Double-echo multislice proton spectroscopic imaging using Hadamard slice encoding
✍ Scribed by Wolfgang Dreher; Dieter Leibfritz
- Publisher
- John Wiley and Sons
- Year
- 1994
- Tongue
- English
- Weight
- 457 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0740-3194
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✦ Synopsis
Abstract
Simultaneous multislice proton spectroscopic imaging (SI) is presented using a pulse sequence with multifrequency selective RF excitation and Hadamard encoding in the slice direction, and conventional Fourier phase encoding in the in‐plane directions. Double‐echo data acquisition is used to increase the spectral information of the experiment. Tests on a phantom demonstrate the quality of the slice selection. Results of in vivo measurements on the healthy rat brain show that spectra with a high signal‐to‐noise ratio can be acquired from four slices within 32 min. The measurements were performed at 4.7 T using a field of view of 32 × 32 mm^2^, a slice thickness of 3 mm, and a voxel size of 12 μl. The proposed method is a useful alternative to sequential multislice SI and 3D SI. Furthermore, it is possible to combine sequential and simultaneous multi‐slice SI.