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Result : Searchterm 'Intera' found in 9 terms [ ] and 36 definitions [ ]
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The interactions between the most tested heart valve prostheses and the magnetic field of MRI devices are of no significance. However, there are many different types of heart valve prostheses and in the particular case their MRI safety should be checked.
Prosthetic heart valves, depending on the type and the material, are not necessarily considered to be dangerous in fields up to 3T. Patients should not undergo high field MRI examinations if valve dehiscence is clinically suspected. | | | | • For this and other aspects of MRI safety see our InfoSheet about MRI Safety. | | | • Patient-related information is collected in our MRI Patient Information.
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A measure of the non-spherical distribution of electrical charge possessed by nuclei with a nuclear spin number greater than 1/2. The resulting interaction with electric field gradients in the molecule can lead to a shortening of relaxation times and a broadening of spectral lines. | | | | | |
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Paramagnetic compounds designed to induce a shift in the resonance frequency of nuclei with which they interact. For example, many rare earth's have been used as shift reagents for positive metal ions such as sodium and potassium. | | | | | |
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From GE Healthcare;
GE's Signa Contour/i system uses the innovations like K4 technology and real-time interactive imaging.
This compact magnet with wide-flare gantry obtains high patient comfort with low costs.
Device Information and Specification CLINICAL APPLICATION Whole body Head and body coil standard; all other coils optional; open architecture makes system compatible with a wide selection of coils Standard: SE, IR, 2D/3D GRE and SPGR, Angiography;; 2D/3D TOF, 2D/3D Phase Contrast;; 2D/3D FSE, 2D/3D FGRE and FSPGR, SSFP, FLAIR, optional: EPI, 2D/3D Fiesta, FGRET, Spiral2D 0.8 mm to 20 mm; 3D 0.1 mm to 5 mm 128x512 steps 32 phase encode POWER REQUIREMENTS 480 or 380/415 V STRENGTH SmartSpeed 23 mT/m, HiSpeed Plus 33 mT/m | | | | | |
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For the wide uses of NMR spectroscopy (from mineralogy to medicine) there is a variety of different spectroscopic imaging techniques available.
A short listing of the most frequent variations:
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'Two-dimensional NMR Spectroscopy' (2D NMR) is based on pulse spectroscopy. This technique is mostly used for the study of chemical interactions accompanied by magnetization transfer. Examples for more diversified spectroscopy techniques are based on homonuclear (COSY, TOCSY, 2D-INADEQUATE, NOESY, ROESY) or heteronuclear correlation (HSQC, HMQC, HMBC).
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'Solid State NMR Spectroscopy' analyzes samples with little or no molecular mobility. Dipolar coupling and chemical shift anisotropy are the dominating nuclear physical effects here. Used for example in pharmaceutical analysis.
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'Solution State NMR Spectroscopy' is a technique to analyze the structure of samples with a high degree of molecular mobility as polymers, proteins, nucleic acids etc.
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• View the DATABASE results for 'Spectroscopic Imaging Techniques' (2).
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