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Result : Searchterm 'DWI' found in 1 term [] and 40 definitions []
| previous 21 - 25 (of 41) nextResult Pages : [1] [2 3 4 5 6 7 8 9] | | | | Searchterm 'DWI' was also found in the following services: | | | | |
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Swiss-based, formerly Bruker AG - split on the 5th October 2001 into the groups: Bruker Daltonics ( Mass spectroscopy), Bruker Optics (Infrared spectroscopy), Bruker AXS (X-ray spectroscopy) and Bruker BioSpin (The largest part, the NMR business core, the EPR and the Tomography activities).
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PharmaScan® - MRI//MRS systems tailored to high-throughput and routine applications in pharmaceutical research.
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Contact Information
Please see Bruker BioSpin AG's
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'CMC Contrast AB (Copenhagen Malmø Contrast AB) was established in April 2000. CMC Contrast AB was founded by professor Henrik Thomsen and the two main owners Malmøhus Invest AB and Öresund - Healthcare Capital KS.'
'The purpose of CMC Contrast AB is to develop the product CMC 001 to a registered medicinal product with market authorisation in the international pharmaceutical markets. CMC Contrast AB holds all the rights to CMC 001, and the company aims to develop CMC 001 to a registered medicinal product on a worl dwide basis.'
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MAIL
CMC Contrast AB
Birger Jarlsgatan 26
SE-114 34 Stockholm
Sweden
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Contrast agents are chemical substances introduced to the anatomical or functional region being imaged, to increase the differences between different tissues or between normal and abnormal tissue, by altering the relaxation times. MRI contrast agents are classified by the different changes in relaxation times after their injection.
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Negative contrast agents (appearing predominantly dark on MRI) are small particulate aggregates often termed superparamagnetic iron oxide ( SPIO). These agents produce predominantly spin spin relaxation effects (local field inhomogeneities), which results in shorter T1 and T2 relaxation times.
SPIO's and ultrasmall superparamagnetic iron oxides ( USPIO) usually consist of a crystalline iron oxide core containing thousands of iron atoms and a shell of polymer, dextran, polyethyleneglycol, and produce very high T2 relaxivities. USPIOs smaller than 300 nm cause a substantial T1 relaxation. T2 weighted effects are predominant.
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A special group of negative contrast agents (appearing dark on MRI) are perfluorocarbons ( perfluorochemicals), because their presence excludes the hydrogen atoms responsible for the signal in MR imaging.
The design objectives for the next generation of MR contrast agents will likely focus on prolonging intravascular retention, improving tissue targeting, and accessing new contrast mechanisms. Macromolecular paramagnetic contrast agents are being tested worl dwide. Preclinical data shows that these agents demonstrate great promise for improving the quality of MR angiography, and in quantificating capillary permeability and myocardial perfusion.
Ultrasmall superparamagnetic iron oxide ( USPIO) particles have been evaluated in multicenter clinical trials for lymph node MR imaging and MR angiography, with the clinical impact under discussion. In addition, a wide variety of vector and carrier molecules, including antibodies, peptides, proteins, polysaccharides, liposomes, and cells have been developed to deliver magnetic labels to specific sites. Technical advances in MR imaging will further increase the efficacy and necessity of tissue-specific MRI contrast agents.
See also Adverse Reaction and Nephrogenic Systemic Fibrosis.
See also the related poll result: ' The development of contrast agents in MRI is' | | | | | | | | | | | • View the DATABASE results for 'Contrast Agents' (122).
| | | • View the NEWS results for 'Contrast Agents' (25).
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Brain imaging method may aid mild traumatic brain injury diagnosis Tuesday, 16 January 2024 by parkinsonsnewstoday.com | | |
A Targeted Multi-Crystalline Manganese Oxide as a Tumor-Selective Nano-Sized MRI Contrast Agent for Early and Accurate Diagnosis of Tumors Thursday, 18 January 2024 by www.dovepress.com | | |
FDA Approves Gadopiclenol for Contrast-Enhanced Magnetic Resonance Imaging Tuesday, 27 September 2022 by www.pharmacytimes.com | | |
How to stop using gadolinium chelates for magnetic resonance imaging: clinical-translational experiences with ferumoxytol Saturday, 5 February 2022 by www.ncbi.nlm.nih.gov | | |
Estimation of Contrast Agent Concentration in DCE-MRI Using 2 Flip Angles Tuesday, 11 January 2022 by pubmed.ncbi.nlm.nih.gov | | |
Manganese enhanced MRI provides more accurate details of heart function after a heart attack Tuesday, 11 May 2021 by www.news-medical.net | | |
Gadopiclenol: positive results for Phase III clinical trials Monday, 29 March 2021 by www.pharmiweb.co | | |
Gadolinium-Based Contrast Agents Hypersensitivity: A Case Series Friday, 4 December 2020 by www.dovepress.com | | |
Polysaccharide-Core Contrast Agent as Gadolinium Alternative for Vascular MR Monday, 8 March 2021 by www.diagnosticimaging.com | | |
Water-based non-toxic MRI contrast agents Monday, 11 May 2020 by chemistrycommunity.nature.com | | |
New method to detect early-stage cancer identified by Georgia State, Emory research team Friday, 7 February 2020 by www.eurekalert.org | | |
Researchers Brighten Path for Creating New Type of MRI Contrast Agent Friday, 7 February 2020 by www.newswise.com | | |
Manganese-based MRI contrast agent may be safer alternative to gadolinium-based agents Wednesday, 15 November 2017 by www.eurekalert.org | | |
Sodium MRI May Show Biomarker for Migraine Friday, 1 December 2017 by psychcentral.com | | |
A natural boost for MRI scans Monday, 21 October 2013 by www.eurekalert.org | | |
For MRI, time is of the essence A new generation of contrast agents could make for faster and more accurate imaging Tuesday, 28 June 2011 by scienceline.org |
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(P DWI) In density weighted imaging, the contrast is dependent on the density of protons in the tissue. Proton density weighted images are generated by choosing TR greater than T1 (typically ≥ 2 000 ms) and TE less than T2 (typically ≤ 30 ms), the two exponential terms are both close to one and therefore M is relatively independent of T1 and T2, thereby emphasizing Mxy0, which is proportional to the proton density. Also called (Rho) ρ-weighted.
See also Proton Density Weighted Image. | | | | | | • View the DATABASE results for 'Density Weighted Imaging' (2).
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(DTI) Diffusion tensor imaging is the more sophisticated form of DWI, which allows for the determination of directionality as well as the magnitude of water diffusion. This kind of MR imaging can estimates damage to nerve fibers that connect the area of the brain affected by the stroke to brain regions that are distant from it, and can be used to determine the effectiveness of stroke prevention medications.
DTI (FiberTrak) enables to visualize white matter fibers in the brain and can map ( trace image) subtle changes in the white matter associated with diseases such as multiple sclerosis and epilepsy, as well as assessing diseases where the brain's wiring is abnormal, such as schizophrenia.
The fractional anisotropy (FA) gives information about the shape of
the diffusion tensor at each voxel. The FA is based on the normalized
variance of the eigenvalues. The fractional anisotropy reflects differences between an isotropic diffusion and a linear diffusion. The FA range is between 0 and 1 (0 = isotropic diffusion, 1 = highly directional).
The development of new imaging methods and some useful analysis techniques, such as 3-dimensional anisotropy contrast (3DAC) and spatial tracking of the diffusion tensor tractography (DTT), are currently under study. | | | | • View the DATABASE results for 'Diffusion Tensor Imaging' (9).
| | | • View the NEWS results for 'Diffusion Tensor Imaging' (2).
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