The aim of this case report is to mphases the importance of careful investigation of ulmonary perfusion scan uncoupled with ventilation tudy.

• 此病例指出在无肺通气检查相辅的情形下，对于肺灌注造影的阳性判读时需多加注意，特别在自体免疫性疾患的患者时尤须更加仔细。