Computed tomographic lung density in children.

摘要: The effects of patient age, anatomic level, anteroposterior location, and phase respiration on pulmonary density were analyzed retrospectively in 33 children prospectively 13 children. Density standards positioned the chest wall for correction scanner performance changes. subgroup 32 over 7 years ie, with respiratory cooperation, was separately using moderate inspiration; its mean lung (MLD) three levels -792 HU (95% range, -702-882 HU). Although MLD decreased increasing a significant linear regression found only prospective subgroup. Densities apical, subcarinal, basal not different. From maximal expiration to inspiration, by 158 studied prospectively. Anteroposterior gradients averaged 56 at subcarinal level increased expiration.