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FIG 1. Enlarged metastatic cervical node from NPC. Color Doppler sonogram shows increased central and peripheral intranodal vascularity. Red indicates flow toward the transducer, blue indicates flow away from the transducer.
FIG 2. Same node as in figure 1, 8 weeks after completion of RT. The node remains enlarged, but color Doppler sonogram shows a reduction in the intranodal vascularity. Red indicates flow toward the transducer, blue indicates flow away from the transducer.
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