in patients with cardiomegaly the mean ( +/- sem ) l/r peak count ratio at cardiac apex , mid-heart , and aortic arch was 0.46 ( +/- 0.08 ) , 0.55 ( +/- 0.07 ) , and 0.89 ( +/- 0.08 ) when supine and 1.04 ( +/- 0.07 ) , 1.05 ( +/- 0.05 ) , and 1.08 ( +/- 0.07 ) when prone , respectively .
C0018800
cardiomegaly
C0018787
heart