TY - JOUR
T1 - Changes in brain water diffusion during the 1st year of life
AU - Forbes, Kirsten P.N.
AU - Pipe, James G.
AU - Bird, C. Roger
PY - 2002/1/1
Y1 - 2002/1/1
N2 - PURPOSE: To evaluate the normal water diffusion changes that occur during the 1st year of life. MATERIALS AND METHODS: Diffusion-weighted imaging was performed in 40 subjects (age range, birth to 1 year) in whom both magnetic resonance imaging and neurologic assessment results were normal at the time of imaging and, where available, at follow-up. Apparent diffusion coefficient (ADC) was calculated in four areas of white matter (anterior and posterior subcortical and internal capsule) and four of gray matter (cortex, thalamus, head of the caudate nucleus, and lentiform nucleus). Linear regression was used to examine the effect of age on ADC, and analysis of variance was used to compare ADC within different brain regions. RESULTS: ADC decreased with age in all regions (P < .01). Data best fit with a logarithmic decline (r2 = 0.20-0.63). ADC was significantly higher in white (113 x 10-5 mm2/sec) than in gray matter (102 x 10-5 mm2/sec; P < .001). Significant differences were seen among three white matter regions (subcortical, 188 x 10-5 mm2/sec at birth; anterior limb of internal capsule, 130 x 10-5 mm2/sec; posterior limb of internal capsule, 109 x 10-5 mm2/sec) and three gray matter regions (cortex, 134 x 10-5 mm2/sec at birth; head of caudate nucleus, 134 x 10-5 mm2/sec at birth; and thalamus and lentiform nucleus, 120 x 10-5 mm2/sec; P < .01). CONCLUSION: Results suggest that in neonates and infants, water diffusion is highly dependent on both subject age and brain location.
AB - PURPOSE: To evaluate the normal water diffusion changes that occur during the 1st year of life. MATERIALS AND METHODS: Diffusion-weighted imaging was performed in 40 subjects (age range, birth to 1 year) in whom both magnetic resonance imaging and neurologic assessment results were normal at the time of imaging and, where available, at follow-up. Apparent diffusion coefficient (ADC) was calculated in four areas of white matter (anterior and posterior subcortical and internal capsule) and four of gray matter (cortex, thalamus, head of the caudate nucleus, and lentiform nucleus). Linear regression was used to examine the effect of age on ADC, and analysis of variance was used to compare ADC within different brain regions. RESULTS: ADC decreased with age in all regions (P < .01). Data best fit with a logarithmic decline (r2 = 0.20-0.63). ADC was significantly higher in white (113 x 10-5 mm2/sec) than in gray matter (102 x 10-5 mm2/sec; P < .001). Significant differences were seen among three white matter regions (subcortical, 188 x 10-5 mm2/sec at birth; anterior limb of internal capsule, 130 x 10-5 mm2/sec; posterior limb of internal capsule, 109 x 10-5 mm2/sec) and three gray matter regions (cortex, 134 x 10-5 mm2/sec at birth; head of caudate nucleus, 134 x 10-5 mm2/sec at birth; and thalamus and lentiform nucleus, 120 x 10-5 mm2/sec; P < .01). CONCLUSION: Results suggest that in neonates and infants, water diffusion is highly dependent on both subject age and brain location.
KW - Brain, MR
KW - Brain, diffusion
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U2 - 10.1148/radiol.2222010179
DO - 10.1148/radiol.2222010179
M3 - Article
C2 - 11818606
AN - SCOPUS:0036151638
VL - 222
SP - 405
EP - 409
JO - Radiology
JF - Radiology
SN - 0033-8419
IS - 2
ER -