一文读懂!DWI及ADC值在脑梗死分期的作用

2022-05-28 华夏影像诊断中心 华夏影像诊断中心

脑梗塞患者加权成像显示出不同程度的信号。   

急性、亚急性以及慢性脑梗塞的 DWI 成像各有特点。同时,DWI 显著优于常规的 MRI,其 ADC 值呈现出一定的规律。脑梗塞患者加权成像显示出不同程度的信号。   

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其中急性脑梗塞患者在 T2加权成像上显示出不同程度的高信号,DWI 显示高信号,其病灶范围等于或者大于 T2WI,其 ADC 值低于正常人的 ADC 值,正常脑组织 ADC 值为 0.77×10-3mm2/s。

而亚急性期脑梗塞患者的 T2WI 为高信号,该类患者早期 DWI为高信号, ADC 值降低。

晚期脑梗塞患者为等信号或低信号, ADC 值趋于正常。

慢性期T2WI 为高信号, DWI 为低信号, ADC 值升高。

同时,也可以利用ADC值预估梗死分期:

急性期:ADC值小于0.55×10-3mm2/s;

亚急性期:ADC值(0.56—0.77)×10-3mm2/s;

慢性期:ADC值大于0.80×10-3mm2/s。

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    2022-05-30 ms3000002046518395

    学习

    0

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    2022-05-30 hyf028
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    2022-05-30 karmond
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    2022-05-30 周虎
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    2022-05-29 ms6000001791212108

    学习了

    0

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    2022-05-29 2022.4

    学习了

    0

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