Snapshot MRI with T2*-weighted magnetization preparation

✍ Scribed by Peter Bendel

• Book ID: 102533267
• Publisher: John Wiley and Sons
• Year: 1993
• Tongue: English
• Weight: 472 KB
• Volume: 30
• Category: Article
• ISSN: 0740-3194
• DOI: 10.1002/mrm.1910300320

✦ Synopsis

Abstract

A method for encoding T~2~*‐dependent contrasts into the preparation period of magnetization‐prepared uitrafast MRI sequences is demonstrated and validated. The preparation block consists of a 90°—T—90°~p~ sequence, where p is shifted by 90° for successive images. By adding two such successive images in quadrature, a combined image is obtained, in which the pixel intensities depend on the incoherent intravoxel dephasing that occurred during T in a way that is similar to the dependence on TE in a gradient‐echo sequence. The method could therefore be useful for applications that require very short repetition times for good temporal resolution, together with detection of T~2~*‐weighted contrasts, such as functional MRI in the brain.