Book Chapter10.1007/978-1-4471-1410-9_3
Functional Imaging Using NMR
R. Bachus,E. Mueller,H. Koenig,G. Braeckle,H. Weber,Erich R Reinhardt +5 more
- 01 Jan 1987
- pp 43-60
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TL;DR: In this paper, the effect of the echo time on the image contrast is demonstrated by the multi-echo images shown in Fig. 3.1 and the significant change in image contrast with increasing echo time is clearly demonstrated.
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Abstract: The signal intensity and contrast of NMR images depend both on measurement parameters and on tissue parameters. The most essential measurement parameters are the repetition time TR and the spin echo time TE. The effect of the echo time on the image contrast is demonstrated by the multi echo images shown in Fig. 3.1. The significant change in image contrast with increasing echo time is clearly demonstrated. The tissue specific parameters are the relaxation times T1 and T2, the proton density P and the diffusion coefficient D. Furthermore, the signal intensity in vessels is also fundamentally influenced by the flow velocity of the blood (see below). By applying chemical shift imaging methods, it is also possible to generate separate images of fat, water and magnetic susceptibility.
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References
Spin diffusion measurements : spin echoes in the presence of a time-dependent field gradient
E. O. Stejskal,J. E. Tanner +1 more
TL;DR: In this article, a derivation of the effect of a time-dependent magnetic field gradient on the spin-echo experiment, particularly in the presence of spin diffusion, is given.
Simple proton spectroscopic imaging.
TL;DR: Simple modification of a spin echo imaging pulse sequence generates useful spectroscopic information at 0.35 T and provides new parameters for tissue characterization and improved contrast between some organs.
2.3K
Selective Saturation Nmr Imaging
TL;DR: Lactate was investigated because of its importance in the pathophysiology of ischemic insult and with the favorable NMR characteristics of the methyl protons of lactate, this technique may play an important role in the noninvasive evaluation of tissue ischemia using 1H NMR.
154
Idiopathic pulmonary ossification.
TL;DR: Idiopathic pulmonary ossification is an uncommon and asymptomatic disorder of unknown etiology in which trabeculated bone is found in the lung in which the lungs demonstrate widespread involvement.
39
Quantification of pulsatile flow in MRI by an analysis of T2 changes in ECG‐gated multiecho experiments
TL;DR: The transport of magnetization by fluid flow through thin slices in MRI causes changes in the measured T2 relaxation time, which is used to compute velocity values at several different times relative to the cardiac cycle using data in ECG‐gated multiecho experiments which last a few minutes.
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