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        Pleomorphic Carcinoma with the Air-Crescent and CT Halo Signs: A Case Report

        안영이,박현진,김기준,유진영,조규도,백준현 대한영상의학회 2010 대한영상의학회지 Vol.62 No.2

        A pulmonary pleomorphic carcinoma is a rare, poorly differentiated, primary malignancy. We report an atypical manifestation of this rare tumor, with the air crescent and CT halo signs.

      • KCI등재

        Synovial Chondrosarcoma in the Hand and Wrist: A Case Report

        안영이,김지영,강석진,강용구,백준현 대한영상의학회 2010 대한영상의학회지 Vol.62 No.1

        Synovial chondrosarcoma is extremely rare and arises de novo or from malignant transformation of synovial chondromatosis. It commonly involves large joints, such as the knee or hip. Here, we present an unusual case of synovial chondrosarcoma from synovial chondromatosis in the hand and wrist, clearly demonstrating the characteristic findings on plain radiograph and MR imaging.

      • KCI등재

        Treatment Response Evaluation of Breast Cancer after Neoadjuvant Chemotherapy and Usefulness of the Imaging Parameters of MRI and PET/CT

        안영이,김성헌,강봉주,이아원 대한의학회 2015 Journal of Korean medical science Vol.30 No.6

        This study was aimed to evaluate the ability of imaging parameters measured on dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI), diffusion-weighted MRI (DWI) and positron emission tomography/computed tomography (PET/CT) to serve as response markers in breast cancer after neoadjuvant chemotherapy (NAC). In 20 patients with breast cancer, DCE-MRI and DWI using a 3 T scanner and PET/CT were performed before and after NAC. DCE-MRI was analyzed using an automatic computer-aided detection program (MRCAD). The response imaging parameters were compared with the pathologic response. The areas under the curve (AUCs) for DCE-MRI using MR-CAD analysis, DWI and PET/CT were 0.77, 0.59 and 0.76, respectively. The combination of all parameters measured by MRCAD showed the highest diagnostic performance and accuracy (AUC = 0.77, accuracy = 90%). The combined use of the parameters of PET/CT with DCE-MRI or DWI showed a trend toward improved specificity and negative predictive value (100%, 100%, accuracy = 87.5%). The use of DCE-MRI using MR-CAD parameters indicated better diagnostic performance in predicting the final pathological response compared with DWI and PET/CT, although no statistically significant difference was observed. The combined use of PET/CT with DCE-MRI or DWI may improve the specificity for predicting a pathological response.

      • KCI등재

        Diffuse Infiltrative Lesion of the Breast: Clinical and Radiologic Features

        안영이,김성헌,차은숙,김현숙,강봉주,박창숙,정나영,황인용,윤수경 대한영상의학회 2011 Korean Journal of Radiology Vol.12 No.1

        The purpose of this paper is to show the clinical and radiologic features of a variety of diffuse, infi ltrative breast lesions, as well to review the relevant literature. Radiologists must be familiar with the various conditions that can diffusely involve the breast, including normal physiologic changes, benign disease and malignant neoplasm.

      • KCI등재

        Response Evaluation to Neoadjuvant Chemotherapy in Advanced Breast Cancer: Comparison of MRI and Positron Emission Tomography/CT (RECIST 1.1 versus PERCIST 1.0)

        안영이,김성헌,박영하 대한영상의학회 2014 대한영상의학회지 Vol.71 No.2

        Purpose: The aim of this study was to compare the diagnostic performances between the Response Evaluation Criteria in Solid Tumors version 1.1 (RECIST 1.1) criteria on dynamic contrast enhanced magnetic resonance imaging (DCE-MRI) and positron emission tomography Response Evaluation Criteria in Solid Tumors version 1.0 (PERCIST 1.0) criteria on positron emission tomography/CT (PET/CT) in evaluating the treatment response of neoadjuvant chemotherapy (NAC) in breast cancer patients. Materials and Methods: We compared MRI and PET/CT in the assessment of tumor response after NAC with the pathological response as the standard reference in 54 breast cancer patients. The tumor response was assessed by using the RECIST 1.1 criteria on DCE-MRI and PERCIST 1.0 criteria on PET/CT. The diagnostic performance of RECIST 1.1 and PERCIST 1.0 criteria was statistically analyzed and compared by receiver operating characteristic (ROC) analysis. Results: There were 21 responders and 33 non-responders according to the pathology. The discordant rate with pathological response was 37.0% for RECIST 1.1 and 55.6% for PERCIST 1.0. Twenty six patients (48.1%) were classified as responders in both MRI and PET/CT, but the final pathology showed non-response. In the ROC curve, the area under the curves (AUC) was 0.89 for RECIST 1.1 and 0.79 for PERCIST 1.0 (p < 0.001). Conclusion: The RECIST 1.1 criteria on MRI showed the better diagnostic performance than PERCIST 1.0 criteria on PET/CT for the response assessment of breast cancer after NAC, although there was no statistically significant difference between both (p = 0.15).

      • KCI등재

        유방의 비정형 관상증식증: 탄성초음파검사를 이용하여 악성으로의 등급상향을 예측할 수 있는가?

        안영이,김성헌,강봉주,이아원,송병주 대한영상의학회 2011 대한영상의학회지 Vol.64 No.4

        Purpose: To evaluate whether the sonoelastographic features of atypical ductal hyperplasia (ADH) can be used to predict an upgrade to malignancy. Materials and Methods: Conventional US and sonoelastographic images were available in 17 women with 18 ADH lesions diagnosed by sonographically guided core needle biopsy. Conventional US findings were analyzed according to the Breast Imaging Reporting and Data System classification. Elastographic images were classified into 5 elasticity scores according to the ITOH classification. In addition, the strain ratio between the mass and surrounding fat tissue as well as the mammographic features were reviewed. All lesions underwent subsequent surgical excision and a correlation was found for sonoelastographic and conventional US findings with pathologic results. Results: Of the 18 ADH lesions that underwent surgical excision, four were found to be malignant (underestimation rate of 22.2%). Moreover, there was no significant difference in elasticity score (p=0.054) and strain ratio (p=0.375) between atypical ductal hyperplasia and lesions upgraded to malignancy on elastography. A mass with microcalcifications on mammography had a significantly higher association with malignancy and microcalcifications, as opposed to the absence of a mass, which was in all cases, benign (p=0.036). Conclusion: Sonoelastography may not be a helpful indicator for the differentiation of atypical ductal hyperplasia from malignant lesions. However, a correlation with mammographic features provides insight for predicting malignancy. 목적: 탄성초음파 영상을 사용하여 비정형 관상증식증의 악성종양으로의 등급상향의 위험도를 예측할 수 있는지 알아보고자 하였다. 대상과 방법: 고식적 초음파와 탄성초음파를 모두 시행하였으며 추후 수술적 제거를 한 총 17명의 환자, 18예를 대상으로 고식적 초음파와 탄성초음파 소견을 후향적으로 분석하였다. 고식적 초음파 소견은 BI-RADS 범주에 따라 분석하였으며, 탄성초음파에서는 Itoh의 분류에 따른 탄성점수와 변형률을 분석하였다. 이중 유방촬영술을 시행하였던 16예의 유방촬영술 소견을 후향적으로 분석하였다. 결과: 수술적 절제를 통해 총 4예에서 악성으로 등급상향 되었으며, 저평가율은 22.2%였다. 악성으로 등급상향 된 군과 그렇지 않은 군 간의 초음파 BI-RADS 범주와 탄성초음파에서의 탄성점수(p=0.054)와 변형률(p=0.375)은 통계학적으로 유의한 차이는 없었다. 유방촬영술에서 종괴와 미세석회화가 함께 있는 경우 악성으로 등급상향 되었으며, 미세석회화만 있는 경우는 양성이었고 모두 통계적으로 의의가 있었다(p=0.036). 결론: 탄성초음파 자체로는 비정형 관상증식증의 악성으로의 등급상향 위험도를 예측할 수 없지만, 유방촬영술 결과를 함께 해석한다면 도움이 될 수 있다.

      • 서울시내 남ㆍ여 중ㆍ고교 책ㆍ걸상 사용실테 및 개선방안 : 책ㆍ걸상 높이를 중심으로

        안영,권봉안 한국체육대학교 부속 체육연구소 1986 체육연구소논문집 Vol.4 No.-

        The purposes of this study were to investigate the desk & chair height state, manufactured state, and to grasp the simple reckoner, standard values in junior & sinior high school. As the subject of this stduy, 1384 male & female pupils were selected in juniro & sinior high school at Seoul. The data including the subjects' stature, sitting height, and length of lower thigh were analyzed to find the study key by using computer. The results and conclusions were as follows; 1. The desk and chair hight in junior & siniro high school were nearly the same size, and these were not various. Therefore, their hight wer fower and highter than mean size in each level. The satisfactory range in the chair hight was 41.2% (male/middle school), 43.2% (female/middle school), 49.7% (female/high school), 85.1% (male/high school), and the satisfactory range in desk height was 42.6% (male/high school), 68.8% (male/middle school), 71.6% (female/middle school), 84.6% (female/high school). ㆍThe maximum height in desk & chair were 74cm (desk) & 45cm (chair), therefore 3% girls' middle school students mere not satisfied, 10% girls' high school students were not satisfied, and 20% boys' middle school students, 50% boys' high school students were not satisfied. 2. The Standard values in each level were as follows; 3. The simple reckoner in each level were as follows: 1) Stature: Sitting height : length of lower thigh = 3.55 : 1.89 : 1 (boys' middle school students)/3.66:1.96:1 (boys' high school students)/ 3.66:1.97:1 (girls' middle & high school students). 2) Stature : Desk height : Chair height = 1:0.45:0.27 (body' middle school students)/ 1:0.44:0.26 (boys' high school students, girls' middle & high school students) 3) Sitting height : Desk height : Chair height = 1:0.84:0.51 (boys' middle school students)/ 1:0.82:0.49 (girls' middle school students)/ 1:0.83:0.49(boys' & girls' high school students).

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