MAGNETIC RESONANCE METHOD USING A PHASE-MODULATED PULSE TRAIN WITH A CONSTANT SMALL FLIP ANGLE

Bernhard Blümich (Inventor), MARCUS GREFERATH (Inventor), EIMEAR BYRNE (Inventor), QINGXIA GONG (Inventor)

Research output: Patent

Abstract

A method for performing magnetic resonance measurements on a sample includes applying a first predetermined number of pulse trains for excitation, each pulse train having a constant amplitude and including a second predetermined number of pulses spaced by a predetermined time interval. The pulse trains are modulated by a bent function. After each pulse, data is sampled. Preferably a square number of pulses is generated being constant in power, and the Walsh transform of the sequence of their phases is constant in power, so that the power of the excitation in time and frequency domain is constant. The method can reduce power requirements and may permit undercutting specific absorption rate (SAR) limits due to the small excitation power necessary to create time signals with reasonable signal to noise ratio.

Original languageEnglish
Patent numberUS2011241667
IPCG01R 33/ 44 A I
Priority date08/10/2009
Publication statusPublished - 6 Oct 2011
MoE publication typeH1 Granted patent

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