Importance The dose of supplemental vitamin D needed in infants born with serum 25-hydroxyvitamin D (25D) concentrations less than 50 nmol/L (ie, 20 ng/mL) is unclear. Effect of Vitamin D Supplementation on Bone Mass in Infants With 25-Hydroxyvitamin D Concentrations Less Than 50 nmol/L: A Prespecified Secondary Analysis of a Randomized Clinical Trial. Gharibeh N, Razaghi M, Vanstone CA, et al. Pediatric radiation dose and risk from bone density measurements using a GE Lunar Prodigy scanner. Effective dose of dual-energy X-ray absorptiometry scans in children as a function of age. Thomas SR, Kalkwarf HJ, Buckley DD, Heubi JE. Dual energy X-ray absorptiometry (DEXA) measurements of bone density and body composition: promise and pitfalls. Wouldn't that be enough radiation exposure?ġ.ěachrach LK. in the study, each infant had 4 DEXA examinations. the estimated lifetime cancer risks were negligible with the use of the DEXA exam, i.e., 0.02-0.25 per million, but the risk depends on the age, type of DEXA, and total cumulative dose. described that the effective dose values for a lumbar spine scan performed in fast array mode for a 1-year-old were 4.7 microSv compared to 2.2 microSv in an adult with an individual dose limit of 10 microSv/yr classified as safe. The effective dose of DEXA scans decreases as age increases. Also, the fat mass adjacent to the bone could influence the measurement of bone mineral content. Infants have different body compositions meaning their fat % and fat-free mass are not distributed uniformly. Bone mineral content may be underestimated in smaller children. Shared Decision Making and Communicationĭual-energy X-ray absorptiometry (DEXA) measurements have some limitations in the pediatric population.Scientific Discovery and the Future of Medicine.Health Care Economics, Insurance, Payment.Clinical Implications of Basic Neuroscience.Challenges in Clinical Electrocardiography.
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