Polyoxometalate-based high-spin cluster systems: a NMR relaxivity study up to 1.4 GHz/33 T

2019 ◽  
Vol 48 (41) ◽  
pp. 15597-15604 ◽  
Author(s):  
Masooma Ibrahim ◽  
Steffen Krämer ◽  
Nicolas Schork ◽  
Gisela Guthausen
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Contrast Agents ◽  
High Spin ◽  
Special Interest ◽  
Materials Science ◽  
Process Engineering ◽  
Resonance Imaging ◽  
Cluster Systems ◽  
Spin Cluster

Paramagnetic polyoxometalates are of special interest with regard to their application as alternative contrast agents in nonhuman magnetic resonance imaging which is increasingly used in materials science and process engineering.

Supramolecular Enhancement of Aminoxyl ORCA Contrast Agents

2019 ◽  
Author(s):  
Hamilton Lee ◽  
Jenica Lumata ◽  
Michael A. Luzuriaga ◽  
Candace Benjamin ◽  
Olivia Brohlin ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Side Effects ◽  
Magnetic Resonance ◽  
Tobacco Mosaic Virus ◽  
Contrast Agents ◽  
Single Molecule ◽  
Organic Radical ◽  
Resonance Imaging ◽  
Physiological Conditions

<div><div><div><p>Many contrast agents for magnetic resonance imaging are based on gadolinium, however side effects limit their use in some patients. Organic radical contrast agents (ORCAs) are potential alternatives, but are reduced rapidly in physiological conditions and have low relaxivities as single molecule contrast agents. Herein, we use a supramolecular strategy where cucurbit[8]uril binds with nanomolar affinities to ORCAs and protects them against biological reductants to create a stable radical in vivo. We further over came the weak contrast by conjugating this complex on the surface of a self-assembled biomacromolecule derived from the tobacco mosaic virus.</p></div></div></div>

scholarly journals Magnetic resonance thermometry using a GdIII-based contrast agent

2021 ◽  
Vol 57 (14) ◽  
pp. 1770-1773
Author(s):  
S. A. Amali S. Subasinghe ◽  
Jonathan Romero ◽  
Cassandra L. Ward ◽  
Matthew D. Bailey ◽  
Donna R. Zehner ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Contrast Agent ◽  
Contrast Agents ◽  
Resonance Imaging ◽  
Magnetic Resonance Thermometry

The complexes described here serve as contrast agents for magnetic resonance imaging thermometry.

Biocompatible dextran-coated gadolinium-doped cerium oxide nanoparticles as MRI contrast agents with high T1 relaxivity and selective cytotoxicity to cancer cells

2021 ◽  
Author(s):  
Anton Popov ◽  
Maxim Artemovich Abakumov ◽  
Irina Savintseva ◽  
Artem Ermakov ◽  
Nelly Popova ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Contrast Agents ◽  
Mri Contrast Agents ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Resonance Imaging ◽  
Mri Contrast ◽  
Selective Cytotoxicity ◽  
Magnetic Resonance Imaging Mri

Gd-based complexes are widely used as magnetic resonance imaging (MRI) contrast agents. The safety of previously approved contrast agents is questionable and is being re-assessed. The main causes of concern...

scholarly journals Manganese Ferrite Nanoparticles Encapsulated into Vitamin E/Sphingomyelin Nanoemulsions as Contrast Agents for High‐Sensitive Magnetic Resonance Imaging

2021 ◽  
pp. 2101019
Author(s):  
Sandra Díez‐Villares ◽  
Miguel A. Ramos‐Docampo ◽  
Andrés da Silva‐Candal ◽  
Pablo Hervella ◽  
Abi J. Vázquez‐Ríos ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Vitamin E ◽  
Magnetic Resonance ◽  
Contrast Agents ◽  
Ferrite Nanoparticles ◽  
Manganese Ferrite ◽  
Resonance Imaging

scholarly journals Polyphosphorhydrazone-Based Radical Dendrimers

Molecules ◽  
2021 ◽  
Vol 26 (5) ◽  
pp. 1230
Author(s):  
Vega Lloveras ◽  
José Vidal-Gancedo
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Contrast Agents ◽  
Biomedical Applications ◽  
Organic Radicals ◽  
Resonance Imaging ◽  
Metal Free ◽  
Antioxidant Agents ◽  
New Type ◽  
Paramagnetic Properties

The search for new biomedical applications of dendrimers has promoted the synthesis of new radical-based molecules. Specifically, obtaining radical dendrimers has opened the door to their use in various fields such as magnetic resonance imaging, as anti-tumor or antioxidant agents, or the possibility of developing new types of devices based on the paramagnetic properties of organic radicals. Herein, we present a mini review of radical dendrimers based on polyphosphorhydrazone, a new type of macromolecule with which, thanks to their versatility, new metal-free contrast agents are being obtained, among other possible applications.

Colloidally Stable Monodisperse Fe Nanoparticles as T2 Contrast Agents for High-Field Clinical and Preclinical Magnetic Resonance Imaging

2021 ◽  
Vol 4 (2) ◽  
pp. 1235-1242
Author(s):  
Armita Dash ◽  
Barbara Blasiak ◽  
Boguslaw Tomanek ◽  
Abhinandan Banerjee ◽  
Simon Trudel ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Contrast Agents ◽  
High Field ◽  
Resonance Imaging ◽  
Fe Nanoparticles ◽  
T2 Contrast Agents
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