Anastomosing Hemangioma Mimicking Renal Cell Carcinoma

차재성,정영범,김형진 대한비뇨기종양학회 2016 대한비뇨기종양학회지 Vol.14 No.2

Anastomosing hemangioma (AH), a rare benign vascular tumor, is a newly recognized variant of capillary hemangioma. In the microscopic examination, this tumor has characteristic feature of the unique anastomosing sinusoidal capillary sized vessels. It can be misdiagnosed as a malignancy such as renal cell carcinoma or angiosarcoma. Herein, we report a case of AH originating in the right kidney of a 43-year-old man, which was initially considered as cystic renal cell carcinoma on computed tomography (CT). The patient underwent laparoscopic radical nephrectomy, but pathologic result was AH of the kidney. There was no evidence of recurrence or metastasis 5 months after the surgery.

Tag Refinement를 이용한 이미지 어노테이션

차재성,조선영,어영정,김성도,변혜란 한국정보과학회 2012 정보과학회논문지 : 소프트웨어 및 응용 Vol.39 No.8

최근 Flickr, Facebook과 같은 사진 공유 기반의 소셜 미디어 공유 사이트의 발전으로 인해 이미지의 양이 폭발적으로 증가하면서, 효율적인 이미지 검색을 위한 연구가 활발히 진행되고 있다. 이와 함께 이미지에 자동으로 관련된 태그를 어노테이션하는 이미지 태깅 연구가 진행되고 있으며, 이미지 뿐 아니라 태그와 같은 이미지에 달린 컨텍스트 정보까지도 함께 고려함으로써 태깅 성능을 높이려는 시도를 하고 있다. 본 논문에서는 일관성 있는 태그 추출을 위해 Tag refinement를 이용한 웹이미지 어노테이션 방법을 제안한다. 제안하는 방법은 1) 관심영역 기반의 이미지 특징을 이용하여 쿼리의 이웃 이미지를 검색한다, 2) 검색된 이웃 이미지의 태그로부터 NMF 클러스터링을 기반으로 하여 쿼리와 관련된 태그를 추출한다, 3) 추출된 태그의 순서를 Tag Refinemt를 통해 관련성 순으로 결정하여 태깅한다. Flickr로부터 수집한 태그가 달린 이미지 데이터셋에 대해 실험하였고, 일반적인 이웃 투표 기법을 포함하여 클러스터링 방법과 제안하는 방법을 비교함으로써 태깅 성능을 평가한 결과 제안하는 방법이 기존의 방법보다 더 높은 태깅 정확도를 가지고 있음을 보였다. Recently, with the development of social multimedia tagging through Flickr and Facebook, many researches have studied by using social tag-annotated web image. However, previous methods produced the tag list with low consistency since low correlation among extracted tags. This paper proposes web image annotation through tag refinement for the consistent tag extraction. Our method produces tag result with high relevancy and consistency. We conduct an experiment on annotated web image dataset collected from Flickr. We show that the proposed method gives more high performance in tagging accuracy and consistency than the previous methods.

하부요로증상과 발기부전의 연관성

차재성,박종관 대한비뇨의학회 2005 Investigative and Clinical Urology Vol.46 No.10

Purpose: The aim of this study was to assess whether there was an association between lower urinary tract symptoms(LUTS) and erectile dysfunction(ED) in men. Materials and Methods: 79 patients who had LUTS, between January 2002 and July 2004, were randomly retrospectively analyzed. LUTS and ED were assessed by validated symptom scales, including the International Prostate Symptom Score(IPSS), the Danish Prostate Symptom Score1 (DAN-PSS1) and the International Index of Erectile Function(IIEF). The patients were divided into three group according to age; younger than 60(group I), 60 to 69(group II), and 70 years or older(group III). Results: The mean age was 62.6±9.19 years. Prevalence rate of mild, moderate and severe LUTS were 12.9, 67.7 and 19.4% in group I, 8.3, 58.3 and 33.4% in group II, and 16.6, 54.2 and 29.2% in group III, respectively. The mean IIEF scores by IPSS according to the severity were 39.8, 38.4 and 28.7 in group I and 54.5, 39.8, and 24.3 in group II and 29.5, 16.5 and 15.6 in group III, retrospectively. In each group, the IIEF score decreased with increasing IPSS, LUTS was also shown to be statistically significantly correlated with the presence of ED(p=0.028). No statistical significance was found between the IPSS and DAN-PSS1(p=0.740). Conclusions: These results suggested that ED was highly prevalent among patients with LUTS, and erectile function should be evaluated in the patients with LUTS for the management of ED and to improve the quality of life of these patients

Myelolipomas of Both Adrenal Glands

차재성,신유섭,김명기,김형진 대한비뇨의학회 2011 Investigative and Clinical Urology Vol.52 No.8

Adrenal myelolipoma is a rare, nonfunctional benign tumor that is composed of mature adipose tissue and hematopoietic elements. In the past, these tumors were accidentally discovered at autopsy. Today, they are found much more frequently and incidentally, mainly because of the widespread use of noninvasive imaging with ultrasonography, computed tomography, and magnetic resonance imaging. Most lesions are asymptomatic, small, and unilateral, but a number of bilateral tumors have been reported. We report here on a case of a 48-year-old man with incidentally found myelolipomas of both adrenal glands. In particular, a giant myelolipoma of the left adrenal gland was treated by transperitoneal laparoscopic adrenalectomy.

HYBRID IMPLANT RESTORATIONS

차재성,조재근 대한치과기공학회 2006 대한치과기공학회지 Vol.28 No.2

비조영증강 전산화단층촬영상 신 유두 석회화와 관련된 요석 위험인자의 분석

차재성,전상봉,김명기,정영범,김영곤 대한비뇨의학회 2006 Investigative and Clinical Urology Vol.47 No.5

전립선암의 진단에서 12군데 경직장 전립선 조직 생검의 한계성

차재성 ( Jai Seong Cha ),최만수 ( Wan Sou Cui ),정영범 ( Young Beom Jeong ),박영경 ( Young Kyung Park ),박종관 ( Jong Kwan Park ) 전북대학교 의과학연구소 2006 全北醫大論文集 Vol.30 No.2

혈청 PSA의 상승 시 초음파를 이용한 경직장 12군데 전립선 조직 생검과 전립선절제술 시 채취한 조직에서 전립선암으로 진단되었던 11명의 환자에서 12군데 전립선 조직 생검의 진당율은 9.1%의 한계성을 보이고 있었다. 따라서 전립선암 환자를 선별하기 위하여 12군데 조직검사 외에 더많은 생검 수 (core)와 영역을 넓히는 방법이 시도되어야 할 것으로 생각된다. Purpose: This report describes the limitation of transrectal prostate needle biopsy with 12 biopsy cores taken to diagnosis prostate cancer. Material and Methods: We retrospectively analyzed the 11 patients (2.56%) in 430 patients included in the study, who had transurethral resection of prostate (TUR-P) due to benign prostate hyperplasia (BPH) but pathologic results were prostate adenocarcinoma in the period from January 1998 till July 2004. All patients with over 4 ng/mL of prostate specific antigen (PSA) were undertaken the 1st transrectal ultrasono guided prostatic needle biopsy to rule out prostatic adenocarcinoma from BPH. The patients who were received TUR-P were undertaken the 2nd transrectal prostate needle biopsy blindly just before TUR-P under anesthesia. Results: In 11 patients, the mean age was 74.0 years and the mean volume of the prostate was 46.0 gm. The pre-operative mean serum prostate specific antigen (PSA) and free PSA was 19.5 ng/mL. There was no patient with below 4 ng/mL at serum PSA. In 9 of 11 patients the 1st biopsy showed BPH, but pathological results after TUR-P was confirmed to prostate adenocarcinoma. Adenocarcinoma was only detected on one core in the one patient (9.1%) at TRUS guided biopsy at 12 sites on operation room. Conclusions: Our result suggest that more biopsy core number and area were needed for increasing detection rates of prostate adenocarcinoma.

특징점 검출을 이용한 내용 기반 영상 검색

차재성(Jaeseong Cha),변혜란(Hyeran Byun) 한국정보과학회 2010 한국정보과학회 학술발표논문집 Vol.37 No.2C

내용 기반의 영상 검색 시스템들은 영상 데이터의 전체적인 화소 단위의 특징 정보를 이용하여 영상을 분석하기 때문에 실제 인간이 영상을 인지하는 것과 다르게 해석되는 문제점이 있다. 때문에 이러한 의미적 차이를 해결하기 위하여 영상의 내용을 대표할 수 있는 특정 영역이나 객체 단위의 특징을 추출하는 방법에 대한 연구가 활발하게 진행되고 있다. 본 논문에서는 그래프 기반의 특징점 검출 방법을 사용하여 객체의 영역을 검출하고 주어진 객체 영역을 통해 특징을 추출하여 색상과 질감 정보를 결합함으로써 영상 검색의 정확도를 향상시키는데 의의를 두고 있다.

고객 만족 모형과 활용

차재성(Jae Sung Cha),김영찬(Young Chan Kim) 이화여자대학교 경영연구소 2002 신산업경영저널 Vol.20 No.1

Efficacy and Safety of the TVT-SECUR^Ⓡ and Impact on Quality of Life in Women with Stress Urinary Incontinence: A 2-Year Follow-Up

신유섭,차재성,천민우,김영곤,김명기 대한비뇨의학회 2011 Investigative and Clinical Urology Vol.52 No.5

Purpose: As recently reported, the short-term results of the tension-free vaginal tape SECUR^Ⓡ (TVT-S) procedure seem to be similar to those of the conventional transobturator tape (TOT) procedure. However, results of efficacy and satisfaction with TVT-S are insufficient in patients with more than 1 year of follow-up. Therefore, we evaluated the results of the TVT-S procedure in women with stress urinary incontinence (SUI) during 2 years. Materials and Methods: We evaluated 51 patients with clinical and urodynamic diagnoses of SUI who underwent the TVT-S procedure from March 2008 to February 2009. Preoperative evaluation included a history, cough stress test with full bladder, urodynamic study, and incontinence quality of life (I-QoL) questionnaire. Following the postoperative period, urinary incontinence status was examined through a physical examination and the I-QoL questionnaire was completed in an outpatient setting or by telephone. Results: Data from 2 years of follow-up were available for 46 of 51 patients. The cure rate was 80.4% at 1 month after TVT-S and 76.0% at 2 years after TVT-S. The cure or improvement rate was 93.5% at 1 month after TVT-S and 86.8% at 2 years after TVT-S. The mean total I-QoL score increased by 42 points at 1 month after TVT-S (p<0.026) and by 32 points at 2 years after TVT-S (p<0.013). Most patients reported significant improvements in quality of life. At the 2-year follow-up, there were no significant complications related to TVT-S. Conclusions: The results of this study suggest that TVT-S is an efficient and safe procedure for the improvement of both the quality of life of the patients and the SUI itself. Purpose: As recently reported, the short-term results of the tension-free vaginal tape SECUR^Ⓡ (TVT-S) procedure seem to be similar to those of the conventional transobturator tape (TOT) procedure. However, results of efficacy and satisfaction with TVT-S are insufficient in patients with more than 1 year of follow-up. Therefore, we evaluated the results of the TVT-S procedure in women with stress urinary incontinence (SUI) during 2 years. Materials and Methods: We evaluated 51 patients with clinical and urodynamic diagnoses of SUI who underwent the TVT-S procedure from March 2008 to February 2009. Preoperative evaluation included a history, cough stress test with full bladder, urodynamic study, and incontinence quality of life (I-QoL) questionnaire. Following the postoperative period, urinary incontinence status was examined through a physical examination and the I-QoL questionnaire was completed in an outpatient setting or by telephone. Results: Data from 2 years of follow-up were available for 46 of 51 patients. The cure rate was 80.4% at 1 month after TVT-S and 76.0% at 2 years after TVT-S. The cure or improvement rate was 93.5% at 1 month after TVT-S and 86.8% at 2 years after TVT-S. The mean total I-QoL score increased by 42 points at 1 month after TVT-S (p<0.026) and by 32 points at 2 years after TVT-S (p<0.013). Most patients reported significant improvements in quality of life. At the 2-year follow-up, there were no significant complications related to TVT-S. Conclusions: The results of this study suggest that TVT-S is an efficient and safe procedure for the improvement of both the quality of life of the patients and the SUI itself.