超声引导经皮穿刺肾囊肿硬化治疗3例，囊肿抽吸与硬化过程中，实时双平面成像观察囊肿大小的变化情况及针尖与囊肿腔的空间位置关系，确保针尖始终位于囊肿腔中；

During treatments of 3 renal cysts the changes of cysts and the spatial relations between needle tips and renal cysts were observed to confirm that the needle tips were always in the cysts.

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