the pa and ap plain chest films of children of all age groups with ductus arteriosus persistens ( dap ) ( n = 91 ) , atrial septal defect ( asd ) ( n = 86 ) , ventricular septal defect ( vsd ) ( n = 87 ) and a normal control group ( n = 387 ) were used to measure the size of the aortic arch , and an aortic index ( ai ) was calculated from aortic arch size and the height of the eighth thoracic vertebral body .
C0817096
chest
C0018818
ventricular septal defect