Woodring J H
Department of Diagnostic Radiology, University of Kentucky Medical Center, Lexington 40536-0084.
Radiology. 1991 Apr;179(1):115-22. doi: 10.1148/radiology.179.1.2006261.
The pulmonary artery-bronchus ratio (ABR), defined as the external diameter of a pulmonary artery divided by the external diameter of its accompanying bronchus, was measured in the upper and lower lung zones on frontal chest radiographs in the following groups of subjects: erect healthy subjects, erect subjects with pulmonary vascular plethora, erect subjects with clinical evidence of decompensated left-sided congestive heart failure (CHF), supine normal subjects, and supine subjects with clinical evidence of decompensated CHF. Characteristic vascular patterns were found in each group. The positive predictive value of an abnormal vascular pattern determined by means of changes in the ABR on the erect chest radiograph was 100%, with the negative predictive value of a normal pattern being 97%. The erect chest radiograph was 93% accurate in distinguishing between plethora and CHF. The positive predictive value of an abnormal vascular pattern on the supine chest radiograph was 100%, with the negative predictive value of a normal vascular pattern being 97%. Measurements of ABR can be a helpful adjunct to the interpretation of supine and erect chest radiographs.
肺动脉-支气管比率（ABR）定义为肺动脉外径除以其伴行支气管的外径，在以下几组受试者的胸部正位X线片上测量上、下肺区的该比率：直立位健康受试者、直立位肺血管增多的受试者、有失代偿性左侧充血性心力衰竭（CHF）临床证据的直立位受试者、仰卧位正常受试者以及有失代偿性CHF临床证据的仰卧位受试者。在每组中均发现了特征性的血管模式。通过直立位胸部X线片上ABR变化确定的异常血管模式的阳性预测值为100%，正常模式的阴性预测值为97%。直立位胸部X线片在区分肺血增多和CHF方面的准确率为93%。仰卧位胸部X线片上异常血管模式的阳性预测值为100%，正常血管模式的阴性预测值为97%。ABR的测量有助于对仰卧位和直立位胸部X线片的解读。
