. However, LEMG is still not widely applied as a routine tool in clinical practice. One reason for this is the technical and interpretative difficulties of LEMG. But if LEMG is performed by a team approach consisting of an otolaryngologist and a neurologist, the technique and the interpretation of LEMG are not difficult to master. Another reason is that there is still not exact standard guideline for clinical application of LEMG. LEMG is an essential diagnostic test in evaluating patients with neuromuscular disorders, particulary vocal fold immobility, reduced mobility of vocal fold. The more we have used LEMG, the more we have found it useful in the evaluation and treatment of voice disorders, and the role of LEMG will be extended.

탈회동결건조골에 혼합한 형질 변형 성장인자($TGF-{\beta}1$)가 골조직 재생에 미치는 영향

정성민,이만섭,박준봉,Chung, Sung-Min,Lee, Man-Sup,Park, Joon-Bong 대한치주과학회 1995 Journal of Periodontal & Implant Science Vol.25 No.2

The purpose of this study was to observe the effect of $TGF-{\beta}1$ on the regeneration of bone in guided bone regeneration. Four adult dogs aged 12 to 24 months were used in this study. Experimental bone defects were created surgically with surgical bur and chisel on the 3th. premolars. In experimental group, bone defect were grafted with DFDB and $TGF-{\beta}1$. In control groups, bone defects were grafted with only DFDB. At 1,2,3 and 4 weeks, dogs were serially sacrificed and specimens were prepared with Hematoxylin-Eosin stain and Goldner's stain for light microsopic evaluation. The results of this study were as follows: 1. The infiltration of inflammatory cells was prominent in control groups at 1, 2 and 3 weeks. 2. The lining of osteoblast was observed at 2 weeks in control group, but at 1 week in experimental group. 3. In both groups, osteoid was formed at 2 weeks. In control groups, osteoid was fromed on only bone surface. but in experimental groups, osteoid were formed on both bone & DFDB surfaces. 4. In only experimental groups, The fusion of new bone & DFDB was only observed at 3 weeks. and the fusion of new bone & DFDG was more prominent at 4 weeks. But in control groups, No fusion of new bone& DFDB was oberved at 3 and 4weeks. From the above result, the $TGF-{\beta}1$ was effective in bone formation and increased inductive effect of DFDB in guided bone regeneration technique. Inductive effect of DFDB was increased with $TGF-{\beta}1$.

치조제의 유지와 수복

정성민,Chung, Sung-Min 대한심미치과학회 1998 Journal of the Korean Academy of Esthetic Dentistr Vol.7 No.1

Alveolar ridge augmentation and preservation techniques designed to reconstruct deformed alveolar ridge now occupy a major role in esthetic dentistry. Previously, deformed alveolar ridges were filled with plastic materials(porcelain or resin) of prosthesis to restore ridge contours, which resulted in larger teeth and food impaction under the pontic base. So, prostheses of this type were unacceptable and really detectable when patients smiled. But nowadays, alveolar ridge augmentation procedures enable the dentists to provide patients with fixed prostheses that are esthetic. The development of guided tissue regeneration technique and materials also have made a major impact on extending the scope of therapeutic horizons in dentistry.

ZigBee 네트워크 키 관리 기법 조사

정성민(Sung-Min Chung),이정준(Jung-June Lee),정영교(Young-Gyo Jung),윤희용(Hee-Yong Youn) 한국컴퓨터정보학회 2016 한국컴퓨터정보학회 학술발표논문집 Vol.24 No.1

RSSI와 LQI를 이용한 무선 센서 네트워크에서의 실내 위치추정 기법 연구

정성민(Sung-Min Chung),김경태(Kyung-Tae Kim),이정준(Jung-June Lee),윤희용(Hee-Yong Youn) 한국컴퓨터정보학회 2016 한국컴퓨터정보학회 학술발표논문집 Vol.24 No.1

SSD 적중률 향상을 위한 PSO 기반 버퍼 관리 기법 연구

정성민(Sung-Min Chung),송준석(Jun-Seok Song),송병후(Byung-Hoo Song),윤희용(Hee-Yong Youn) 한국컴퓨터정보학회 2016 한국컴퓨터정보학회 학술발표논문집 Vol.24 No.1

CT Head angiography 영상 재구성 시 ROI 변화에 따른 화질 비교 및 평가

정성민(Sung Min Chung),강한솔(Han Sol Kang) 대한CT영상기술학회 2015 대한CT영상기술학회지 Vol.17 No.1

목적 : CT head angiography 검사 시 Region of interest(ROI) 설정 위치의 변화를 통해 불필요한 정맥상을 제외시켜 영상 재구성 시 효율성 증가와 유용성을 알아보고자 하였다. 대상 및 방법 : CT head angiography 검사를 시행 한 30명의 환자를 대상으로 하였고 그 중 뇌종양과 동정맥 기형환자는 제외하였다. Somatom Definition AS 64 MDCT(Siemens) 장비로 검사하였고 영상 재구성에는 Workstation Wizard(Siemens)를 이용하였다. 검사 방법으로는 조영제 60ml와 중외생리식염수 40ml를 사용하였고, CCA(Common carotid artery)와 AA(Ascending aorta)에 각각 ROI를 설정하여 검사 하였고 정맥상 확인을 위해 SSS(Suprerior Sagittal Sinus)와 ICA(Internal carotid artery)의 CT number를 측정하여 두 값의 차이를 비교 분석하였다. 결과 : CCA에 ROI를 설정한 검사에서 SSS의 CT number는 최소 201 HU, 최대 489 HU로 평균 292 HU로 측정 되었고, ICA의 CT number는 최소 205 HU, 최대 458 HU로 평균 350 HU로 측정 되었다. AA에 ROI를 설정한 경우 SSS의 CT number는 최소 81 HU, 최대 173 HU로 평균 126 HU로 측정되었고, ICA의 CT number는 최소 258 HU, 최대 418 HU로 평균 338 HU로 측정되었다. AA에 ROI를 설정한 검사는 CCA에 ROI를 설정했을 때의 검사보다 SSS의 CT number가 57%로 감소 되었고 ICA의 CT number는 0.04%의 감소율을 나타냈다.. 결론 : 각각의 ROI 위치 변화에 따른 영상을 비교 분석한 결과 ROI를 CCA에 설정했을 때의 검사보다 AA에 설정하여 검사하는 것이 불필요한 정맥상을 보다 효율적으로 배제시켜 재구성 작업과 임상적 활용에 있어 우수함을 확인하였다. Purpose : To evaluate efficiency of Computed tomographic angiography(CTA) image in reconstruction processing throughout changing places of Region of interest(ROI). Materials and Methods : Data from 30 patients who take CT head angiography examination is used on this study except patients with brain tumor and AVM. All examinations were performed by using Somatom Definition AS 64channel MDCT(Siemens Healthcare, Germany) and Workstation Wizard(Siemens Healthcare, Germany) was used for image reconstruction. Each ROI in head angiography examination is placed CCA and AA. To check the venous phase, CT number of SSS and ICA were measured for comparison analysis. Results : Average CT number of SSS was 292 HU and ICA was 350 HU when setting on the ROI on CCA. The other side, CT number of SSS was 126 HU and ICA was 338 HU when ROI is on AA. Setting the ROI on AA reduced CT number of SSS by 57% and CT number of ICA by 0.04% compared with the ROI on CCA. Conclusion : Setting the ROI on AA is more reduced unnecessary venous phase than the ROI on CCA. So that it can make reconstruction process more convenient and clinically useful.

Hemorrhage 환자에 있어서 Dual-Energy Computed Tomography를 이용한 Head Angiography 검사의 유용성

정성민(Sung Min Chung),김혜진(Hye Jin Kim) 대한CT영상기술학회 2010 대한CT영상기술학회지 Vol.12 No.2

Purpose To estimate the availability of dual energy computed tomography(DECT) for the patients who had been underwent head angiography because of bleeding with the image(virtual non-contrast, VNC, 50% mixed image, overlay view) that was obtained by readjusting of iodine concentration at dual-energy processing and volume rendering image. Materials and methods The subjects were 40 patients who had hemorrhage or were suspected to have hemorrhage and took head angiography with DECT in our hospital from April 2009 to January 2010. The method was that we implemented the monitoring scan and set the interest area at aortic arch and made the scanning to be started automatically when Hounsfield unit reached to 100 using by auto bolus triggering. 60 ml of contrast medium was injected at the speed of 4 ml/sec and another 60 ml was injected at the speed of 2.5 ml/sec and 30 ml of saline was added at the speed of 2.5 cc/sec. The estimation was done with computed tomographic angiography(CTA) volume rendering images took from 3D reconstruction process and 2D mapping images(VNC 50% mixed image) took from dual console. Results We had 9 patients of Vascular lesion which was 25.5%, 16 patients of tumor lesion which was 40%, 8 patients of simple hemorrhage which was 20%, 4 patients who didn’t have hemorrhage which was 10%, 2 patients of tauma which was 5%, and 1 patient of hemorrhage caused by uncertain reason which was 2.5%. Conclusion It was concluded that the estimating the reason of hemorrhage using by both volume rendering image in bead angiography by dual energy and 2D mappiing image acquired through dual console can be an useful diagnosis to choose additional examinations and make a decision the direction of the treatment.