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RISS 인기검색어
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- 저자 : Jeong-MinLee (검색결과 3 건)
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Jeong-MinLee,In-HwanKim,Hyo-SungKwak,Ji-HyunYouk,Young-MinHan,Chong-SooKim 대한영상의학회 2003 Korean Journal of Radiology Vol.4 No.1
Objective: To compare the performance of superparamagnetic iron oxide (SPIO)-enhanced magnetic resonance (MR) imaging at 1.5T and dual-phase spiral computed tomography (CT) for the depiction of small hypervascular hepatocellular carcinomas (HCCs). Materials and Methods: Forty-three patients with 70 small nodular HCCs (5-20 mm; mean, 13.7 mm) were examined. Diagnosis was based on the results of surgical biopsy in 22 patients and by the combined assessment of MR imaging, lipiodol CT, alpha feto-protein levels, and angiographic findings in 21. MR imaging consisted of respiratory-triggered turbo spin-echo T2-weighted imaging, T1- weighted fast low-angle shot, and T2 -weighted fast imaging with steady-state precession imaging before and after SPIO enhancement. CT imaging was performed with 5-mm collimation and 1:1.4 pitch, and began 30 and 65 secs after the injection of 150 mL of contrast medium at a rate of 3 mL/sec. Two blinded observers reviewed all images independently on a segment-by-segment basis. Diagnostic accuracy was evaluated using receiver operating characteristics (ROC) analysis. Results: The mean areas (Az) under the ROC curves were 0.85 for SPIOenhanced MR imaging and 0.79 for dual-phase spiral CT (p < .05). The mean sensitivity of SPIO-enhanced MR imaging was significantly higher than that of CT (p < .05), i.e. 70.6% for MR imaging and 58.1% for CT. MR imaging had higher false-positive rates than dual-phase spiral CT, but the difference was not statistically significant (3.7% vs 3.3%) (p > .05). Conclusion: SPIO-enhanced MR imaging is more sensitive than dual-phase spiral CT for the depiction of small hypervascular hepatocellular carcinomas.
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Gastric Neuroendocrine Carcinoma Presenting as a Wandering Exophytic Mass: A Case Report
Hyo-SungKwak,Jeong-MinLee,Young-HwanLee,Young-KonKim,Chong-SooKim 대한영상의학회 2002 대한영상의학회지 Vol.47 No.2
We describe a case of poorly differentiated gastric neuroendocrine carcinoma presenting as a wandering exophytic mass. CT imaging revealed a 14.5×10.0×8.0 cm, lobulated, solid mass with a multifocal necrotic portion at the right of the peritoneal cavity. It was attached to the antrum of the stomach by a broad stalk, and shown by MR imaging to be well-defined, lobulated and solid, with a multifocal necrotic portion, and at the left of the peritoneal cavity. Isointensity was apparent at T1-weighted imaging, and slightly hyperintensity at T2-weighted imaging, and after gadolinium injection, enhancement was stronger than at precontrast imaging. 방사선 검사에서 유주 외장성 종양으로 나타난 미분화성 신경내분비성 암종 1예를 보고한다. 전산화단층촬영에서 복막강 우측에 위치한 약 14.5×10.0×8.0 cm 크기의 내부에 괴상부위를 가진 분엽성 고형 종양이 있었다. 종양은 넓은줄기(stalk)에 의해 위문부와 연결되어 있었다. 자기공명영상에서 종양은 복막강 좌측에 위치하며, T1 강조영상에서 등신호강도, T2 강조영상에서 고신호강도를 보였으며, 강한 조영증강소견을 보였다. 이러한 방사선 검사에서 종양의 유주는 위와 연결된 부위를 확인함으로써 종양의 원발부위를 알 수 있다.
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Ultrasonographic Resistive Index of the Cranial Pancreaicoduodenal Artery in Normal Conscious Dogs
Ki-DongEom,Hae-oonLee,Yun-sangSeong,Jeong-minLee,Jong-wonLee,Tae-hoOh 한국임상수의학회 2003 한국임상수의학회지 Vol.20 No.3
The purpose of this study was to determine the range of resistive index(RI) of the cranial pancreaticoduodenal artery(cPDA) in the normal dog's and to assess the possibility of clinical application of RI for diagnosing a pancreatitis. Five patients with acute pancreatitis and 17 healthy adult beagle dogs were used. Duplex color Doppler ultrasonographic examination was performed by using a real-time scanner with 11-MHz linear-array transducer. The dogs were restrained in dorsal recumbency without the use of chemical agent. The mean RI of the normal pancreas(0.63±0.04) was significantly(t=5.79, p=0.001) different from acute pancreatitis dog(0.75±0.04). Duplex color Doppler ultrasonography was an useful technique for detecting and measuring RI of the cPDA. The evaluation of RI of the cPDA may be a valuable supportive diagnostic procedure for evaluating the pancreatitis or suspected in dogs.
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