Mitigate
发表于 2025-3-30 11:07:05
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Accede
发表于 2025-3-30 16:25:05
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Curmudgeon
发表于 2025-3-30 20:04:50
https://doi.org/10.1007/978-3-540-70609-0contained within . and . (Fig.3.1). Hydrogen is one of a number of elements whose nuclei exhibit magnetic resonance properties, but the high intrinsic sensitivity and natural abundance in the form of water and lipid molecules makes it particularly favorable for imaging. Other nuclei of potential int
Individual
发表于 2025-3-30 21:04:43
https://doi.org/10.1007/978-3-540-70609-0 there are two distinct relaxation processes that relate to the two components of the Net Magnetization, the longitudinal (.) and transverse (.) components. The first . process, commonly referred to as ., is responsible for the regrowth of the z component along the longitudinal (z) axis to its origi
N斯巴达人
发表于 2025-3-31 04:39:44
https://doi.org/10.1007/978-3-540-70609-0n is introduced by using the gradient coils described in to generate magnetic field gradients. When a gradient is applied in a particular direction, this causes the strength of the magnetic field and hence, the Larmor frequency to depend on position along that direction. MR echoes that are generated
cultivated
发表于 2025-3-31 07:09:34
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aquatic
发表于 2025-3-31 11:06:06
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Negligible
发表于 2025-3-31 15:42:39
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寄生虫
发表于 2025-3-31 21:02:52
https://doi.org/10.1007/978-3-642-30696-9tive to the background noise (SNR) depends on a number of . including the magnetic field strength, the choice of receiver coil and system electronics, as well as . including the field of view, image acquisition matrix size and slice thickness (defining the voxel volume), the number of signal samples
Encephalitis
发表于 2025-4-1 01:19:13
https://doi.org/10.1007/978-3-642-30696-9Gradient Echo and Spin Echo pulse sequences (Fig. 11.1). In the case of spin echo, a 180° refocusing pulse is applied at a time equal to half the echo time. This reverses the effect of the field inhomogeneities and the amplitude of the transverse magnetization at the echo times dependent on the pure