이하선 종양에 관한 임상적 연구

백승,오희균,박홍주,유선열,김원재 전남대학교 치의학연구소 2002 구강과학 Vol.14 No.3

This is a clinical study on 113 patients, who were treated for parotid tumors at Chonnam National University Hospital over a period of 5 years from January 1996 to December 2000. The results were as follow, 1. The mean ages were 42.6 years old (12~73 years) for benign parotid tumor patients and 43.9 years old (2~74 years) for malignant patients. 2. The ratio of male to female was 1:2 in malignant parotid tumors, but there was no difference in sex distribution of benign tumor. 3. There was no difference in mean mass size and duration of illness between benign and nalignant tumor patients. 4. The combined use of fine needle aspiration biopsy and computed tomograph was common as the diagnostic method of parotid tumor 5. The parotid tumors were commonly located in the superficial lobe(69%). 6. The ratio of benign and malignant tumors was 4:1. The most common benign tumor was pleomorphic adenoma (72% of benign tumor), followed by Warthin's tumor and monomorphic adenoma. The most common malignant tumor was rnucoeplderrnoid carcinoma(45% of malignant tumor). followed by adenoid cystic carnoma. carcinoma ex pleomorphic adenoma, and adenocarcinoma. 7. The most common operations were superficial parotidectomy (72%) for benign parotid tumor and total parotidectomy (45%) for malignant tumor 8. The most common postoperative complication was temporary facial nerve weakness (82%), followed by Frey's syndrome (14%) and permanent facial palsy (4%). 9. Postoperative radiation therapy was done in 12 patients and the mean radiation dose was 5550±620cGy. 10. Of 113 cases. tumor recurrence developed in 12 cases (10%). These results suggest that the successful management of parotid gland tumors needs adequate surgical treatment on the basis of knowledge of parotid gland anatomy and preoperative diagnosis.

손을 이용한 복강경하 공여신적출술과 관혈적 공여신적출술과의 비교

백승,김철성,노준 대한비뇨의학회 2005 Investigative and Clinical Urology Vol.46 No.11

Purpose: To assess the efficacy, morbidity and patient recovery of hand- assisted laparoscopic donor nephrectomy(HALDN), we compared our initial experience with HALDN to that of the standard open donor nephrectomy(ODN). Materials and Methods: Between March 2002 and March 2004, one surgeon performed 18 cases of HALDN and 9 cases of ODN at our institution. Operative outcome were reviewed, including operative time, warm ischemic time, blood loss, time to oral intake, length of hospital stay, postoperative analgesic requirement, complications and graft function. Results: The mean operative time was 232 minutes and 192 minutes(p<0.01), and the mean warm ischemic time was 185 seconds and 168 seconds (p=0.28) for HALDNs and ODNs, respectively. The mean blood loss and time to oral intake were similar. The mean hospital stay was 4.3 days and 8.7 days(p<0.01), and the mean analgesic dose was 80mg of piroxicam and 260mg of piroxicam(p<0.01) for HALDNs and ODNs, respectively. No patient required open conversion. Complications occurred in 2 cases in HALDNs and in 1 case in ODNs. All donated kidneys were transplanted with immediate good function. The recipients' serum creatinine level at 1, 2, and 3 years after transplantation showed no significant difference between the two groups. Conclusions: HALDN is technically feasible and appears to be a safe and effective surgical method. HALDN provides the donor with faster convalescence, while maintaining a healthy renal allograft function for the recipient.

뿌리기업(표면처리)의 화학물질관리법 대응방안

백승 한국표면공학회 2016 한국표면공학회 학술발표회 초록집 Vol.2016 No.11

방광에 발생한 Malakoplakia

백승,김철성,임동훈 대한요로생식기감염학회 2013 Urogenital Tract Infection Vol.8 No.2

Malakoplakia is a rare chronic granulomatous disease, which was originally described in the urinary bladder, but can involve many other organs and soft tissues. Malakoplakia is often associated with immunosuppression or immunodeficiency and is believed to be caused by an alternation in the bacterial phagocytic system. Histologically, the presence of Michaelis-Gutmann bodies is pathognomonic. We report on a case of malakoplakia of the bladder in a 62-year-old female.

다제내성 임균감염

백승,임동훈 대한요로생식기감염학회 2013 Urogenital Tract Infection Vol.8 No.2

Gonorrhea, caused by Neisseria gonorrhoeae is the second most prevalent bacterial sexually transmitted infection. The disease causes serious reproductive compli-cations such as pelvic inflammatory disease, ectopic pregnancy, and infertility, and can facilitate human immunodeficiency virus transmission. Numerous anti-microbial agents have been used for the treatment of gonorrhea since sulfanilamides were introduced in 1936. Unfortunately, N. gonorrhoeae readily develops resistance to antimicrobial agents. Strains with decreased susceptibility to oral third generation cephalosporin (cefixime) are currently emerging. The US Centers for Disease Control and Prevention (CDC) no longer recommends cefixime at any dose as a first-line regimen for treatment of gonococcal infections, but recommends combination therapy with ceftriaxone 250 mg intramuscularly and either azithromycin 1 g orally as a single dose or doxycycline 100 mg orally twice daily for 7 days as the most reliably effective treatment for uncomplicated gonorrhea.

직장수지검사가 요류측정검사 결과에 미치는 영항

백승,소영석,노준,김철성,장대수 朝鮮大學校 附設 醫學硏究所 2004 The Medical Journal of Chosun University Vol.29 No.1

Background and Objectives : Digital rectal examination (DRE) and uroflowmetry have been usually together in the BPH management. The aim of this study was to determine whether DRE would affect uroflowmetry measurement. Materials and methods : A total of 80 male patients were included in this study. First uroflowmetry was done after DRE, second uroflowmetry was done without DRE. Third uroflowmetry was done after DRE, and fourth was done without DRE. Results : The mean Qmax on uroflowmetry after DRE was 15.2±8.7㎖/sec and 14.9±9.8㎖/sec. The mean Qmax on only uroflowmetry was 15.3±8.9㎖/sec and 15.4±8.4㎖/sec. There was statistically no difference between the mean Qmax(P> 0.05). And effect of digital rectal examination on uroflowmetry measurement with age was statistically no difference between the mean Qmax(P)0.05). Conclusions : We could not find and effect of DRE on uroflowmetry parameters, In this study, uroflowmetry test would be appropiate for recommending DRE before or after.

이하선 종양에 관한 임상적 연구

백승,하주원,오희균,유선열,김원재 大韓顎顔面成形再建外科學會 2002 Maxillofacial Plastic Reconstructive Surgery Vol.24 No.5

This is clinical study on 113 patients who were treated for parotid tumors at Chonnam National University Hospital over a period of 5 years from January 1996 to December 2000. The results were as follows ; The mean ages were 42.6 years old (12∼73 years) for benign parotid tumor patients and 43.9 years old (2∼74 years) for malignant patients. The ratio of male to female was 1:2 in malignant parotid tumors, but there was no difference in benign tumors. There was no difference in mean mass size and duration of illness between benign and malignant tumor patients. The combined usage of fine needle aspiration biopsy and computed tomogram was common as the diagnostic methods of parotid tumor. The parotid tumors were commonly located in the superficial lobe (69%). The ratio of benign and malignant tumors was 4:1. The most common benign tumor was pleomorphic adenoma (72% of benign tumor), followed by Warthin's tumor and monomorphic adenoma. The most common malignant tumor was mucoepidermoid carcinoma (45% of malignant tumor), followed by adenoid cystic carnoma, carcinoma ex pleomorphic adenoma, and adenocarcinoma. The most common operations were superficial parotidectomy (72%) for benign parotid tumor and total parotidectomy (45%) for malignant tumor. The most common postoperative complication was temporary facial nerve weakness (82%), followed by Frey's syndrome (14%) and permanent facial palsy (4%). Postoperative radiation therapy was done in 12 patients (60%) and the mean radiation dose was 5550±620 cGy. Of 113 cases, tumor recurrence developed in 12 cases (10%). These results suggest that the successful management of parotid gland tumors needs adequate surgical treatment on the basis of knowledge of parotid gland anatomy and preoperative diagnosis.

다중방향성 정합선 최적화와 신뢰도 기반 공백복원을 이용한 스테레오 정합

백승해,박순용,Baek, Seung-Hae,Park, Soon-Young 한국정보처리학회 2010 정보처리학회논문지B Vol.17 No.2

최근 스테레오 정합 기술은 정합하고자 하는 픽셀을 포함한 국부적인(local) 영상의 정합 비용과 시차의 변화 비용을 누적하는 전역적(global)인 방법을 많이 사용하고 있다. 특히 전역적 스테레오 정합에서도 비용누적 (cost accumulation)의 방향을 일반적인 수평방향이 아닌 다수의 방향을 사용하는 연구가 늘고 있다. 본 논문에서는 기존의 스테레오 정합 기술을 다중 방향성 정합 기술로 확장하는 방법을 제안한다. 픽셀의 국부적인 정합 비용은 단순한 NCC (Normalized Cross Correlation)를 사용하였고 전역적 정합 기술의 하나인 정합선 최적화(Scan-line Optimization) 방법을 다중 방향으로 확장하는 기술을 제안하였다. 우선 정합선 최적화를 다중 방향으로 실행한 후 이들 결과를 이용하여 신뢰도가 높은 시차영상 (disparity image)을 획득한다. 반복적인 다중 방향 정합선 최적화 시행 후, 시차영상에서 남은 공백은 홀 복원 방법으로 계산한다. 시차가 구해진 픽셀에 대해서는 신뢰도 점수를 매긴 다음 이 점수를 확산하여 신뢰도 점수 테이블에서 가장 높은 값을 가지는 시차값으로 홀을 복원하였다. 제안하는 기술을 미들버리(Middlebury)의 스테레오 영상을 사용하여 오차를 분석하였다. 기존의 전역적 방법과 제안 기술을 이용하여 시차영상을 계산하고 그 오차를 비교하였다. Stereo matching techniques are categorized in two major schemes, local and global matching techniques. In global matching schemes, several investigations are introduced, where cost accumulation is performed in multiple matching lines. In this paper, we introduce a new multi-line stereo matching techniques which expands a conventional single-line matching scheme to multiple one. Matching cost is based on simple normalized cross correlation. We expand the scan-line optimization technique to a multi-line scan-line optimization technique. The proposed technique first generates a reliability image, which is iteratively updated based on the previous reliability measure. After some number of iterations, the reliability image is completed by a hole-filling algorithm. The hole-filling algorithm introduces a disparity score table which records the disparity score of the current pixel. The disparity of an empty pixel is determined by comparing the scores of the neighboring pixels. The proposed technique is tested using the Middlebury and CMU stereo images. The error analysis shows that the proposed matching technique yields better performance than using conventional global matching algorithm.

사용자 행위인식을 위한 Google Activity Recognition의 정확성 개선 방안

백승은(Seungeun Baek),박상원(Sangwon Park) 한국정보과학회 2014 한국정보과학회 학술발표논문집 Vol.2014 No.6

Homography 변환을 이용한 스테레오 방사선 센서의 보정

백승해(SeungHae Baek),라쓰나야카 파툼 반다라(Pathum Bandara Rathnayaka),박순용(Soon-Yong Park) 대한전기학회 2014 정보 및 제어 심포지엄 논문집 Vol.2014 No.10