...发射MR旌旗灯号的氢原子核脱离接收规模以外,以是测不到MR旌旗灯号,在T1WI或者T2WI中均呈黑影,这就是流空效应(flowing Void)。这一效应使心腔和血管显影,是CT所不克不及相比的。
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flowing void effect 流空效应
The slopes of the reverse-pitched-roof prevents external contamination by blocking the rainwater flowing outwards from the two masses, and collecting them into the in-between void space.
反向坡屋顶的形式通过阻挡雨水流入两个建筑体块间的室外区域,避免了室外空间的污染。建筑雨水则收集在中心并集中排出去。
In cases of vascular malformation, the presence of a signal void caused by vascular structures containing flowing blood is a clue to the diagnosis.
在血管畸形的影像中,由于流空效应产生的影像是诊断的一个线索。
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