Results 251 to 260 of about 2,804,406 (287)

Multi-frequency differential image enhancement of nanosized ultrasound contrast agents

2014 IEEE International Symposium on Medical Measurements and Applications (MeMeA), 2014
Aim of the present work was to perform a detailed experimental investigation on the applicability ranges of a novel ultrasound (US) imaging method, that has been recently proposed by our research group in order to facilitate the detection of targeted nanosized contrast agents on diagnostic echographic images.
Casciaro S, Soloperto G, Greco A, Conversano F, LayEkuakille A   +4 more
openaire   +1 more source

Enhancing the Role of Ultrasound with Contrast Agents

2006
Section I: Technique and Methodology of Contrast Ultrasound: Contrast-Enhanced Ultrasound: Basic Physics and Technology Overview.- Section II: Clinical Application of Contrast Ultrasound in Liver Diseases: Characterisation of Benign Focal Liver Lesions with Contrast-Enhanced Ulstrasound (CEUS).- Characterisation of Hepatocellular Carcinoma in Cirrhosis.
openaire   +1 more source

4581 Usefulness of echo-enhancing agents in endoscopic ultrasound.

Gastrointestinal Endoscopy, 2000
Introduction: Endoscopic ultrasound with electronic linear array scanners has the advantage to apply Color Doppler during the EUS exam. Due to technical and patients conditions detection of blood flow can be limited, especially when vessels are located far away from the transducer, blood flow velocity is slow or the vessels run perpendicular to the ...
Dirk Becker, Deike D. Strobel, Thomas Bernatik, Johannes M. Haensler, Eckhart G. Hahn   +4 more
openaire   +1 more source

The investigation of contrast-agent enhanced ultrasound thermal effect

IEEE Ultrasonics Symposium, 2005., 2006
In recent years, high intensity focused ultrasound (HIFU) was shown to have promising effect on ablating both malignant and benign tumors. Despite its unique advantages such as minimal invasiveness and radiation free, the size of the ablation lesion is small and thus the duration for complete tumor ablation is usually too long.
Y.S. Tung, C.C. Wu, H.L. Liu, K.C. Ju, W.S. Chen, W.L. Lin   +5 more
openaire   +1 more source

Residual Ultrasound-Enhancing Agents Mimicking Portal Venous Gas

Ultrasound Quarterly
Abstract Sonographic detection of mobile echogenic foci within the main portal vein and its branches or within the liver parenchyma extending along the portal triads to the periphery of the liver is an alarming finding that has been associated with portal venous gas in the setting of bowel ischemia.
Ryan Bitar, Jonathan Langdon, Manroop Kaur, Ian Crandall, Robert McNamara, Margarita Revzin   +5 more
openaire   +2 more sources

Enhancement of ultrasound-induced apoptosis and cell lysis by echo-contrast agents

Ultrasound in Medicine & Biology, 2003
To determine the effects of echo-contrast agents (ECAs) on ultrasound (US)-induced apoptosis and cell lysis, human myelomonocytic lymphoma U937 cells in suspension were exposed to 1 MHz continuous waves US for 1 min at an intensity of 0.5, 1.0, 2.0 or 4.0 W/cm(2) with or without non-shell type ECA, Levovist (2 mg/ml), and shell type, Optison (1 microl ...
Loreto B, Feril, Takashi, Kondo, Qing-Li, Zhao, Ryohei, Ogawa, Katsuro, Tachibana, Nobuki, Kudo, Shinichi, Fujimoto, Shinobu, Nakamura   +7 more
openaire   +2 more sources

Therapeutic Ultrasound Contrast Agents for the Enhancement of Tumor Diagnosis and Tumor Therapy

Journal of Biomedical Nanotechnology, 2015
The functionality of ultrasound in early cancer detection is limited because of its relatively low contrast resolution. Because it has a high degree of echogenicity, a microbubble contrast agent is often used to overcome this intrinsic limitation of imaging at low-contrast resolution.
Hyungwon, Moon, Changhan, Yoon, Tae Woong, Lee, Kyoung-Su, Ha, Jin Ho, Chang, Tai-Kyong, Song, Kwangmeyung, Kim, Hyuncheol, Kim   +7 more
openaire   +2 more sources

Enhanced Targeting of Ultrasound Contrast Agents Using Acoustic Radiation Force

Ultrasound in Medicine & Biology, 2007
Contrast-enhanced ultrasound has shown significant promise as a molecular imaging modality. However, one potential drawback is the difficulty that ultrasound contrast agents (UCA) may have in achieving adhesion to target molecules on the vascular endothelium. Microbubble UCA exhibit a lateral migration toward the vessel axis in laminar flow, preventing
Joshua J, Rychak, Alexander L, Klibanov, Klaus F, Ley, John A, Hossack   +3 more
openaire   +2 more sources

Ultrasound enhanced delivery of macromolecular agents in brain tumor rat model

2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2011
The purpose of this study was to evaluate the permeability of the blood-brain barrier (BBB) after focused ultrasound (FUS) exposure and to investigate if such an approach increases the tumor-to-ipsilateral brain permeability ratio. Normal rats and F98 glioma-bearing rats were injected intravenously with Evans blue (EB); these treatments took place with
Feng-Yi Yang, Shih-Cheng Horng
openaire   +2 more sources

Simulation of Contrast Agent Enhanced Ultrasound Imaging Based on Field II

2008
Pulse-echo ultrasound signal formation can be simulated by numerical emulation of the process chain: emit signal — electromechanical emit transformation — wave propagation and scattering — electromechanical receive transformation — receive signal. The simulation software Field II is indented for simulation of linear ultrasound systems.
Tobias Gehrke, Heinrich M. Overhoff
openaire   +2 more sources