The focuses of 22 cases showed low density, 3 cases of slightly high density shade in low density shadow.
病灶为单纯低密度22例，病灶密度以低密度为主，其内见稍高密度影3例，所有病例均无钙化。
Curved high-density shadow was found at the bottom of both lungs under the pleura.
胸膜下两肺底部可见弧形的高密度阴影。
Curved high-density shadow was found at the bottom of both lungs under the pleura.
胸膜下两肺底部可见弧形的高密度阴影。
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