MRA used 3 dimensional time of flight method and demonstrated the intra cranial arteries with the maximum intensity projection (MIP) of the source images.

MRA 检查采用三维时间飞跃法，对源图像做最大强度投影重建血管影像。

youdao

In addition, the ion energy of HPIB is also measured with Thomson spectrometer and time of flight method and the results agree with those measured with a pile of thin films.

还将叠片法的测量结果与利用磁谱仪和采用飞行时间法等的测量结果进行了比较，三种方法所得的测量结果基本一致。

youdao

Since the flight test data are of time domain, it needs to be converted into frequency domain by FFT method. Then it can be used to identify the system.

由于飞行试验数据是时域数据，使用这种方法需要使用FFT的方法将实测的时域数据转换成频域数据后再进行辨识。

youdao