매복 정중치의 진단영상분석

노정준,최보람,정환석,허경회,이원진,허민석,이삼선,최순철,Noh, Jeong-Jun,Choi, Bo-Ram,Jeong, Hwan-Seok,Huh, Kyung-Hoe,Yi, Won-Jin,Heo, Min-Suk,Lee, Sam-Sun,Choi, Soon-Chul 대한영상치의학회 2010 Imaging Science in Dentistry Vol.40 No.2

Purpose : The research was performed to predict the three dimensional relationship between the impacted mesiodens and the maxillary central incisors and the proximity with the anatomic structures by comparing their panoramic images with the CT images. Materials and Methods : Among the patients visiting Seoul National University Dental Hospital from April 2003 to July 2007, those with mesiodens were selected (154 mesiodens of 120 patients). The numbers, shapes, orientation and positional relationship of mesiodens with maxillary central incisors were investigated in the panoramic images. The proximity with the anatomical structures and complications were investigated in the CT images as well. Results : The sex ratio (M : F) was 2.28 : 1 and the mean number of mesiodens per one patient was 1.28. Conical shape was 84.4% and inverted orientation was 51.9%. There were more cases of anatomical structures encroachment, especially on the nasal floor and nasopalatine duct, when the mesiodens was not superimposed with the central incisor. There were, however, many cases of the nasopalatine duct encroachment when the mesiodens was superimpoised with the apical 1/3 of central incisor (52.6%). Delayed eruption (55.6%), crown rotation (66.7%) and crown resorption (100%) were observed when the mesiodens was superimposed with the crown of the central incisor. Conclusion : It is possible to predict three dimensional relationship between the impacted mesiodens and the maxillary central incisors in the panoramic images, but more details should be confirmed by the CT images when necessary.

졸-겔법에 의한 유,무기 TiO2-SiO2 혼성(Hybrid)코팅재료의 제조 및 부식 특성 평가

노정준 ( J. J. Noh ),맹완영 ( W. Y. Maeng ) 한국부식방식학회(구 한국부식학회) 2015 Corrosion Science and Technology Vol.14 No.2

Single TiO2 coating prepared by sol-gel process usually experiences cracks in coating layer. In order to prevent cracks, an inorganic-organic hybrid TiO2-SiO2 coating was synthesized by combining precursors with an organic functional group. Five different coatings with various ratios of (1:8, 1:4, 1:1, 1:0.25 and 1:0.125) titanium alkoxide (TBOT, Tetrabutylorthotitanate) to organo-alkoxysilane (MAPTS, γ-Methacryloxy propyltrimethoxysilane) on carbon steel substrate were made by sol-gel dip coating. The prepared coatings were analyzed to study the coating properties (surface crack, thickness, composition) by scanning electron microscope (SEM), focused ion beam (FIB), and Fourier transform infrared spectroscopy (FT-IR). Potentiodynamic polarization tests and electrochemical impedance spectroscopy (EIS) were also performed to evaluate the corrosion characteristics of the coatings. Crack free TiO2-SiO2 hybrid coatings were prepared with the optimization of the ratio of TBOT to MAPTS. The corrosion rates were significantly decreased in the coatings for the optimized precursor ratio without cracks.

구조-음향 전달함수를 통한 구조물의 방사 소음 예측

노정준(Jeong-Joon Roh),정운창(Un-Chang Jeong),김진수(Jin-Su Kim),이선훈(Sun-Hun Lee),오재응(Jae-Eung Oh) 한국소음진동공학회 2014 한국소음진동공학회 학술대회논문집 Vol.2014 No.4

외국의 전자화폐 도입현황과 시사점

정준노 한국정보기술응용학회 2002 한국정보기술응용학회학술대회 Vol.2002 No.1

영상인식 기반 성별, 연령대 추정 연구

노정민(J. M. Noh),김주현(J. H. Kim),김다영(D. Y. Kim),김정준(J. J. Kim),김민규(M. G. Kim) Korean Society for Precision Engineering 2021 한국정밀공학회 학술발표대회 논문집 Vol.2021 No.11월

최근 소비자 분석을 통한 맞춤형 콘텐츠 제공에 대한 연구가 활발히 진행되고 있다. 이러한 맞춤형 콘텐츠를 전시관에서 적용하기 위해서는 특정 전시물이나 디자인에 대한 성별 및 연령대 정보 수집이 필요하며 현재 정보의 수집을 위해서는 설문을 통하여 사용자가 직접 정보를 제공하는 방법이 사용되지만 정보 수집과 가공이 번거롭고 설문자의 적극적인 참여가 필요하기 때문에 자동으로 통계자료를 획득할 수 있는 알고리즘이 요구 된다. 본 연구는 특정 전시물에 대한 관람객의 성별 및 연령대별 관심도 분석을 위하여 합성곱 신경망을 적용한 영상 기반의 성별, 연령대 추정 알고리즘을 연구하였다. 알고리즘은 YOLO v4 기반의 검출 알고리즘을 적용하여 우선적으로 관람객의 전체 이미지로부터 얼굴 이미지를 검출한 뒤, 검출한 이미지를 식별 신경망에 적용하여 성별과 연령대 추정이 가능하게 하였다. 식별에 사용된 EfficientNet 신경망 모델의 학습을 위하여 AI Hub 의 오픈 소스 데이터 중 한국인 감정인식 데이터 셋으로부터 얻은 18,967 장의 이미지 데이터 셋을 구성하였고 K-fold Cross Validation 기법을 적용하여 전체 알고리즘을 실험 및 검증하였다. 본 개발 알고리즘을 기반으로 향후에는 특정 전시물에 대한 관람객의 성별 및 연령대별 관심도 분석을 위한 추가적인 실증 연구를 수행할 예정이다.

수술 후 방사선 단독 치료를 시행한 원발성 척수 종자세포종 1예

정준원 ( Joon Won Jeong ),노상영 ( Sang Young Roh ),양지현 ( Ji Hyun Yang ),노상미 ( Sang Mi Ro ),이정의 ( Junguee Lee ),김인호 ( In-ho Kim ) 대한내과학회 2018 대한내과학회지 Vol.93 No.4

원발성 척수 종자세포종은 매우 드물게 발생하는 질환으로 국내에서는 아직까지 문헌상으로 보고된 증례가 매우 드물기에, 저자들의 병원에서 발견된 예를 경험하고 보고하는 바이다. 영상 검사만으로는 감별진단이 어려울 수 있으므로 조직학적 검사가 거의 항상 요구되며, 조직 소견에서 융합세포영양막성 거대세포의 존재 유무는 질병의 경과 및 재발을 예측하게 해주는 중요한 지표이므로 이를 반드시 확인하는 과정이 필요하다. 수술적 치료 후에는 방사선 치료나 항암치료를 시행할 수가 있으나 종자세포종은 일반적으로 방사선 치료에 좋은 반응율을 보이므로, 본 증례에서는 수술적으로 완전절제 후 방사선 치료를 시행함으로써 현재까지 재발의 소견이 없는 상태이다. A 32-year old male came to our hospital with chief complaint of paraplegia. He had symptom of radiating pain to right leg 3 months ago before paraplegic symptom appeared. Magnetic resonance (MR) imaging from outside hospital showed intramedullary mass involving from T8 to T10 level of spinal cord. According to the imaging result, tumor removal with total laminectomy was performed between T8 and T10 level in our hospital. Pathologic result was compatible with germinoma. Spine radiation (39.6 Gy/22 fx) from T7 to T12 level without chemotherapy was performed 3 weeks later since tumor removal. Follow-up MR imaging showed no recurrence without any distant metastasis. And our patient’s neurologic symptom had been improved. According to this case, postoperative radiotherapy is thought to be effective to primary spinal germinoma. (Korean J Med 2018;93:404-408)

Comparison of Outcomes between Direct-to-Implant Breast Reconstruction Following Nipple-Sparing Mastectomy through Inframammary Fold Incision versus Noninframammary Fold Incision

노태석,김재윤,정복기,정준,안성귀,김영석 한국유방암학회 2018 Journal of breast cancer Vol.21 No.2

Purpose: In properly selected patients with breast cancer, nipplesparing mastectomy (NSM) is generally considered safe by oncologic standards. We examined two groups of patients who underwent direct-to-implant (DTI) reconstruction after NSM, comparing complications encountered, revision rates, and aesthetic outcomes. The patients were stratified based on type of surgical incision and assigned to inframammary fold (IMF) and non-IMF groups. Methods: We investigated 141 patients (145 breasts) subjected to NSM and immediate DTI reconstruction between 2013 and 2016. A total of 62 breasts (in 58 patients) were surgically removed via IMF incisions, with the other 83 breasts (in 83 patients) removed by non-IMF means. Results: Complications associated with IMF (n=62) and non-IMF (n=83) incisions were as follows: skin necrosis (IMF, 9; non-IMF, 18); hematoma (IMF, 3; non-IMF, 4); seroma (IMF, 8; non-IMF, 4); mild capsular contracture (IMF, 4; non-IMF, 7); and tumor recurrence (IMF, 2; non-IMF, 8). Surgical revisions were counted as duplicates (IMF, 18; non-IMF, 38). Aesthetic outcomes following IMF incisions were rated as very good (44.2%), good (23.1%), fair (23.1%), or poor (9.6%). Conclusion: IMF incision enables complete preservation of the nipple-areolar complex, yielding superior aesthetic results in immediate DTI breast reconstruction after NSM. The nature of incision used had no significant impact on postoperative complications or reoperation rates and had comparable oncologic safety to that of non-IMF incisions. IMF incisions produced the least visible scarring and did not affect breast shape. Most patients were satisfied with the aesthetic outcomes.

A U-shaped Association between Body Mass Index and Psychological Distress on the Multiphasic Personality Inventory: Retrospective Cross-sectional Analysis of 19-year-old Men in Korea

김태현,김정준,김미연,김신경,노성원,서정석 대한의학회 2015 Journal of Korean medical science Vol.30 No.6

Objective personality tests, such as the Minnesota Multiphasic Personality Inventory (MMPI), might be more sensitive to reflect subclinical personality and be more statedependent in an individual’s lifetime, so they are good scales to predict the psychological distress regarding certain states. The aim of this study was to identify the specific pattern between body mass index (BMI) and psychological distress using the objective personality test. For this study, we investigated BMI and the Korean Military Multiphasic Personality Inventory (MPI). A retrospective cross-sectional study was conducted with 19-yr-old examinees who were admitted to the Military Manpower Administration in Korea from February 2007 to January 2010. Of 1,088,107 examinees, we enrolled 771,408 subjects who were psychologically apparent healthy possible-military-service groups. Afterwards, we reviewed and analyzed directly measured BMI and MPI results. In terms of the validity scales, the faking-good subscale showed an inverted U-shaped association, and fakingbad and infrequency subscales showed a U-shaped association with BMI groups. In terms of the neurosis scales, all clinical subscales (anxiety, depression, somatization, and personality disorder) also showed a U-shaped association with BMI groups. For the psychopath scales, the schizophrenia subscale showed a U-shaped association, and the paranoia subscale showed a near-positive correlation with BMI. In conclusion, a specific U-shaped pattern was observed between BMI and the MPI in 19-yr-old men in Korea. Underweight and obesity are related to psychological distress, so supportive advice and education are needed to them.

Complications Including Capsular Contracture in Direct-to-Implant Breast Reconstruction With Textured Anatomical Versus Smooth Round Implants: A Single Center Retrospective Analysis

전홍배,이민영,노태석,정준,안성귀,배숭준,이나라,김영석 한국유방암학회 2023 Journal of breast cancer Vol.26 No.1

Purpose: Implant-based breast reconstruction is the most common reconstruction method used after mastectomy in breast cancer patients. Many studies have compared the smooth round implants and textured anatomical implants. This study aimed to compare the complications, including capsular contracture, between these two implants used in direct-to-implant (DTI) breast reconstruction. Methods: This retrospective chart review was performed using a prospectively maintained database from a single center. We identified patients who underwent mastectomy with DTI single-stage breast reconstruction at our hospital between August 2011 and June 2021. The overall complications, including capsular contracture, postoperative infection, seroma, hematoma, implant rupture, implant exposure, rippling, implant malposition, and nipple necrosis, were analyzed. Results: In total, 340 breasts of 323 patients were reconstructed by the DTI approach using either textured anatomical (n = 203) or smooth round (n = 137) implants. The incidence of overall complications and capsular contracture was significantly lower with smooth round implants than with textured anatomical implants. Multivariate analysis showed that smooth round implants were associated with a reduced risk of overall complications (odds ratio [OR], 0.465; 95% confidence interval [CI], 0.265–0.813) and capsular contracture (OR, 0.475; 95% CI, 0.235–0.962). Particularly, smooth round implants were associated with a decreased risk of overall complications in patients not receiving adjuvant chemotherapy and a decreased risk of capsular contracture in patients with body mass index < 25 kg/m2 and in those not receiving adjuvant radiotherapy. Conclusion: Smooth round implants demonstrated a decreased risk of overall complications and capsular contracture when compared with textured anatomical implants. These results may be utilized in counseling patients regarding the advantages and disadvantages of smooth round implants in DTI breast reconstruction.

유방에 발생한 엽상종양의 치료 및 즉시 유방재건

강태조,김영석,노태석,유원민,탁관철,정준 대한성형외과학회 2008 Archives of Plastic Surgery Vol.35 No.5

Purpose: There have been limited reports on breast reconstruction after excision of phyllodes tumor. This paper reports four patients who had immediate reconstruction of the breast following excision of phyllodes tumor. Methods: We retrospectively reviewed the medical records of 14 patients from March 2000 to March 2008. Clinical data were analyzed including age, presenting symptoms and signs, type of surgery and metastasis. Results: The mean age was 38.6 years. The mean follow-up period was 40.6 months. Reconstruction was performed with latissimus dorsi musculocutaneous flap in 3 patients and transverse rectus abdominis musculocutaneous flap in 1 patient. Other cases were covered with skin graft or primary repair. 2 local recurrent cases were noted. Conclusion: The breast affected by phyllodes tumor must undergo complete excision. Followed by mastectomy, immediate reconstruction of breast improved cosmetic results, and allowed a wider surgical excision margin of tumor.