id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-017031-i10q2569	Brix, Gunnar	Basics of Magnetic Resonance Imaging and Magnetic Resonance Spectroscopy	2008		.txt	text/plain	81282	4018	51	The signal increase realized by low-flip angle excitation in combination with short repetition times is obtained, however, by omitting the 180° pulse generating a spinecho, as the 180° pulse not only inverts the phase of the transverse magnetization, but also the longitudinal magnetization (see Fig. 2 In contrast to the conventional imaging sequences, the nomenclature of the GRE sequences is not unified, but is handled differently by different manufacturers. If the flip angle is increased, the T1 contrast maximum will shift to a higher TR value dient of the FLASH sequence, refocusing gradient pulses are introduced in slice-selection direction as well as in the direction of frequency and phase encoding, through which the transverse magnetization is not destroyed after the data acquisition of the MR signal, but rather rephased or refocused (Fig. 2.4 .21).	./cache/cord-017031-i10q2569.txt	./txt/cord-017031-i10q2569.txt