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Gadoxetic acid magnetic-enhanced resonance imaging in the diagnosis of cholangiocarcinoma 被引量:7
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作者 Riccardo Inchingolo Cesare Maino +6 位作者 Marco Gatti Eleonora Tricarico Michele Nardella Luigi Grazioli SandroSironi Davide Ippolito Riccardo Faletti 《World Journal of Gastroenterology》 SCIE CAS 2020年第29期4261-4271,共11页
The use of liver magnetic resonance imaging is increasing thanks to itsmultiparametric sequences that allow a better tissue characterization, and the useof hepatobiliary contrast agents. This review aims to evaluate g... The use of liver magnetic resonance imaging is increasing thanks to itsmultiparametric sequences that allow a better tissue characterization, and the useof hepatobiliary contrast agents. This review aims to evaluate gadoxetic acidenhanced magnetic resonance imaging in the diagnosis and staging ofcholangiocarcinoma and its different clinical and radiological classificationsproposed in the literature. We also analyze the epidemiology, risk factors incorrelation with clinical findings and laboratory data. 展开更多
关键词 Hepatobiliary contrast materials Gadoxetic acid CHOLANGIOCARCINOMA Magnetic resonance imaging LIVER CIRRHOSIS
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Plaque imaging with CT coronary angiography:Effect of intra-vascular attenuation on plaque type classification 被引量:3
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作者 Erica Maffei Chiara Martini +9 位作者 Teresa Arcadi Alberto Clemente Sara Seitun Alessandra Zuccarelli Tito Torri Nico R Mollet Alexia Rossi Onofrio Catalano Giancarlo Messalli Filippo Cademartiri 《World Journal of Radiology》 CAS 2012年第6期265-272,共8页
AIM: To assess the attenuation of non-calcified atherosclerotic coronary artery plaques with computed tomography coronary angiography (CTCA). METHODS: Four hundred consecutive patients underwent CTCA (Group 1: 200 pat... AIM: To assess the attenuation of non-calcified atherosclerotic coronary artery plaques with computed tomography coronary angiography (CTCA). METHODS: Four hundred consecutive patients underwent CTCA (Group 1: 200 patients, Sensation 64 Cardiac, Siemens; Group 2: 200 patients, VCT GE Healthcare, with either Iomeprol 400 or Iodixanol 320, respectively) for suspected coronary artery disease (CAD). CTCA was performed using standard protocols. Image quality (score 0-3), plaque (within the accessible non-calcified component of each non-calcified/mixed plaque) and coronary lumen attenuation were measured. Data were compared on a per-segment/per-plaque basis. Plaques were classified as fibrous vs lipid rich based on different attenuation thresholds. A P < 0.05 was considered significant. RESULTS: In 468 atherosclerotic plaques in Group 1 and 644 in Group 2, average image quality was 2.96 ± 0.19 in Group 1 and 2.93 ± 0.25 in Group 2 (P ≥ 0.05). Coronary lumen attenuation was 367 ± 85 Hounsfield units (HU) in Group 1 and 327 ± 73 HU in Group 2 (P < 0.05); non-calcified plaque attenuation was 48 ± 23 HU in Group 1 and 39 ± 21 HU in Group 2 (P < 0.05). Overall signal to noise ratio was 15.6 ± 4.7 in Group 1 and 21.2 ± 7.7 in Group 2 (P < 0.01). CONCLUSION: Higher intra-vascular attenuation modifies significantly the attenuation of non-calcified coronary plaques. This results in a more difficult characterization between lipid rich vs fibrous type. 展开更多
关键词 Computed tomography coronary angiography Coronary artery plaque Plaque characterization contrast material Lumen enhancement
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Radiopaque nano and polymeric materials for atherosclerosis imaging, embolization and other catheterization procedures 被引量:6
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作者 Li Tian Linfeng Lu +1 位作者 James Feng Marites P.Melancon 《Acta Pharmaceutica Sinica B》 SCIE CAS CSCD 2018年第3期360-370,共11页
A review of radiopaque nano and polymeric materials for atherosclerosis imaging and catheterization procedures is presented in this paper. Cardiovascular diseases(CVDs) are the leading cause of death in the US with at... A review of radiopaque nano and polymeric materials for atherosclerosis imaging and catheterization procedures is presented in this paper. Cardiovascular diseases(CVDs) are the leading cause of death in the US with atherosclerosis as a significant contributor for mortality and morbidity. In this review paper, we discussed the physics of radiopacity and X-ray/CT, clinically used contrast agents,and the recent progress in the development of radiopaque imaging agents and devices for the diagnosis and treatment of CVDs. We focused on radiopaque imaging agents for atherosclerosis, radiopaque embolic agents and drug eluting beads, and other radiopaque medical devices related to catheterization procedures to treat CVDs. Common strategies of introducing radiopacity in the polymers, together with examples of their applications in imaging and medical devices, are also presented. 展开更多
关键词 Radiopaque contrast nanoparticles and materials X-ray CT Vascular diseases ATHEROSCLEROSIS PLAQUE STENOSIS EMBOLIZATION Inferior vena cava filters
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SENSITIVITY ANALYSIS WITH RESPECT TO THE ELECTRICAL CONDUCTIVITY
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作者 Habib Ammari Cedex +1 位作者 France Hyeonbae Kang 《Journal of Computational Mathematics》 SCIE CSCD 2007年第3期244-251,共8页
In this paper, we consider conductivity inclusions inside a homogeneous background conductor. We provide a complete asymptotic expansion of the solution of such problems in terms of small variations in the electrical ... In this paper, we consider conductivity inclusions inside a homogeneous background conductor. We provide a complete asymptotic expansion of the solution of such problems in terms of small variations in the electrical conductivity of the inclusion. Our method is based on a boundary integral perturbation theory. Our results are valid for both high and low contrast inclusions. 展开更多
关键词 High contrast material Full-asymptotic expansions Boundary integral equa-tion.
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