• Aucun résultat trouvé

Ultrasound contrast agents

Recent Advances on Ultrasound Contrast Agents for Blood-Brain Barrier Opening with Focused Ultrasound

Recent Advances on Ultrasound Contrast Agents for Blood-Brain Barrier Opening with Focused Ultrasound

... Commercial Ultrasound Contrast Agents Commercially available UCAs used for BBB opening are either clinically approved as imaging contrast agents (Food and Drug Administration or ...

31

en
                                                                    fr

en fr Macroscopic and acousto-mechanic analogy of gas microbubble:: application to ultrasound contrast agents Analogie macroscopique et acousto-mécanique d'une microbulle: : application aux agents de contraste ultrasonore

... ABSTRACT Ultrasound contrast agents (UCAs) used in medical imaging, are one of the major innovations in the field of ...in ultrasound imaging has al- lowed, through physical properties of ...

143

Comb-Like Fluorophilic-Lipophilic-Hydrophilic Polymers for Nanocapsules as Ultrasound Contrast Agents

Comb-Like Fluorophilic-Lipophilic-Hydrophilic Polymers for Nanocapsules as Ultrasound Contrast Agents

... by the number of perfluorinated chains and the amount of polymer used for formulation: 618. capsules with several PFOB cores or fluorinated-rich domains are obtained at hig[r] ...

41

Contrast-enhanced and targeted ultrasound

Contrast-enhanced and targeted ultrasound

... the contrast between the enhancing normal liver and the nonenhancing metastases and thus improve detection, particularly of small lesions, ...of ultrasound contrast agents allows for the im- ...

15

Surface engineering of silica nanoparticles with a gadolinium–PCTA complex for efficient T 1 -weighted MRI contrast agents

Surface engineering of silica nanoparticles with a gadolinium–PCTA complex for efficient T 1 -weighted MRI contrast agents

... MRI contrast agents (CAs) is required in 30 % of all MRI procedures ...These contrast agents are mainly Gd(III) chelates, among which DOTAREM® and MAGNEVIST® are the most used nowadays, mostly ...

31

Nano-thermometers with thermo-sensitive polymer grafted USPIOs behaving as positive contrast agents in low-field MRI

Nano-thermometers with thermo-sensitive polymer grafted USPIOs behaving as positive contrast agents in low-field MRI

... USPIO@PEO 5 -st-PPO 37 core-shell nanoparticles were measured at 8.25, 20, 60, and 300 MHz. Nuclear magnetic resonance dispersion (NMRD) profiles, giving longitudinal relaxivities (r 1 ) between 0.01 and 60 20 MHz, were ...

14

Calibrated photoacoustic spectrometer for in vitro characterization of contrast agents based on a standard imaging system

Calibrated photoacoustic spectrometer for in vitro characterization of contrast agents based on a standard imaging system

... measurements at very early stages of the development of new contrast agents. This method can benefit the material science and biomedical communities and satisfy the growing need for characterization of ...

21

Utility of Elastography and Contrast-enhanced Ultrasound For The Differentiation of
Tumor Modifications Between Antiangiogenic and Cytotoxic Therapy

Utility of Elastography and Contrast-enhanced Ultrasound For The Differentiation of Tumor Modifications Between Antiangiogenic and Cytotoxic Therapy

... by contrast-enhanced ultrasound CEUS (contrast agent remains in vascular compartment) [2] and the formation of necrosis and fibrosis in the tumor can be assessed by SWE ...dynamic ...

3

The cell labeling efficacy, cytotoxicity and relaxivity of copper-activated MRI/PET imaging contrast agents

The cell labeling efficacy, cytotoxicity and relaxivity of copper-activated MRI/PET imaging contrast agents

... resonance contrast agent for selective copper sensing J Am Chem Soc, 128 (2006), ...transfection agents in forming complexes with ferumoxides, cell labeling efficiency, and cellular viability Mol Imaging, 3 ...

24

An original methodology for quantitative assessment of perfusion in small animal studies using contrast-enhanced ultrasound.

An original methodology for quantitative assessment of perfusion in small animal studies using contrast-enhanced ultrasound.

... and S max . UCA microbubble attenuation was then estimated. The method made use of the time-intensity variation in a highly echogenic distal area without contrast uptake, which pro- vided cumulative attenuation in ...

5

Empirical Research On The Optimization Of The Frequency Parameters Of " Chirp " Sequences Used In Contrast Ultrasound Imaging

Empirical Research On The Optimization Of The Frequency Parameters Of " Chirp " Sequences Used In Contrast Ultrasound Imaging

... Recently, this field is undergoing profound changes in the way of carrying out images by encoding the ultrasound waves transmitted to the medium under exploration such as tissue etc.. The reason behind coding ...

4

Multifunctional Rare Earth Vanadate Nanoparticles: Luminescent Labels, Oxidant Sensors and Magnetic Resonance Imaging Contrast Agents

Multifunctional Rare Earth Vanadate Nanoparticles: Luminescent Labels, Oxidant Sensors and Magnetic Resonance Imaging Contrast Agents

... and Gd 0.6 Eu 0.4 VO 4 nanoparticles constitute a new material. The synthesis can conveniently be performed using the colloidal chemistry pathway allowing for the formation of nanoparticles by coprecipitation of soluble ...

269

Iodine contrast agents do not influence Platelet-Rich Plasma function at an early time point in vitro

Iodine contrast agents do not influence Platelet-Rich Plasma function at an early time point in vitro

... iodine contrast agent (ICA) to the injected substance (for instance corticosteroids or hyaluronic acid) to improve the precision of fluoroscopy-guided intra-articu- lar ...

9

Vibrational dynamics of zero-field-splitting hamiltonian in gadolinium-based MRI contrast agents from ab initio molecular dynamics

Vibrational dynamics of zero-field-splitting hamiltonian in gadolinium-based MRI contrast agents from ab initio molecular dynamics

... been largely overlooked in medical resonance imaging (MRI) because of two other mechanisms which are much more effi- cient at the usual clinical fields. These are molecular tumbling and inner-sphere (IS) water exchange ...

9

Electron channelling contrast imaging: influence of diffraction conditions on the dislocation contrast

Electron channelling contrast imaging: influence of diffraction conditions on the dislocation contrast

... Dislocations dipole To get the thinnest dislocation appearance, ECC observations are carried out with s slightly positive (s>0). The region of interest is observed with different diffraction conditions g: g 1 = ...

3

Contrast enhancement of propagation based X-ray phase contrast imaging

Contrast enhancement of propagation based X-ray phase contrast imaging

... phase contrast imaging (XPCI) technique derived from propagation depen- dent phase ...phase contrast was greatly enhanced relative to conventional attenuation-based ...

12

Chromatic Contrast Sensitivity

Chromatic Contrast Sensitivity

... Temporal Contrast Like any visual contrast, chromatic contrast may occur through variations across space or across time [ 1 ...chromatic contrast consists in the simultaneous occurrence of ...

11

Mechanostereoselective One-Pot Synthesis of Functionalized Head-to-Head Cyclodextrin [3]Rotaxanes and Their Application as Magnetic Resonance Imaging Contrast Agents

Mechanostereoselective One-Pot Synthesis of Functionalized Head-to-Head Cyclodextrin [3]Rotaxanes and Their Application as Magnetic Resonance Imaging Contrast Agents

... higher contrast enhancement than the commercial CA Gd-DOTA over the full observation period, without the typical liver accumulation observed for macromolecular ...macromolecular agents while keeping the ...

6

A physiologically based pharmacokinetic model of vascular-extravascular exchanges during liver carcinogenesis: application to MRI contrast agents.

A physiologically based pharmacokinetic model of vascular-extravascular exchanges during liver carcinogenesis: application to MRI contrast agents.

... Dynamic contrast enhanced (DCE) images are of great interest for the characte- rization of hepatic tumors such as those giving rise to Hepatocellular Carcinoma ...and Ultrasound (US)) ...a contrast ...

33

en
                                                                    fr

en fr Confocal Ultrasound for the Potentiation of Chemotherapy by Ultrasonic Cavitation without External Nucleation Agents Ulilisation d’ultrasons confocaux pour la potentialisation de chimiotherapie par cavitation ultrasonore sans agents de nucléation extérieurs

... L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d’enseignemen[r] ...

158

Show all 1740 documents...

Sujets connexes