膕静脉可见弱回声充填
It is observed that the popliteal vein is filled with weak echoes.
OR
It is observed that there are weak echoes coming from the popliteal vein.

弱回声: weak echo
充填: filled
膕静脉: popliteal vein
股: should be referring to 股骨槽 (femoral groove); femoral groove is shallow (浅)





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Note added at 5 hrs (2011-01-27 03:38:17 GMT)
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Upon further reading of the text, 股浅 indeed refers to the superficial femoral vein (股浅静脉).

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Note added at 5 hrs (2011-01-27 03:40:50 GMT)
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AFAIK, hypoechoic is 低回声, while 弱回声 is weak echo.