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원위요관결석에서의 경직장 초음파검사의 유용성 및 경정맥 요로조영술과의 비교
최문혜 대한영상의학회 1996 대한영상의학회지 Vol.35 No.1
Purpose : To determine the usefulness of transrectal ultrasound (TRUS) and to compare TRUS with intravenousurography (IVU) in the evaluation of distal ureteral calculi. Materials and Methods : TRUS and IVU were perfomedin 24 patients with distal ureteral calculi. Using TRUS, we evaluated the presence and size of calculus, type of ureteral jet at the affected site and diameter of ureter proximal to calculus, and using IVU evaluated the presence and size of calculus, degree of ureteral obstruction, and degree of hydroureter. TRUS and IVU findings, were compared. Results : In each patient, TRUS detected calculus of the distal ureter ; in only 18cases (75%),were the calculi demonstrated with IVU. In 18 cases where calculi were detected by both modalities, averagecalculus size was 4.5 $\times$ 3.0mm (longest and shortest dimensions) by IVU, and 6.1 $\times$ 3.7 mm by TRUS. Betwee TRUS and IVU(p<0.05) there was a statistically significant difference in the longest dimension of calculi. Color Doppler imaging revealed three patterns of ureteral jets in TRUS : normal periodic jet (7 cases) ; continuous low-level flow (8 cases) ; and no detectable jet (9 cases). There was a positive correlation between type of ureteral jetson TRUS and between degree of obstruction on IVU (r=0.59, p<0.05). There was, however, no significant correlation between diameter of ureter proximal to calculus on TRUS and degree of hydroureter on IVU (r=0.32, p>0.05). Conclusion : TRUS appears to be a useful adjunctive method for the evaluation of distal ureteral calculus.
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박범진(Beomjin Park),최문혜(Moonhuae Choi),강성기(Sunggi Kang) 한국자동차공학회 2013 한국자동차공학회 학술대회 및 전시회 Vol.2013 No.11
Each parts of vehicles have possibility of fail occurrence, which potentially may cause field action on sold vehicles. Each manufacturers are spending astronomical amount of field action cost, and are required to decide correct field action level. Warranty trend analysis is essentially required for decision, which enables best field action level decision by projecting warranty frequency based on each conditions. In the long view, this satisfies customer, keep brand reputation and increase manufacturer"s income. Hereby, method and effect of warranty trend analysis & projection will be reviewed.
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자궁 경부암의 간질 침윤 깊이 평가에 있어서 역동적 자기공명영상 및 조영 증강 후 T1 강조 영상의 유용성
최동일,김보현,김응엽,조성기,황재웅,최문혜,최상희,김승훈,박창수 대한영상의학회 1998 대한영상의학회지 Vol.39 No.5
Purpose : The purpose of this study was to evaluate the usefulness of contrast enhancement in assessing the depth of stromal invasion in patients with uterine cervical tumors by comparing dynamic and late contrast-enhancedT1-weighted MR imaging with T2-weighted MR imaging.Materials and Methods : Of 58 surgically proven uterine cervical cancer patients, 31 in whom tumors were seen on MRI were included in this study. Using a 1.5 T magnet, T2-weighted contrast-enhanced dynamic, and T1-weighted MR imaging were performed. In each MR imaging sequence, tumor visualization, margin delineation, enhancement pattern and depth of stromal invasion were evaluated on sagittal images and were correlated with pathological findings of resected uterus, focusing on the depth of stromal invasion. Results : Surgical FIGO stages were IB1 in 20 patients, IB2 in three, IIA in six, and IIB in two. A tumor was detected in 29 (94%) patients on T2-weighted images, in 26 (84%) on dynamic contrast enhanced images, and in 28 (90%) on contrast enhanced T1-weighted images. The tumor demonstrated a clear margin in 22 (71%)patients on late contrast-enhanced T1-weighted images, in 21 (68%) on dynamic images, and in 13 (42%) onT2-weighted images. Correlated with pathologic findings, the depth of stromal invasion was overestimated onT2-weighted images in eight (26%) patients, and on dynamic and late contrast-enhanced T1-weighted images in three (10%) and three (10%) respectively. Conclusion : Tumor margins are clearer and the extent of tumors may be more accurately evaluated on dynamic MR and late contrast-enhanced T1-weighted imaging. These sequences thus seem to be useful, and superior to T2-weighted imaging, for assessing the depth of stromal invasion in patients with cervical carcinoma.
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초음파로 진단된 유방영상보고데이터체계 범주 4a 질환의 조직병리학적 분석
조백현,김의정,장소용,김희정,문희정,박양순,이일균,김도일,이원흥,류정규,최문혜,이영란,윤회수,윤세옥 한국유방암학회 2008 Journal of breast cancer Vol.11 No.3
PURPOSE: We analyzed the histopathologic findings of the patients with ultrasongraphic BI-RADS Category 4a breast lesions to determine which patient can be excluded from any invasive, diagnostic procedure in the future. METHODS: Of the 180 cases of BI-RADS Category 4a breast lesions that were diagnosed with ultrasonography during a 6 month-period, 132 cases were pathologically confirmed and these were analyzed retrospectively. Four benign cases that did not undergo any further procedure after fine needle biopsy and 6 malignant cases (4.5%) were excluded from this study. RESULTS: Of the 122 cases, 77 cases (63.1%) showed homogeneous benign finding, and 45 cases (36.9%) showed heterogeneous finding that was made up of two or more different pathologic lesions. Fibroadenoma(55.8%) was the most frequent pathologic finding in the cases with homogeneous finding, followed by fibrocystic change(14.3%), and fibrosis(7.8%). The cases with heterogeneous finding presented fibrocystic change (55.5%), microcalcification(48.8%), ductal hyperplasia(42.2%), and fibroadenoma(31.1%) in the order of frequency. CONCLUSIONS: Lesion with heterogeneous histopathologic nature was the most frequent finding defined as category 4a in breast ultrasonography, followed by fibrodenoma, fibrocysic change, microcalcification, and ductal hyperplasia. Refining more specific ultrasonographic findings of these lesions would guarantee that radiologists exclude more benign lesions from category 4a.
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