当对人体组织施加一个强磁场时，原子核的磁旋就会排列整齐，这就能生成一个强度足以让天线探测到的信号。

When a powerful magnetic field is applied to the tissue, the nuclei's magnetic spins align, generating a signal strong enough for an antenna to detect.

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MRI是将患者置于某一强磁场中，该磁场可让患者机体原子核（其运动类似于磁化的陀螺）顺着磁场方向排列。

In MRI, the patient is placed in a strong magnetic field that causes some of his body's atomic nuclei, which act like tiny magnetised spinning tops, to align themselves with the field.

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可以看到细胞核和平等排列的心肌纤维，心肌纤维间的线形粉红色条纹为闰盘。

Note the central nuclei and the syncytial arrangement of the fibers, some of which have pale pink intercalated disks.

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