High Speed1H Spectroscopic Imaging in Human Brain by Echo Planar Spatial‐Spectral Encoding
作者:
Stefan Posse,
Gioacchino Tedeschi,
Robert Risinger,
Robert Ogg,
Denis Le Bihan,
期刊:
Magnetic Resonance in Medicine
(WILEY Available online 1995)
卷期:
Volume 33,
issue 1
页码: 34-40
ISSN:0740-3194
年代: 1995
DOI:10.1002/mrm.1910330106
出版商: Wiley Subscription Services, Inc., A Wiley Company
关键词: proton spectroscopy;spectroscopic imaging;echo planar encoding;human brain
数据来源: WILEY
摘要:
AbstractWe introduce a fast and robust spatial‐spectral encoding method, which enables acquisition of high resolution short echo time (13 ms) proton spectroscopic images from human brain with acquisition times as short as 64 s when using surface coils. The encoding scheme, which was implemented on a clinical 1.5 Tesla whole body scanner, is a modification of an echo‐planar spectroscopic imaging method originally proposed by MansfieldMagn. Reson. Med.1, 370–386 (1984), and utilizes a series of read‐out gradients to simultaneously encode spatial and spectral information. Superficial lipid signals are suppressed by a novel double outer volume suppression along the contours of the brain. The spectral resolution and the signal‐to‐noise per unit time and unit volume from resonances such as N‐acetyl aspartate, choline, creatine, and inositol are comparable with those obtained with conventional methods. The short encoding time of this technique enhances the flexibility ofin vivospectroscopic imaging by reducing motion artifacts and allowing acquisition of multiple data sets with different param
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