Abstract
Signal intensity in magnetic resonance imaging (MRI) is described by the solution to the Bloch equations. Image behavior is calculated for the variable-angle gradient refocusing and conventional spin-echo techniques. It is found that by proper manipulation of the excitation angle (and echo time in spin-echo sequences), the imaging time can be reduced up to twentyfold for the gradient refocusing technique and fourfold for the conventional spin-echo imaging. The contrast obtained is comparable to that acquired in conventional MRI. Imaging experiments performed on phantoms and human heads are in good agreement with theoretical results.
Original language | English (US) |
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Pages (from-to) | 1110-1115 |
Number of pages | 6 |
Journal | IEEE Transactions on Nuclear Science |
Volume | NS-34 |
Issue number | 5 |
State | Published - 1800 |
Externally published | Yes |
ASJC Scopus subject areas
- Nuclear Energy and Engineering
- Electrical and Electronic Engineering