TY - JOUR
T1 - MRI-based reference range for the renal pelvis anterior-posterior diameter in children ages 0-19 years
AU - Schaeffer, Anthony J.
AU - Kurtz, Michael P.
AU - Logvinenko, Tanya
AU - McCartin, Michael T.
AU - Prabhu, Sanjay P.
AU - Nelson, Caleb P.
AU - Chow, Jeanne S.
N1 - Funding Information:
Dr Nelson is supported by grant K23-DK088943 from the NIDDK.
PY - 2016
Y1 - 2016
N2 - 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.
AB - 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.
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U2 - 10.1259/bjr.20160211
DO - 10.1259/bjr.20160211
M3 - Article
C2 - 27610649
AN - SCOPUS:84994130243
SN - 0007-1285
VL - 89
JO - British Journal of Radiology
JF - British Journal of Radiology
IS - 1067
M1 - 20160211
ER -