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[主观题]
肺灌注显像前后位像双肺轮廓主要由左肺______________叶、右肺______________叶和______________
叶构成。______________肺影像大于______________肺。双肺中问空白区为______________及______________影,左肺下野大部被______________占据,呈与左心形状一致的显像剂分布减低区,肺底与膈肌水平一致,受呼吸运动的影响而稍欠整齐。分肺血流定量分析示左肺为______________%,右肺为______________%。
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