Applications magnetic resonance imaging coils

Clearly, the basic imaging scheme can be extended to include relaxation-time contrast for discrimination of variations in cross-link density and strain, and the ID MRI-MOUSE (magnetic resonance imaging MOUSE) can be extended with further gradient coils to permit imaging in three dimensions. Numerous applications of the MRI-MOUSE can be envisioned in soft matter analysis, in particular in those areas, where imaging with conventional equipment has proven to be successful, and where smaller, less expensive, and mobile devices are in need. 

Figure 16.20. Performance comparison of a body coil (left) and a surface coil (right). (Reprinted with permission from Wehrli FW, Shaw D, Kneeland JB, eds. Biomedical Magnetic Resonance Imaging. Principles, Methodology and Applications. VCH Publishers, Inc., Weinheim, Germany. 1988. Copyright 1988 VCH Publishers, Inc.)...

The application of Magnetic Resonance Imaging (MRI) in these studies provides the additional advantage that characterization can be carried out in a non-invasive manner. This is also illustrated in Figure 1. After impregnation, the extrudate is simply placed into the RF-coil of the spectrometer. A multinuclear MRI technique allows for the detection of the H, C, and Pt... 

A second approach involves selective excitation, as has been used for slice selection in magnetic resonance imaging,and uses the pulse sequence shown in Figure 7.15A. Application of the gradient causes the individual spectra from the samples in the four coils to be centered at different frequencies, as described by the following equation ... 

Sintered magnets based on the Nd2Fei4B phase are the most important material for industrial magnetic applications. The most important applications are voice-coil motors (VCM) for hard disk drives, CD/MD pick-up systems, magnetic resonance imaging (MRI), and more recently motors for the electrical vehicle (EV) (Hirosawa and Kaneko 1998). 

A magnetic resonance spectroscopic imaging (MRSI) pulse sequence based on proton-echo-planar-spectroscopic-imaging (PEPSI) is introduced." Single-shot MRSI at short TE was evaluated in phantoms and in vivo on a 3-T whole-body scanner equipped with a 12-channel array coil. This MRSI method is suitable for applications that require high temporal resolution to monitor temporal dynamics or to reduce sensitivity to tissue movement. 

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