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Result : Searchterm 'Excitation' found in 10 terms [] and 86 definitions []
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Volume Excitation Stimulated Echoes
 
(VEST) The 'Volume Excitation Stimulated Echoes' sequence is a method similar to point resolved spectroscopy with stimulated echoes and volume selective excitation.
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Tilt Optimized Nonsaturated Excitation
 
(TONE) Used to decrease the saturation effect of inflowing blood in 3D MRA scans, the flip angle varies linearly over the excited chunk. In multi chunk scans TONE decreases the Venetian blind artifact or allows thicker chunks to cover a larger anatomical region.

See also Variable Flip Angle.
 
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Rapid Excitation Magnetic Resonance ImagingInfoSheet: - Sequences - 
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(RE MRI) There are several approaches to speeding up the MRI data acquisition process by repeating the excitation by RF pulses in times short compared to T1, typically using small flip angles and gradient echo refocusing. When TR is also on the order of or shorter than T2, the repeated RF pulses will tend to refocus transverse magnetization remaining from prior excitations, setting up a condition of steady state free precession, and a dependence of signal strength (and image contrast) on both T1 and T2.
This can be modified in various ways, particularly:
1) to spoil the tendency to build up a steady state by reducing coherence between excitations, e.g. by variation of the phase or timing of consecutive RF pulses or of the strength of spoiler gradient pulses, thus increasing the relative dependence of signal strength on T1 or
2) acquire the signal when it is refocusing immediately prior to the next RF pulse, thus increasing the relative dependence of signal strength on T2.

See also Ultrafast Gradient Echo Sequence.
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Rotating Delivery of Excitation OffresonanceInfoSheet: - Sequences - 
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(RODEO) The software package Spiral RODEO™ MRI (including a patented fat and ductal tissue suppression technology), developed from Aurora Imaging Technology Inc, improves the spatial resolution and sensitivity for cancer detection in breast MRI examinations.

See also Aurora® 15T Dedicated Breast MRI System.
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Delay Alternating with Nutation for Tailored ExcitationInfoSheet: - Sequences - 
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(DANTE) A technique used to place a saturation band over e.g. the myocardium. This technique includes spatial modulation of magnetization complementary and delays alternating with nutations for tailored excitation, followed by the application of a cine or real-time imaging. Because the saturated magnetization pattern moves with the atoms of the tissue, the cardiac motion shows up as deformations in the grid pattern in the resulting imaging sequence.
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