MRI-based reference range for the renal pelvis anterior-posterior diameter in children ages 0-19 years

Anthony J. Schaeffer, Michael P. Kurtz, Tanya Logvinenko, Michael T. McCartin, Sanjay P. Prabhu, Caleb P. Nelson, Jeanne S. Chow*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Objective: To determine the mean and normal range of anteroposterior diameter (APD) of the renal pelves in children. Methods: Patients aged 0-19 years with normal spinal MRIs were identified after institutional review board approval. Those with dilating uropathy or abdominal surgery/radiation were excluded. The maximum APD was measured. A mixed linear model was fit to determine the relationship between APD and age, adjusted for bladder distention. The left and right kidneys were treated independently. Results: 283 left and 285 right renal units were included. For the left, a 3.5% increase in APD per year was predicted (p,0.0001), with the average APD for infants and 18-year olds with non-distended bladders being 2.5mm (95th percentile: 7.2mm) and 4.6mm (13.4 mm), respectively. For the right, a 3.9% increase in APD per year was predicted (p,0.0001), with the average APD for infants and 18-year olds with non-distended bladders being 2.8mm (8.4mm) and 5.5mm (16.6mm), respectively. Compared with a non-distended bladder, a distended bladder increased the predicted APD between 23% (right) and 38% (left) (p50.01 and p,0.0001, respectively). Conclusion: The mean and normal ranges of APD measured by MRI in children are provided. APD increases with age and bladder distension and is greater on the left.

Original languageEnglish (US)
Article number20160211
JournalBritish Journal of Radiology
Volume89
Issue number1067
DOIs
StatePublished - 2016

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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