• Proceedings of the Korean Information Science Society Conference
• /
• 2004.04b
• /
• pp.505-507
• /
• 2004

시트콤 동염상은 고정된 배경을 갖는 중 아웃에 연이어 오는 줌 인으로 구성되어 있고, 또한 활영되는 배경의 수는 한정되어 있는 특성이 때문에, 이러한 배경의 시각적 특성을 사용하여 배경들을 학습시키고 자동으로 분리시킬 수 있다. 본 논문에서는 신경망의 일종인 LVQ[1]를 사용하여 이러한 증류의 비디오 동영상에 대한 자동 배경 분류 방법을 제안한다. 우선, MPEG-7 시각 기술자를 이용하여 신(scene) 배경의 시각적인 특성을 추출하고 이러한 시각적 특성을 미리 제작자에 의해서 주어진 배경 점보로서 LVQ를 학습시킨다. 학습이 진행되면서 특정 배경의 시각적 특성은 LVQ의 가중치로서 표현되며, 다른 배경을 자동으로 분류하는데 사용된다 제안된 LVQ기반의 분류 방법을 사용한 두 종류의 시트콤 동영상에 대한 실험 결과는 분류에 대한 어떠한 하드코딩 없이 80-90%의 정확도로 시트콤 동영상의 배경을 자동으로 분류한다.

• The Korean Journal of Medicine
• /
• v.99 no.3
• /
• pp.158-163
• /
• 2024

This case underscores the rarity of bilateral subcapsular renal hematoma (SCH) as a complication of acute pyelonephritis, and this is the first reported case in South Korea. SCH can have various underlying causes, including cysts, bleeding tendencies, cancer, vascular diseases and, less commonly, infections. A patient with uncontrolled diabetes mellitus and alcohol dependency presented with weakness. Bilateral SCH from acute pyelonephritis was diagnosed and treated with antibiotics and renal replacement therapy. Despite improved renal function, 30-day bilateral percutaneous drainage was necessary due to a persistent fever and elevated infection markers, resulting in a bloody, pus-like discharge. This case report sheds light on the rare etiology of bilateral SCH as a result of acute pyelonephritis. It serves as a reminder of the critical importance of timely intervention, to prevent deteriorating outcomes.

• Journal of Yeungnam Medical Science
• /
• v.9 no.1
• /
• pp.149-155
• /
• 1992

55 consecutive anatrophic nephrolithotomies on 53 patients performed between July, 1983 and June, 1990 were reviewed. The patients(36 male and 19 female) ranged in age from 3 to 72years. The operation time averaged 219.8 minutes with a range of 120-330 minutes, and the ischemic time ranged between 20 and 90 minutes, with a mean of 43.5 minutes. Postoperative complications developed in 18 patients, which were such as persistent urinary tract infection in 5cases(9.4%), atelectasis in 4(7.5%), transient urine leak in 2(3.8%), delayed bleeding in 2(3.8%) and urinary retention in 2(3.8%), Postoperative residual stones were identified in 15(27.3%), but in 8 of these 15patients stones were delivered spontaneously and thus 48 of 55 cases(87.3%) became stone free, The recurrence of stone was noted in 2 out of 48 patients during the short followup period. Anatrophic nephrolithotomy seems to be an effective method compared to other procedure because of decreasing recurrence of stone by complete stone removal and reconstruction of abnormal collecting system.

• Childhood Kidney Diseases
• /
• v.10 no.1
• /
• pp.27-32
• /
• 2006

Purpose : Conservative management of multicystic dysplastic kidney(MCDK) without nephrectomy has recently been advocated. The purpose of this study was to determine the clinical course of conservatively managed MCDK and to find out possible predictive factors for involution of MCDK by ultrasonography(US). Methods : A retrospective analysis was made on 45 patients(26 boys and 20 girls) in whom MCDK was detected and had been traced by US between Dec. 1993 and Aug. 2005 at Severance Hospital. Results : Median follow-up time was 30 months(range 2-102 months). All patients under-went radionuclide scans and voiding eystourethrograms. The serial follow-up US showed complete involution in 11(24%), partial involution in 19(41%), and no interval change or increased in cyst size in 13(28%) patients. Nephrectomy was done in 3 patients(7%) due to relapsing urinary tract infection(UTI) and severe abdominal distension. The mean age of complete involution of MCDK was 37 months(range 12-84 months). Episodes of UTI were present in 17 patients(37%) and additional genitourinary(GU) abnormalities were found in 22 patients(44%). Hypertension and renal insufficiency was complicated in one patient. No child developed malignant tumor. Univariate analysis showed that five variables were associated with complete involution of the MCDK; gender, site, UTI episode, additional GU abnormalities, and renal length on initial US. After adjusting using the Pearson model, the presence of additional GU abnormalities was exclusively associated with complete involution among the 5 variables(P=0.034). Conclusion : In our review of 46 cases of MCDK, non-surgical approach for patients with MCDK was advisable and we could predict poor prognosis when MCDK is associated with other GU anomalies.

• Annals of Clinical Neurophysiology
• /
• v.9 no.1
• /
• pp.33-35
• /
• 2007

Meralgia paresthetica (MP) is a benign entrapment neuropathy which is characterized by sensory impairment and paresthesia in the cutaneous distribution of the lateral femoral cutaneous nerve. A 79-year-old woman presented with intermittent right inguinal burning sensation. The sensory nerve conduction study (NCS) showed decreased right side sensory nerve action potential (SNAP) on lateral femoral cutaneous nerve compared to the contralateral one. Abdomino-pelvic CT showed bilateral huge renal cysts (The size of largest one on right side: about $6.2{\times}5.0cm$). We report a case of MP caused by a huge abdominal renal cyst, which should be considered when conventional examination reveals no responsible etiology.

• Journal of Korean Neurosurgical Society
• /
• v.29 no.4
• /
• pp.569-573
• /
• 2000

Spinal meningeal cyst of the sacrum is uncommon congenital lesion. We experienced two cases of sacral meningeal cyst, so called Tarlov's cyst, who presented with radiating pain. Magnetic resonance imaging is a highly effective way of locating and approximating the size of these entities, which generally appear as intraspinal masses of low intensity on T1-weighted and high intensity on T2-weighted images, similar to cerebrospinal fluid(CSF). We evaluated 2 patients who had Tarlov's cyst diagnosed with conventional MRI. The clinical features, radiological findings, gross appearances of the lesion at surgery, surgical technique, histopathological features of the cyst wall, and surgical outcome are described. We conclude that excellent result can be expected in the case of symptomatic Tarlov's cyst by surgical decompression.

• Clinical and Experimental Pediatrics
• /
• v.50 no.2
• /
• pp.178-181
• /
• 2007

Purpose : The renal manifestations of tuberous sclerosis complex (TSC) are remarkably diverse, including polycystic kidney disease, simple renal cysts, renal cell carcinomas, and angiomyolipomas. All of these occur in children as well as adults in TSC. Angiomyolipomas, which can cause spontaneous life-threatening hemorrhages, are by far the most prevalent and the greatest source of morbidity. Here, we will address our experience, adding to the literature on pediatric patients with TSC requiring evaluation and treatment for renal manifestations. Methods : A retrospective analysis was made on 19 patients in whom TSC was diagnosed between May 2001 and Oct. 2005 at Severance Hospital. All patients had clinical diagnoses of TSC as defined by the 1998 tuberous sclerosis complex consensus conference. Results : The patients consisted of 13 boys and 6 girls with a mean age of 7.3 years (range 1 to 22). The renal disease associated with TSC included angiomyolipoma in nine patients (47.4 percent), renal simple cyst in one (5.3 percent), hydronephrosis in one (5.3 percent) patient. Eight patients (42.1 percent) presented with normal kidney contours at abdominal ultrasonography. One patient underwent renal replacement therapy due to chronic renal insufficiency after nephrectomy. Hemorrhage from angiomyolipoma was not detected. Conclusion : In our review of 19 cases of TSC, renal manifestations are reported in 57.9 percent of patients. Asymptomatic angiomyolipoma associated with TSC grow gradually, although severe hemorrhages are rare. So patients with TSC should be followed up with serial computerized tomography or abdominal ultrasonography. And also, renal function should be monitored conservatively.

• Korean Journal of Veterinary Research
• /
• v.15 no.1
• /
• pp.27-38
• /
• 1975

The following tumors occurring naturally in the dog were studied pathologically and discussed briefly. Tumors of the skin and subcutis: Fibroma, Lipoma, Epidermal cyst, Melanosarcoma, Sweat gland adenoma, Mastocytoma (2 cases), Mastosarcoma, and Sebaceous gland carcinoma. Tumors of the spleen and lymph node: Fibrosarcoma of the capsule of spleen, Leiomysarcoma of the spleen, and Lymphosarcoma of the lymph node (2 cases). Tumors of the lung: Bronchogenic carcinoma (3 cases), Adenocarcinoma type, Squamous carcinoma type, and Undifferentiated (round cell) carcinoma type respectively. Tumors of the alimentary tract and liver: Fibroma of the stomach, Hemangioma of the liver, Bile duct carcinoma, Liver cell carcinoma, and Myelogenous leukemia manifested in the liver. Tumor of the peritoneum: Fibrosarcoma. Tumors of the urogenital system: Fibroma of the uterus, Fibroma of the prepuce, Follicular cyst of the ovary, Transmissible venereal tumor of the vagina (6 cases), Carcinoma of the kidney, Adenoma of the prostate (2 cases), and Seminoma of the testis. Tumors of the mammary gland: Mixed tumor (2 cases), and Myoepithelioma. Tumor of the nervous system: Neurofibrosarcoma of the thigh.

• Clinical and Experimental Pediatrics
• /
• v.45 no.7
• /
• pp.923-927
• /
• 2002

Congenital hepatic fibrosis is a relatively rare disease, characterized by bile ductular proliferation and prominent fibrosis in the portal area of liver resulting in portal hypertension. It is frequently associated with other abnormalities such as polycystic kidney, Caroli syndrome, cystic dysplasia of pancreas, intestinal lymphangiectasia, pulmonary emphysema, hemangioma, and cleft palate. We report here a case of congenital hepatic fibrosis associated with renal tubular ectasia in a 3-year-old girl, whose chief complaint was abdominal distension. Her liver function test did not reveal any abnormal findings. Hepatosplenomegaly and multiple dilated bile ducts were seen in the abdominal CT scaning. Esophageal varix was not detected by an endoscopic examination. Microscopically, diffuse portal fibrosis and widening with proliferation of blie ductules in the liver specimen and tubular ectasia in renal cortex were seen.

• Journal of Korean Neurosurgical Society
• /
• v.29 no.1
• /
• pp.113-117
• /
• 2000

Objective : Asymptomatic cyst of the pineal gland is a common incidental finding in adults on computerized tomography or magnetic resonance image(MRI) or at postmortem examination. This study was conducted to identify MRI findings of the benign pineal cysts and to determine the proper management of asymptomatic pineal cysts. Methods : From January 1995 to March 1999, 13 cases of asymptomatic pineal cysts were diagnosed incidentally on MRI. The mean age of the patients at diagnosis was 43 years(ranged 8 to 69 years). Five patients were females and eight patients were males. We analyzed the clinical presentations and MRI findings. Results : Clincal features were not related to pineal cysts in all 13 cases included posttraumatic headache in seven cases, headache related to brain tumor in two cases, one of facial palsy, one of diabetic neuropathy, and two of other diseases. MRI demonstrated a well-demarcated mass lesion(mean 1.3cm in diameter) of low signal intensity on T1-weighted images and high signal intensity on T2-weighted images. Gadolinium-enhanced MRI, performed in 10 cases, demonstrated a rim enhancement. Hydrocephalus was not present in all cases. Follow-up MRI(ranged 12 to 36 months) obtained in 3 of the 13 patients showed stability of cyst size. After symptomatic treatment, presenting symptoms were resolved in all patients and symptom related to pineal cysts have not been developed during follow up period(mean 27 months). Conclusion : The long-term behavior of asymptomatic pineal cysts is still unknown. But we advocate conservative management of these benign pineal cysts that may be developmental variants of normal pineal gland.