万灵丹
发表于 2025-3-26 23:45:21
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吞吞吐吐
发表于 2025-3-27 03:36:24
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MANIA
发表于 2025-3-27 07:47:24
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nugatory
发表于 2025-3-27 13:13:53
The Spin-echo Pulse Sequence,hestrating different instruments, the MRI pulse sequence diagram (Figure 4.1) describes the different operations that must occur to generate and collect image data: RF pulses, gradient manipulations, and signal measurement.
针叶
发表于 2025-3-27 17:15:58
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退潮
发表于 2025-3-27 20:36:02
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Regurgitation
发表于 2025-3-28 00:00:58
Tissue Relaxation,of longitudinal magnetization (T1) and loss of transverse magnetization (T2) after a radiofrequency (RF) pulse flips magnetization out of alignment with the externally applied static magnetic field, B..
MEET
发表于 2025-3-28 05:27:24
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书法
发表于 2025-3-28 09:17:52
Gradient Echo Sequences and 3D Imaging,°) remains along the direction of B., so little time is needed to let the longitudinal magnetization recover along B. before beginning the next repetition of the pulse sequence in gradient-echo imaging. This means that TR, the time between successive repetitions of the pulse sequence, can be made mu
Fortuitous
发表于 2025-3-28 13:15:00
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