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. 2016 Feb 5;6:1007–1015. doi: 10.1016/j.dib.2016.01.064

Delayed early developmental trajectories of white matter tracts of functional pathways in preterm-born infants: Longitudinal diffusion tensor imaging data

Linda Chang a, Kentaro Akazawa b, Robyn Yamakawa a, Sara Hayama a, Steven Buchthal a, Daniel Alicata a, Tamara Andres a, Deborrah Castillo a, Kumiko Oishi c, Jon Skranes d, Thomas Ernst a, Kenichi Oishi b,
PMCID: PMC4763104  PMID: 26958632

Abstract

Probabilistic maps of white matter pathways related to motor, somatosensory, auditory, visual, and limbic functions, and major white matter tracts (the corpus callosum, the inferior fronto-occipital fasciculus, and the middle cerebellar peduncle) were applied to evaluate the developmental trajectories of these tracts, using longitudinal diffusion tensor imaging (DTI) obtained in term-born and preterm-born healthy infants. Nineteen term-born and 30 preterm-born infants completed MR scans at three time points: Time-point 1, 41.6±2.7 postmenstrual weeks; Time-point 2, 46.0±2.9 postmenstrual weeks; and Time-point 3, 50.8±3.7 postmenstrual weeks. The DTI-derived scalar values (fractional anisotropy, eigenvalues, and radial diffusivity) of the three time points are available in this Data article.

Keywords: Term, Preterm, Infant, Diffusion tensor imaging, Atlas


Specifications Table

Subject area Biology
More specific subject area Developmental Medicine, Neonatology
Type of data Table
How data was acquired MRI: 3.0 Tesla Siemens TIM Trio scanner (Siemens Medical Solutions, Erlangen, Germany)
Data format Analyze
Experimental factors The diffusion tensor was calculated using DtiStudio. Each image was transformed to the JHU-neonate atlas using dual-channel large deformation diffeomorphic metric mapping.
Experimental features DTIs of 19 term-born and 30 preterm-born healthy infants were acquired at three time points.
Data source location Queen’s Medical Center, University of Hawaii, Honolulu, Hawaii, USA
Data accessibility Data is within this article.

Value of the data

  • The data demonstrated in this paper can be used as a reference for future research related to early brain development.

  • The dataset from healthy term-born infants can be used as a control for future disease-oriented studies.

  • The data can be used a benchmark to evaluate other image analysis methods.

1. Data

The fractional anisotropy (FA) (Table 1), the first eigenvalue (e0) (Table 2), the second eigenvalue (e1) (Table 3), the third eigenvalue (e2) (Table 4), and the radial diffusivity (Table 5) of each white matter pathway [1] at each time point demonstrated the differences between term- and preterm-born groups. Results were sorted by the group effect from lower to higher p-values. Note: the group effect was not calculated when the effect of group*timepoint was significant (p<0.05). AR=acoustic radiation, BCC=body of the corpus callosum, CG=cingulum, CST=corticospinal tract, GCC=genu of the corpus callosum, IFO=inferior fronto-occipital fasciculus, ILF=the inferior longitudinal fasciculus, Lt.=left, MCP=middle cerebellar peduncle, OR=optic radiation, PMC=primary motor cortex, PSC=primary somatosensory cortex, Rt.=right, SCC=splenium of the corpus callosum, Thal=thalamus, UNC=the uncinate fasciculus, V1-V4=the pathway that connects the V1/V2 and the V4, and V1-MT=the pathway that connects the V1/V2 and the V5/MT+.

Table 1.

Corrected fractional anisotropy (FA) values of each time point and the difference between term- and preterm-born groups. Results are sorted by the group effect from lower to higher p-value.

Corrected FA; mean (range)
Group effect (p)
Time point 1 Time point 2 Time point 3
GCC term 0.255(0.224–0.293) 0.284(0.263–0.319) 0.293(0.254–0.335) 0.138
preterm 0.236(0.170–0.284) 0.262(0.174–0.298) 0.289(0.236–0.337)
Rt.Thal-PSC term 0.252(0.222–0.301) 0.278(0.245–0.311) 0.292(0.260–0.342) 0.170
preterm 0.255(0.232–0.281) 0.279(0.253–0.314) 0.302(0.264–0.341)
Lt.V1-V4 term 0.093(0.075–0.112) 0.102(0.074–0.124) 0.111(0.077–0.137) 0.486
preterm 0.099(0.085–0.122) 0.110(0.090–0.144) 0.120(0.087–0.153)
Rt.ILF term 0.199(0.171–0.229) 0.230(0.184–0.268) 0.241(0.209–0.272) 1.000
preterm 0.188(0.151–0.229) 0.212(0.166–0.265) 0.241(0.198–0.286)
Rt.AR term 0.258(0.235–0.284) 0.280(0.262–0.297) 0.291(0.249–0.332) 1.000
preterm 0.250(0.220–0.279) 0.273(0.248–0.300) 0.289(0.262–0.328)
Rt.UNC term 0.209(0.192–0.227) 0.238(0.210–0.261) 0.248(0.218–0.287) 1.000
preterm 0.204(0.160–0.246) 0.227(0.174–0.260) 0.249(0.195–0.274)
Rt.IFO term 0.219(0.195–0.258) 0.237(0.208–0.270) 0.246(0.217–0.285) 1.000
preterm 0.211(0.175–0.258) 0.231(0.199–0.266) 0.245(0.213–0.281)
Lt.UNC term 0.208(0.182–0.237) 0.233(0.206–0.275) 0.247(0.221–0.270) 1.000
preterm 0.198(0.164–0.237) 0.225(0.189–0.268) 0.250(0.212–0.284)
BCC term 0.254(0.196–0.312) 0.271(0.228–0.321) 0.284(0.231–0.344) 1.000
preterm 0.243(0.195–0.290) 0.261(0.214–0.328) 0.281(0.212–0.361)
Lt.Thal-PSC term 0.230(0.215–0.264) 0.255(0.225–0.280) 0.271(0.239–0.307) 1.000
preterm 0.235(0.211–0.259) 0.253(0.234–0.289) 0.279(0.251–0.319)
Lt.ILF term 0.210(0.179–0.230) 0.247(0.213–0.267) 0.251(0.202–0.282) 1.000
preterm 0.197(0.152–0.231) 0.229(0.181–0.278) 0.248(0.198–0.299)
Rt.CST term 0.358(0.306–0.399) 0.385(0.329–0.477) 0.410(0.350–0.472) 1.000
preterm 0.351(0.286–0.401) 0.387(0.316–0.442) 0.423(0.327–0.475)
MCP term 0.259(0.220–0.306) 0.297(0.249–0.358) 0.322(0.270–0.365) 1.000
preterm 0.260(0.198–0.302) 0.297(0.263–0.335) 0.332(0.295–0.399)
Rt.Premotor-PMC term 0.147(0.120–0.167) 0.165(0.137–0.186) 0.174(0.139–0.212) 1.000
preterm 0.145(0.122–0.182) 0.164(0.144–0.195) 0.181(0.145–0.216)
Rt.V1-V4 term 0.113(0.086–0.130) 0.128(0.099–0.155) 0.136(0.101–0.170) 1.000
preterm 0.113(0.088–0.135) 0.128(0.099–0.157) 0.138(0.098–0.167)
Lt.OR term 0.302(0.276–0.375) 0.327(0.275–0.371) 0.349(0.315–0.385) 1.000
preterm 0.299(0.254–0.348) 0.322(0.286–0.373) 0.350(0.303–0.420)
Lt.IFO term 0.239(0.220–0.302) 0.256(0.211–0.294) 0.259(0.228–0.295) 1.000
preterm 0.235(0.190–0.282) 0.251(0.203–0.285) 0.263(0.230–0.320)
Rt.CG term 0.159(0.131–0.213) 0.163(0.134–0.210) 0.181(0.150–0.206) 1.000
preterm 0.158(0.090–0.208) 0.163(0.110–0.223) 0.184(0.139–0.229)
Rt.V1 -MT term 0.134(0.109–0.168) 0.160(0.131–0.193) 0.169(0.124–0.267) 1.000
preterm 0.139(0.116–0.170) 0.155(0.122–0.228) 0.167(0.117–0.227)
Rt.OR term 0.270(0.241–0.315) 0.299(0.269–0.321) 0.306(0.261–0.335) 1.000
preterm 0.266(0.222–0.320) 0.293(0.237–0.352) 0.315(0.256–0.369)
Lt.CG term 0.172(0.121–0.209) 0.183(0.155–0.222) 0.193(0.147–0.247) 1.000
preterm 0.171(0.116–0.224) 0.179(0.121–0.217) 0.197(0.144–0.266)
Lt.Premotor-PMC term 0.141(0.125–0.157) 0.160(0.144–0.184) 0.170(0.142–0.209) 1.000
preterm 0.141(0.117–0.170) 0.158(0.138–0.190) 0.173(0.146–0.204)
Lt.V1-MT term 0.112(0.089–0.136) 0.128(0.104–0.162) 0.141(0.121–0.178) 1.000
preterm 0.113(0.093–0.139) 0.127(0.111–0.160) 0.141(0.112–0.191)
Lt.AR term 0.244(0.221–0.269) 0.270(0.252–0.296) 0.280(0.247–0.306)
preterm 0.240(0.214–0.269) 0.257(0.231–0.286) 0.277(0.250–0.314)
SCC term 0.314(0.274–0.357) 0.343(0.305–0.391) 0.369(0.310–0.428)
preterm 0.303(0.255–0.355) 0.332(0.283–0.396) 0.374(0.288–0.481)
Lt.CST term 0.357(0.320–0.386) 0.386(0.352–0.455) 0.408(0.354–0.451)
preterm 0.351(0.303–0.431) 0.384(0.322–0.434) 0.428(0.346–0.472)

Table 2.

Corrected first eigenvalues (e0) of each time point and the difference between term- and preterm-born groups. Results are sorted by the group effect from lower to higher p-value.

Corrected e0; mean (range)
Group effect (p)
Time point 1 Time point 2 Time point 3
BCC term 0.00182(0.00169–0.00201) 0.00181(0.00166–0.00200) 0.00178(0.00165–0.00196) 0.002
preterm 0.00193(0.00176–0.00217) 0.00191(0.00175–0.00213) 0.00187(0.00163–0.00207)
Lt.V1-V4 term 0.00135(0.00123–0.00143) 0.00126(0.00117–0.00139) 0.00119(0.00108–0.00130) 0.033
preterm 0.00142(0.00128–0.00160) 0.00132(0.00114–0.00149) 0.00123(0.00112–0.00137)
Rt.Thal-PSC term 0.00143(0.00138–0.00149) 0.00137(0.00130–0.00143) 0.00132(0.00127–0.00137) 0.046
preterm 0.00147(0.00140–0.00159) 0.00140(0.00131–0.00152) 0.00135(0.00125–0.00144)
Lt.V1-MT term 0.00146(0.00138–0.00155) 0.00139(0.00128–0.00149) 0.00130(0.00120–0.00145) 0.051
preterm 0.00154(0.00142–0.00175) 0.00144(0.00133–0.00158) 0.00134(0.00124–0.00157)
Lt.ILF term 0.00166(0.00159–0.00170) 0.00158(0.00145–0.00166) 0.00149(0.00139–0.00157) 0.102
preterm 0.00170(0.00151–0.00185) 0.00162(0.00144–0.00179) 0.00154(0.00142–0.00176)
Lt.Premotor-PMC term 0.00131(0.00124–0.00135) 0.00125(0.00121–0.00134) 0.00120(0.00115–0.00128) 0.423
preterm 0.00135(0.00125–0.00147) 0.00127(0.00119–0.00141) 0.00122(0.00113–0.00132)
Rt.Premotor-PMC term 0.00133(0.00125–0.00139) 0.00126(0.00121–0.00134) 0.00121(0.00116–0.00127) 0.641
preterm 0.00136(0.00129–0.00149) 0.00128(0.00119–0.00143) 0.00123(0.00115–0.00132)
SCC term 0.00185(0.00176–0.00193) 0.00181(0.00168–0.00187) 0.00175(0.00167–0.00189) 0.646
preterm 0.00189(0.00169–0.00207) 0.00184(0.00169–0.00196) 0.00180(0.00160–0.00204)
Lt.Thal-PSC term 0.00143(0.00139–0.00149) 0.00136(0.00130–0.00143) 0.00131(0.00122–0.00135) 0.765
preterm 0.00145(0.00137–0.00160) 0.00138(0.00130–0.00147) 0.00133(0.00121–0.00142)
GCC term 0.00184(0.00176–0.00194) 0.00176(0.00166–0.00186) 0.00169(0.00160–0.00180) 0.848
preterm 0.00186(0.00173–0.00198) 0.00180(0.00165–0.00195) 0.00172(0.00155–0.00185)
Lt.OR term 0.00161(0.00151–0.00168) 0.00151(0.00140–0.00158) 0.00145(0.00133–0.00155) 0.849
preterm 0.00164(0.00152–0.00179) 0.00154(0.00139–0.00172) 0.00149(0.00136–0.00166)
Rt.ILF term 0.00163(0.00154–0.00172) 0.00153(0.00138–0.00163) 0.00144(0.00132–0.00153) 0.929
preterm 0.00165(0.00151–0.00178) 0.00156(0.00143–0.00170) 0.00148(0.00135–0.00158)
Rt.CST term 0.00167(0.00158–0.00174) 0.00163(0.00152–0.00176) 0.00159(0.00146–0.00172) 1.000
preterm 0.00168(0.00158–0.00187) 0.00165(0.00155–0.00183) 0.00164(0.00153–0.00175)
Lt.CG term 0.00144(0.00130–0.00153) 0.00135(0.00126–0.00151) 0.00126(0.00120–0.00139) 1.000
preterm 0.00147(0.00128–0.00159) 0.00138(0.00124–0.00150) 0.00129(0.00117–0.00138)
Rt.V1-V4 term 0.00140(0.00125–0.00154) 0.00132(0.00123–0.00142) 0.00124(0.00114–0.00136) 1.000
preterm 0.00145(0.00129–0.00160) 0.00135(0.00120–0.00152) 0.00127(0.00115–0.00143)
Rt.IFO term 0.00148(0.00140–0.00156) 0.00140(0.00132–0.00147) 0.00134(0.00126–0.00143) 1.000
preterm 0.00150(0.00143–0.00167) 0.00141(0.00133–0.00151) 0.00135(0.00128–0.00143)
MCP term 0.00158(0.00149–0.00166) 0.00152(0.00141–0.00162) 0.00148(0.00138–0.00176) 1.000
preterm 0.00160(0.00149–0.00174) 0.00155(0.00141–0.00169) 0.00150(0.00134–0.00164)
Lt.AR term 0.00138(0.00132–0.00146) 0.00132(0.00127–0.00137) 0.00128(0.00123–0.00133) 1.000
preterm 0.00139(0.00131–0.00151) 0.00133(0.00126–0.00142) 0.00129(0.00121–0.00136)
Rt.UNC term 0.00147(0.00141–0.00152) 0.00142(0.00136–0.00148) 0.00136(0.00128–0.00143) 1.000
preterm 0.00148(0.00138–0.00155) 0.00142(0.00131–0.00152) 0.00137(0.00131–0.00143)
Rt.CG term 0.00143(0.00132–0.00154) 0.00133(0.00125–0.00142) 0.00125(0.00117–0.00135) 1.000
preterm 0.00144(0.00132–0.00162) 0.00135(0.00128–0.00153) 0.00126(0.00118–.00134)
Lt.UNC term 0.00146(0.00136–0.00153) 0.00140(0.00133–0.00146) 0.00135(0.00127–0.00140) 1.000
preterm 0.00147(0.00141–0.00154) 0.00141(0.00133–0.00151) 0.00136(0.00129–0.00143)
Rt.V1-MT term 0.00149(0.00138–0.00156) 0.00141(0.00133–0.00150) 0.00133(0.00122–0.00162) 1.000
preterm 0.00153(0.00137–0.00170) 0.00142(0.00129–0.00169) 0.00133(0.00124–0.00160)
Lt.IFO term 0.00147(0.00137–0.00157) 0.00140(0.00132–0.00147) 0.00133(0.00126–0.00142) 1.000
preterm 0.00148(0.00139–0.00163) 0.00139(0.00129–0.00152) 0.00134(0.00128–0.00144)
Rt.OR term 0.00164(0.00153–0.00173) 0.00152(0.00139–0.00161) 0.00144(0.00135–0.00155) -
preterm 0.00165(0.00145–0.00181) 0.00156(0.00137–0.00170) 0.00148(0.00133–0.00169)
Lt.CST term 0.00151(0.00143–.00158) 0.00149(0.00143–0.00156) 0.00145(0.00139–0.00153) -
preterm 0.00151(0.00142–0.00160) 0.00149(0.00143–0.00155) 0.00149(0.00136–0.00164)
Rt.AR term 0.00140(0.00134–0.00146) 0.00135(0.00128–0.00141) 0.00130(0.00124–0.00136) -
preterm 0.00140(0.00133–0.00148) 0.00136(0.00129–0.00144) 0.00132(0.00121–0.00140)

Table 3.

Corrected second eigenvalues (e1) of each time point and the difference between term- and preterm-born groups. Results are sorted by the group effect from lower to higher p-value.

Corrected e1; mean (range)
Group effect (p)
Time point 1 Time point 2 Time point 3
Lt.V1-MT term 0.00130(0.00121–0.00143) 0.00121(0.00113–0.00131) 0.00111(0.00100–0.00122) 0.018
preterm 0.00137(0.00125–0.00153) 0.00125(0.00116–0.00136) 0.00115(0.00108–0.00124)
Lt.ILF term 0.00128(0.00122–0.00134) 0.00117(0.00107–0.00124) 0.00110(0.00103–0.00118) 0.029
preterm 0.00134(0.00119–0.00150) 0.00123(0.00112–0.00137) 0.00114(0.00104–0.00132)
BCC term 0.00136(0.00117–0.00152) 0.00131(0.00114–0.00147) 0.00126(0.00112–0.00152) 0.061
preterm 0.00147(0.00127–0.00169) 0.00140(0.00116–0.00159) 0.00133(0.00105–0.00178)
Rt.ILF term 0.00128(0.00119–0.00133) 0.00116(0.00109–0.00120) 0.00108(0.00103–0.00113) 0.069
preterm 0.00132(0.00118–0.00149) 0.00122(0.00108–0.00138) 0.00111(0.00103–0.00120)
GCC term 0.00129(0.00121–0.00140) 0.00120(0.00108–0.00128) 0.00114(0.00100–0.00127) 0.098
preterm 0.00135(0.00119–0.00155) 0.00126(0.00107–0.00146) 0.00117(0.00102–0.00133)
Lt.V1-V4 term 0.00122(0.00113–0.00131) 0.00113(0.00106–0.00124) 0.00105(0.00099–0.00114) 0.235
preterm 0.00129(0.00115–0.00147) 0.00118(0.00103–0.00132) 0.00108(0.00099–0.00120)
SCC term 0.00120(0.00111–0.00127) 0.00111(0.00101–0.00120) 0.00102(0.00091–0.00117) 0.350
preterm 0.00125(0.00113–0.00140) 0.00115(0.00102–0.00128) 0.00104(0.00090–0.00127)
Lt.Premotor-PMC term 0.00115(0.00111–0.00120) 0.00107(0.00102–0.00112) 0.00102(0.00096–0.00110) 0.407
preterm 0.00119(0.00108–0.00131) 0.00110(0.00102–0.00119) 0.00104(0.00095–0.00110)
Rt.Premotor-PMC term 0.00116(0.00109–0.00121) 0.00106(0.00101–0.00112) 0.00101(0.00094–0.00106) 0.627
preterm 0.00119(0.00111–0.00132) 0.00109(0.00101–0.00118) 0.00102(0.00096–0.00111)
Rt.Thal-PSC term 0.00104(0.00097–0.00108) 0.00095(0.00089–0.00100) 0.00090(0.00083–0.00095) 0.754
preterm 0.00106(0.00098–0.00116) 0.00098(0.00091–0.00105) 0.00091(0.00086–0.00099)
Lt.UNC term 0.00113(0.00109–0.00116) 0.00106(0.00102–0.00109) 0.00100(0.00097–0.00103) 1.000
preterm 0.00115(0.00108–0.00127) 0.00107(0.00101–0.00115) 0.00101(0.00095–0.00105)
Rt.UNC term 0.00114(0.00110–0.00119) 0.00106(0.00101–0.00110) 0.00101(0.00095–0.00105) 1.000
preterm 0.00115(0.00103–0.00125) 0.00108(0.00103–0.00116) 0.00102(0.00097–0.00106)
Rt.IFO term 0.00117(0.00110–0.00125) 0.00109(0.00104–0.00113) 0.00103(0.00098–0.00107) 1.000
preterm 0.00119(0.00112–0.00137) 0.00110(0.00105–0.00122) 0.00104(0.00098–0.00110)
Rt.V1-V4 term 0.00124(0.00111–0.00135) 0.00114(0.00108–0.00122) 0.00106(0.00099-0.00115) 1.000
preterm 0.00128(0.00114–0.00143) 0.00117(0.00104–0.00134) 0.00109(0.00099–0.00124)
Lt.CG term 0.00123(0.00117–0.00130) 0.00116(0.00109–0.00122) 0.00106(0.00100–0.00113) 1.000
preterm 0.00125(0.00117–0.00133) 0.00117(0.00110–0.00128) 0.00108(0.00099–0.00114)
Lt.AR term 0.00107(0.00103–0.00113) 0.00100(0.00093–0.00105) 0.00096(0.00091–0.00103) 1.000
preterm 0.00108(0.00101–0.00115) 0.00102(0.00097–0.00108) 0.00097(0.00091–0.00103)
Lt.OR term 0.00115(0.00100–0.00122) 0.00105(0.00094–0.00114) 0.00099(0.00089–0.00108) 1.000
preterm 0.00117(0.00106–0.00131) 0.00108(0.00096–0.00124) 0.00101(0.00091–0.00112)
Lt.Thal-PSC term 0.00109(0.00103–0.00113) 0.00101(0.00094–0.00106) 0.00095(0.00091–0.00099) 1.000
preterm 0.00110(0.00103–0.00121) 0.00102(0.00096–0.00111) 0.00095(0.00090–0.00100)
Rt.V1-MT term 0.00129(0.00121–0.00138) 0.00119(0.00110–0.00128) 0.00110(0.00101–0.00120) 1.000
preterm 0.00132(0.00121–0.00143) 0.00120(0.00106–0.00132) 0.00111(0.00098–0.00127)
Rt.CST term 0.00100(0.00093–0.00108) 0.00093(0.00088–0.00100) 0.00089(0.00081–0.00103) 1.000
preterm 0.00102(0.00094–0.00117) 0.00094(0.00081–0.00107) 0.00089(0.00078–0.00113)
Rt.AR term 0.00104(0.00099–0.00113) 0.00099(0.00093–0.00110) 0.00095(0.00089–0.00102) 1.000
preterm 0.00105(0.00097–0.00116) 0.00100(0.00091–0.00106) 0.00096(0.00090–0.00101)
Rt.CG term 0.00125(0.00120–0.00136) 0.00118(0.00110–0.00125) 0.00109(0.00102–0.00117) 1.000
preterm 0.00126(0.00117–0.00133) 0.00119(0.00113–0.00129) 0.00110(0.00103–0.00115)
Lt.IFO term 0.00115(0.00109–0.00128) 0.00106(0.00100–0.00114) 0.00102(0.00095–0.00112) 1.000
preterm 0.00116(0.00109–0.00135) 0.00108(0.00104–0.00115) 0.00102(0.00096–0.00106)
Lt.CST term 0.00091(0.00088–0.00097) 0.00085(0.00080–0.00090) 0.00080(0.00072–0.00089) 1.000
preterm 0.00092(0.00086–0.00102) 0.00086(0.00078–0.00100) 0.00080(0.00072–0.00091)
Rt.OR term 0.00123(0.00111–0.00131) 0.00112(0.00101–0.00120) 0.00106(0.00099–0.00117) 1.000
preterm 0.00123(0.00111–0.00137) 0.00113(0.00098–0.00128) 0.00106(0.00094–0.00121)
MCP term 0.00113(0.00105–0.00124) 0.00104(0.00096–0.00113) 0.00099(0.00086–0.00114) -
preterm 0.00115(0.00105–0.00125) 0.00108(0.00098–0.00121) 0.00099(0.00079–0.00112)

Table 4.

Corrected third eigenvalues (e2) of each time point and the difference between term- and preterm-born groups. Results are sorted by the group effect from lower to higher p-value.

Corrected e2; mean (range)
Group effect (p)
Time point 1 Time point 2 Time point 3
Lt.ILF term 0.00110(0.00103–0.00118) 0.00097(0.00091–0.00108) 0.00091(0.00084–0.00098) 0.007
preterm 0.00116(0.00105–0.00135) 0.00104(0.00092–0.00120) 0.00095(0.00087–0.00113)
BCC term 0.00110(0.00097–0.00124) 0.00106(0.00091–0.00120) 0.00102(0.00088–0.00121) 0.028
preterm 0.00120(0.00098–0.00144) 0.00114(0.00094–0.00134) 0.00108(0.00087–0.00132)
GCC term 0.00114(0.00103–0.00125) 0.00102(0.00093–0.00113) 0.00095(0.00086–0.00104) 0.038
preterm 0.00120(0.00104–0.00136) 0.00110(0.00094–0.00129) 0.00098(0.00087–0.00115)
Lt.V1-MT term 0.00118(0.00107–0.00129) 0.00108(0.00099–0.00116) 0.00099(0.00089–0.00109) 0.082
preterm 0.00123(0.00111–0.00139) 0.00112(0.00104–0.00126) 0.00101(0.00095–0.00108)
Lt.AR term 0.00085(0.00079–0.00091) 0.00077(0.00073–0.00081) 0.00072(0.00069–0.00077) 0.084
preterm 0.00087(0.00079–0.00096) 0.00080(0.00076–0.00085) 0.00074(0.00067–0.00079)
Rt.ILF term 0.00110(0.00102–0.00117) 0.00097(0.00088–0.00103) 0.00089(0.00083–0.00095) 0.087
preterm 0.00114(0.00102–0.00134) 0.00103(0.00093–0.00124) 0.00092(0.00082–0.00099)
Lt.UNC term 0.00097(0.00093–0.00101) 0.00089(0.00085–0.00093) 0.00084(0.00080–0.00087) 0.171
preterm 0.00100(0.00091–0.00111) 0.00091(0.00086–0.00097) 0.00084(0.00078–0.00087)
Rt.IFO term 0.00096(0.00090–0.00101) 0.00087(0.00082–0.00092) 0.00081(0.00076–0.00086) 0.174
preterm 0.00099(0.00090–0.00116) 0.00089(0.00082–0.00099) 0.00082(0.00078–0.00086)
Rt.AR term 0.00084(0.00080–0.00089) 0.00077(0.00071–0.00080) 0.00073(0.00065–0.00079) 0.256
preterm 0.00086(0.00078–0.00096) 0.00079(0.00074–0.00087) 0.00074(0.00070–0.00078)
SCC term 0.00104(0.00095–0.00111) 0.00095(0.00088–0.00105) 0.00087(0.00076–0.00098) 0.326
preterm 0.00108(0.00094–0.00122) 0.00099(0.00087–0.00109) 0.00088(0.00075–0.00103)
Rt.UNC term 0.00098(0.00094–0.00102) 0.00089(0.00084–0.00094) 0.00083(0.00078–0.00088) 0.328
preterm 0.00100(0.00088–0.00113) 0.00092(0.00085–0.00099) 0.00084(0.00080–0.00089)
Lt.CG term 0.00102(0.00097–0.00111) 0.00093(0.00087–0.00099) 0.00085(0.00078–0.00092) 0.337
preterm 0.00104(0.00096–0.00110) 0.00096(0.00087–0.00106) 0.00087(0.00080–0.00092)
Lt.V1-V4 term 0.00112(0.00106–0.00112) 0.00103(0.00096–0.00111) 0.00095(0.00091–0.00105) 0.445
preterm 0.00117(0.00106–0.00134) 0.00106(0.00096–0.00122) 0.00097(0.00089–0.00109)
Lt.Premotor-PMC term 0.00099(0.00091–0.00104) 0.00090(0.00086–0.00095) 0.00086(0.00079–0.00092) 0.847
preterm 0.00102(0.00094–0.00116) 0.00093(0.00084–0.00102) 0.00087(0.00081–0.00094)
Rt.Thal-PSC term 0.00089(0.00080–0.00095) 0.00081(0.00075–0.00087) 0.00076(0.00070–0.00080) 1.000
preterm 0.00091(0.00082–0.00102) 0.00083(0.00075–0.00090) 0.00076(0.00072–0.00081)
Rt.OR term 0.00096(0.00083–0.00105) 0.00083(0.00075–0.00092) 0.00077(0.00069–0.00085) 1.000
preterm 0.00098(0.00081–0.00117) 0.00088(0.00073–0.00103) 0.00079(0.00070–0.00093)
Lt.OR term 0.00088(0.00076–0.00095) 0.00078(0.00069–0.00091) 0.00071(0.00065–0.00076) 1.000
preterm 0.00090(0.00078–0.00111) 0.00081(0.00069–0.00093) 0.00072(0.00063–0.00082)
Rt.V1-V4 term 0.00112(0.00104–0.00123) 0.00102(0.00096–0.00111) 0.00095(0.00088–0.00105) 1.000
preterm 0.00116(0.00101–0.00131) 0.00105(0.00091–0.00117) 0.00096(0.00086–0.00112)
Rt.Premotor-PMC term 0.00099(0.00091–0.00104) 0.00091(0.00086–0.00096) 0.00086(0.00079–0.00090) 1.000
preterm 0.00102(0.00094–0.00117) 0.00092(0.00084–0.00102) 0.00086(0.00080–0.00097)
MCP term 0.00100(0.00092–0.00108) 0.00090(0.00082–0.00098) 0.00083(0.00074–0.00093) 1.000
preterm 0.00101(0.00093–0.00109) 0.00091(0.00082–0.00099) 0.00083(0.00067–0.00091)
Lt.Thal-PSC term 0.00092(0.00085–0.00097) 0.00083(0.00078–0.00088) 0.00078(0.00073–0.00082) 1.000
preterm 0.00093(0.00085–0.00104) 0.00085(0.00079–0.00094) 0.00078(0.00072–0.00083)
Rt.CG term 0.00104(0.00097–0.00112) 0.00096(0.00087–0.00101) 0.00087(0.00080–0.00093) 1.000
preterm 0.00105(0.00096–0.00118) 0.00098(0.00088–0.00108) 0.00087(0.00076–0.00094)
Rt.V1-MT term 0.00114(0.00103–0.00123) 0.00103(0.00094–0.00112) 0.00095(0.00086–0.00107) 1.000
preterm 0.00116(0.00103–0.00129) 0.00104(0.00088–0.00118) 0.00096(0.00085–0.00116)
Lt.IFO term 0.00090(0.00085–0.00099) 0.00083(0.00078–0.00089) 0.00079(0.00074–0.00084) 1.000
preterm 0.00092(0.00082–0.00111) 0.00083(0.00076–0.00088) 0.00078(0.00072–0.00083)
Rt.CST term 0.00087(0.00082–0.00094) 0.00081(0.00072–0.00090) 0.00075(0.00062–0.00080) 1.000
preterm 0.00088(0.00077–0.00101) 0.00081(0.00073–0.00089) 0.00075(0.00057–0.00089)
Lt.CST term 0.00077(0.00072–0.00081) 0.00072(0.00064–0.00077) 0.00067(0.00063–0.00073) 1.000
preterm 0.00078(0.00069–0.00086) 0.00072(0.00067–0.00080) 0.00066(0.00061–0.00075)

Table 5.

Corrected radial diffusivity values of each time point and the difference between term- and preterm-born groups. Results are sorted by the group effect from lower to higher p-value.

Corrected radial diffusivity; mean (range)
Group effect (p)
Time point 1 Time point 2 Time point 3
Lt.ILF term 0.00119(0.00114–0.00125) 0.00107(0.00099–0.00116) 0.00101(0.00095–0.00108) 0.010
preterm 0.00125(0.00113–0.00143) 0.00113(0.00102–0.00128) 0.00105(0.00097–0.00123)
Lt.V1-MT term 0.00124(0.00116–0.00136) 0.00115(0.00107–0.00124) 0.00105(0.00095–0.00116) 0.033
preterm 0.00130(0.00118–0.00146) 0.00119(0.00110–0.00131) 0.00108(0.00101–0.00116)
BCC term 0.00123(0.00109–0.00138) 0.00119(0.00102–0.00134) 0.00114(0.00100–0.00137) 0.035
preterm 0.00133(0.00115–0.00156) 0.00127(0.00105–0.00146) 0.00121(0.00096–0.00155)
Rt.ILF term 0.00119(0.00113–0.00125) 0.00107(0.00099–0.00111) 0.00099(0.00093–0.00104) 0.053
preterm 0.00123(0.00110–0.00142) 0.00112(0.00100–0.00131) 0.00102(0.00096–0.00109)
GCC term 0.00122(0.00112–0.00133) 0.00111(0.00100–0.00121) 0.00105(0.00093–0.00112) 0.057
preterm 0.00128(0.00112–0.00146) 0.00118(0.00100–0.00138) 0.00108(0.00094–0.00124)
Lt.CG term 0.00113(0.00108–0.00121) 0.00104(0.00098–0.00109) 0.00096(0.00092–0.00101) 0.192
preterm 0.00114(0.00108–0.00121) 0.00107(0.00100–0.00117) 0.00097(0.00092–0.00102)
Lt.AR term 0.00096(0.00091–0.00101) 0.00088(0.00083–0.00093) 0.00084(0.00080–0.00089) 0.250
preterm 0.00097(0.00090–0.00104) 0.00091(0.00086–0.00096) 0.00085(0.00082–0.00090)
Lt.V1-V4 term 0.00117(0.00109–0.00127) 0.00108(0.00101–0.00116) 0.00100(0.00096–0.00110) 0.298
preterm 0.00123(0.00111–0.00140) 0.00112(0.00100–0.00127) 0.00102(0.00095–0.00115)
SCC term 0.00112(0.00103–0.00119) 0.00103(0.00095–0.00112) 0.00095(0.00084–0.00105) 0.304
preterm 0.00117(0.00104–0.00131) 0.00107(0.00096–0.00118) 0.00096(0.00083–0.00115)
Lt.UNC term 0.00105(0.00101–0.00108) 0.00097(0.00094–0.00101) 0.00092(0.00089–0.00094) 0.326
preterm 0.00108(0.00100–0.00119) 0.00099(0.00094–0.00105) 0.00092(0.00087–0.00096)
Rt.IFO term 0.00106(0.00100–0.00112) 0.00098(0.00094–0.00102) 0.00092(0.00089–0.00096) 0.375
preterm 0.00109(0.00101–0.00127) 0.00100(0.00094–0.00111) 0.00093(0.00089–0.00098)
Rt.UNC term 0.00106(0.00102–0.00110) 0.00098(0.00093–0.00102) 0.00092(0.00088–0.00096) 0.469
preterm 0.00108(0.00096–0.00119) 0.00100(0.00095–0.00107) 0.00093(0.00089–0.00098)
Lt.Premotor-PMC term 0.00107(0.00101–0.00111) 0.00099(0.00094–0.00103) 0.00094(0.00087–0.00101) 0.507
preterm 0.00110(0.00101–0.00123) 0.00101(0.00093–0.00110) 0.00095(0.00088–0.00102)
Rt.Thal-PSC term 0.00097(0.00089–0.00102) 0.00088(0.00083–0.00093) 0.00083(0.00076–0.00088) 1.000
preterm 0.00099(0.00090–0.00108) 0.00090(0.00083–0.00098) 0.00084(0.00080–0.00090)
Rt.Premotor-PMC term 0.00108(0.00100–0.00113) 0.00098(0.00094–0.00104) 0.00094(0.00087–0.00098) 1.000
preterm 0.00111(0.00103–0.00124) 0.00101(0.00093–0.00110) 0.00094(0.00089–0.00104)
Rt.AR term 0.00094(0.00090–0.00100) 0.00088(0.00082–0.00095) 0.00084(0.00077–0.00090) 1.000
preterm 0.00095(0.00088–0.00106) 0.00090(0.00082–0.00095) 0.00085(0.00080–0.00089)
Rt.V1-V4 term 0.00118(0.00107–0.00129) 0.00108(0.00102–0.00117) 0.00100(0.00094–0.00110) 1.000
preterm 0.00122(0.00107–0.00137) 0.00111(0.00097–0.00126) 0.00103(0.00092–0.00118)
Lt.OR term 0.00102(0.00088–0.00108) 0.00091(0.00082–0.00101) 0.00085(0.00077–0.00092) 1.000
preterm 0.00104(0.00092–0.00121) 0.00094(0.00082–0.00108) 0.00087(0.00079–0.00095)
MCP term 0.00106(0.00099–0.00113) 0.00097(0.00091–0.00105) 0.00091(0.00081–0.00100) 1.000
preterm 0.00108(0.00099–0.00115) 0.00100(0.00091–0.00106) 0.00091(0.00073–0.00098)
Lt.Thal-PSC term 0.00101(0.00094–0.00105) 0.00092(0.00086–0.00096) 0.00086(0.00082–0.00090) 1.000
preterm 0.00102(0.00094–0.00112) 0.00094(0.00087–0.00102) 0.00086(0.00081–0.00092)
Rt.CG term 0.00115(0.00109–0.00123) 0.00107(0.00102–0.00113) 0.00098(0.00091–0.00104) 1.000
preterm 0.00115(0.00108–0.00125) 0.00108(0.00101–0.00118) 0.00098(0.00091–0.00104)
Rt.V1-MT term 0.00122(0.00112–0.00131) 0.00111(0.00102–0.00118) 0.00103(0.00094–0.00114) 1.000
preterm 0.00124(0.00112–0.00136) 0.00112(0.00099–0.00125) 0.00104(0.00092–0.00121)
Rt.OR term 0.00110(0.00097–0.00116) 0.00098(0.00088–0.00105) 0.00092(0.00085–0.00099) 1.000
preterm 0.00111(0.00099–0.00127) 0.00100(0.00086–0.00114) 0.00092(0.00084–0.00107)
Rt.CST term 0.00093(0.00088–0.00100) 0.00087(0.00080–0.00095) 0.00082(0.00074–0.00092) 1.000
preterm 0.00095(0.00087–0.00109) 0.00088(0.00077–0.00097) 0.00082(0.00073–0.00095)
Lt.IFO term 0.00103(0.00098–0.00111) 0.00095(0.00089–0.00101) 0.00090(0.00086–0.00096) 1.000
preterm 0.00104(0.00095–0.00123) 0.00096(0.00090–0.00101) 0.00090(0.00084–0.00094)
Lt.CST term 0.00084(0.00081–0.00089) 0.00079(0.00072–0.00082) 0.00074(0.00068–0.00079) 1.000
preterm 0.00085(0.00078–0.00094) 0.00079(0.00072–0.00086) 0.00073(0.00066–0.00082)

2. Experimental design, materials and methods

2.1. Experimental design

The probabilistic maps of pathways related to motor, somatosensory, auditory, visual, and limbic functions, and major white matter tracts (the corpus callosum, the inferior fronto-occipital fasciculus, and the middle cerebellar peduncle) [1] (freely downloadable from (http://cmrm.med.jhmi.edu/)) were applied to evaluate the developmental trajectories of these tracts, using longitudinal diffusion tensor imaging obtained in term-born and preterm-born infants. The FA, e0, e1, e2, and radial diffusivity were measured at each time point.

2.2. Participants

Eighty-four term-born and preterm-born infants were enrolled. The infants׳ parents or legal guardians first provided written and verbal informed consent for the study, which was approved by the Co-operative Institutional Review Board of the Queen׳s Medical Center, the University of Hawaii, and the Johns Hopkins University. Nineteen healthy term-born and 30 preterm-born infants completed the longitudinal study and were clinically evaluated by a physician to ensure they fulfilled the study criteria. Maternal exclusion criteria were: 1) Maternal age<18 years; and 2) Inability to fully understand English, which precluded informed consent. Exclusion criteria for the term-born infants included: 1) Prolonged intensive care (>7 days); 2) Intracranial hemorrhage; 3) Neonatal encephalopathy; 4) Known TORCH infection; and 5) Congenital anomaly. Preterm-born infants were excluded if they 1) required supplementary oxygen or mechanical ventilation during the time of scanning; 2) had a circulation, respiratory, or airway abnormality; or 3) were diagnosed with fever, epilepsy, or active infection. These infants also were evaluated with a modified Amiel-Tison Neurological Assessment for newborns, and all had usable MR scans at three time points: Time-point 1, 41.6±2.7 postmenstrual weeks; Time-point 2, 46.0±2.9 postmenstrual weeks; and Time point 3, 50.8±3.7 postmenstrual weeks.

2.3. MRI scans

The infants were scanned during natural sleep without sedation. A single-shot echo planer imaging (EPI) acquisition with sensitivity encoding (SENSE) was acquired using a 3T Siemens TIM Trio scanner. The parameters were: matrix, 80×80; field-of-view, 160×160 mm; 2.5 mm thickness; echo-time, 106 ms; and repetition time, 7 to 9 s. Diffusion-weighting was applied along 12 independent axes with b=1000 s/mm2, in addition to a minimally diffusion-weighted image.

2.4. Image processing

The diffusion tensor was calculated using DtiStudio. Each DTI was transformed to the JHU-neonate DTI atlas [4] using dual-channel large deformation diffeomorphic metric mapping (LDDMM) as detailed previously [2], [3], [4].

3. Application of the probabilistic maps to DTI of term- and preterm-born infants

The average of each of the scalar values (FA, e0, e1, e2, and radial diffusivity) at each white matter pathway, with a probability of more than 75%, was measured for each infant at each time point using the probabilistic maps. For each pathway, a mixed model analysis for repeated measures was performed to investigate chronological changes in the trace values related to brain development over the three time points, and the difference between groups (preterm-born versus term-born groups, and boys versus girls). The infant׳s age in postmenstrual weeks at the time of the scans was used as a covariate to adjust for variation at each time point. A p-value of 0.05, corrected for multiple comparisons (Bonferroni), was used as the threshold. SPSS Statistics 22 (IBM, Armonk, NY) was used for the statistical analyses.

Acknowledgments

This publication was made possible by grants R01HD065955, 2K24DA16170, U54NS056883, G12MD007601-26 and P41EB015909 from the National Institutes of Health, grant 46039500 from the Central Norway Regional Health Authority, and the Uehara Memorial Foundation. The contents of this paper are solely the responsibility of the authors and do not necessarily represent the official view of NIH, the Central Norway Regional Health Authority, or the Uehara Memorial Foundation. The authors are grateful to the families of our research participants, pediatricians/neonatologists (Dr. Lillian Fujimoto, Dr. Lois Chiu, and Dr. Joseph Hudak), and our research staff (Heather Johansen, Antonette Hernandez, and Caroline Jiang), who assisted with the data collection and data transfer. We also thank Ms. Mary McAllister for help with manuscript editing, Mr. Rajiv Deshpande for technical support, Dr. Susumu Mori for advice about the DTI scans, and Dr. Doris Lin for image reading and reporting as a neuroradiologist certified by the American Board of Neuroradiology.

Footnotes

Appendix A

Supplementary data associated with this article can be found in the online version at 10.1016/j.dib.2016.01.064.

Appendix A. Supplementary material

Supplementary material

mmc1.pdf (116.8KB, pdf)

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Supplementary Materials

Supplementary material

mmc1.pdf (116.8KB, pdf)

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