【名词&注释】
纤维化(fibrosis)、急性呼吸衰竭(acute respiratory failure)、主要因素(main factors)、右心室(right ventricle)、慢性肺脓肿(chronic lung abscess)、肺动脉干(pulmonary trunk)、右下肺动脉(right inferior pulmonary artery)、严重肺结核(severe pulmonary tuberculosis)
[单选题]下列关于诊断慢性肺源性心脏病时胸部X线下所见的描述中,错误的是:()
A. 右下肺动脉(right inferior pulmonary artery)干(pulmonary trunk)扩张,其横径≥15mm
B. 右下肺动脉(right inferior pulmonary artery)干(pulmonary trunk)横径与气管横径比≥1.07
C. 肺动脉段明显突出或其高度≥3mm
D. 右心室增大
E. 心脏向左下扩大