Thoracic X-ray of 61.5% patients showed typical image, with low density tuberous and globular nidus in the cavity surrounded with semicircle or crescent vacuoles.

• 61.；5%25患者显示较典型的X线征像，表现为空洞内低密度结节状或球形病灶，围以半环形气带或新月形气腔；