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Publications (3)1.42 Total impact

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    ABSTRACT: To evaluate computed tomography (CT) and magnetic resonance (MR) imaging findings of posterior mediastinal ganglioneuromas. Of 14 pathologically confirmed ganglioneuromas seen in 13 patients, 13 were evaluated by CT images with and without contrast, 11 were evaluated with conventional spin-echo MR images, and 5 were evaluated with contrast-enhanced MR examination. The morphologic features, attenuation, signal intensity, and dynamic enhancement pattern of the neoplasms were evaluated. All lesions were identified as a well-demarcated oval and/or lobular mass. CT attenuation was predominantly low. Calcification on CT scan was seen in 38% of the cases. Whorled appearance (42%) and tailed-shaped edge (14%) were seen on both CT and MR images. Fat components (29%) observed histologically were also detected in tumors on CT and MR images. MR signal intensity in the lesions was mainly low on T1-weighted images and high on T2-weighted images. Contrast enhancement of the tumors was poor in 46% on dynamic CT study. In all 5 contrast-enhanced MR examinations, all lesions were enhanced. The characteristic findings of posterior mediastinal ganglioneuromas are a craniocaudally oblong-shaped mass, calcification, whorled appearance, tail-like extension, and fat component. Poor enhancement on dynamic CT studies is commonly observed.
    Journal of thoracic imaging 01/2011; 27(2):100-6. · 1.42 Impact Factor
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    ABSTRACT: PURPOSE/AIM 1. To compare color-coded iodine images of the abdomen obtained by dual-energy CT with contrast-enhaned images, and virtual non-contrast images with true non-contrast images 2. To demonstrate the feasibility and pitfalls of the color-coded iodine imaging and virtual non-contrast CT of the liver, pancreas and biliary tract CONTENT ORGANIZATION 1. To illustrate technical backgrounds of dual energy CT and image reconstructions of the abdomen 2. To exemplify the feasibility and artifacts of the color-coded iodine imaging and virtual non-contrast CT –Fatty liver –Hepatic tumors –Portal and hepatic veins –Lipiodol deposits –Choledocal stones –Biliary stents –Acute pancreatitis –Pseudocyst –IPMN –AVM 3. To discuss the causes of the artifacts SUMMARY This exhibit reviews 1. Routine clinical use of dual-energy abdominal CT 2. Feasibility and limitations of dual-energy CT of the liver, pancreas and biliary tract
    Radiological Society of North America 2012 Scientific Assembly and Annual Meeting;
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    ABSTRACT: PURPOSE/AIM It should be essential to know the precise position and course of throracic nerves for diagnosing thoracic neurogenic tumors. To recognize the detailed findings of the various kinds of thoracic nerves and tumors we will present 2D- and 3D-anatomical and clinical images reconstructed by CT and MRI with characteristic images. CONTENT ORGANIZATION 1. 2D- and 3D-anatomy and normal CT and MRI figures of intra-thoracic nerves such as, brachial plexus, phrenic, vagus,recurrent, intercostal nerve, spinal, sympathetic ganglion, aortosympathetic paraganglion, and aortic body. 2. Presentation of the characteristic CT and MRI figures of intrathotacic neurogenic tumors such as, Schwannoma, neurofibroma, malignant peripheral nerve sheath tumor, peripheral neuroblastic tumors and paraganglioma. SUMMARY The major teaching points of this exhibit are: 1. To know the precise and detailed anatomy such as the position and course of various throracic nerves using 2D- and 3D-images reconstructed by CT and MRI. 2. To recognize the characteristic radiological findings of the thoracic neurogenic tumors. 3. These anatomical and radiological knowledge would make the differential diagnosis possible from the other tumors.
    Radiological Society of North America 2010 Scientific Assembly and Annual Meeting;