来自《耶鲁大学开放课程：生物医学工程探索 第21集 第21集》
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in that there is an instrument with a--在那里 会有这样的一个 -
basically a big cylinder它是一个大的圆柱体 -
with a cylindrical hole in the middle.中间有个圆柱形的孔 -
This hole, this is where the patient is going to go,这个孔就是病人要呆的地方 -
the patient will be lying on this cart,病人将躺在这个推车上 -
and this will act like a conveyor belt它就好像一个传送带 -
that will move the patient inside the cylinder.将病人移动到这个圆柱体里 -
It's close-fitting, you don't want the size of the cylinder两者离得很近 你不会希望圆柱体 -
to be too far away from the patient距离病人太远 -
because you want the magnetic field forces因为你希望磁场和 -
and the radio waves that are emitted by the ions in your--病人体内离子或原子释放出的电磁波 -
by the atoms in your body to be very close离检测器尽量近一些