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fetalneonatal-2012-301809.50

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Downloaded from http://fn.bmj.com/ on October 26, 2017 - Published by group.bmj.com
Abstracts
PF.35
ASSESSMENT OF FETAL MOTION TO IMPROVE
THE QUALITY OF DIFFUSION TENSOR TECHNIQUES
IN FETAL MRI
G Lockwood Estrin, J Allsop, C Malamateniou, J Hajnal, M Rutherford Perinatal
Imaging Group, Robert Steiner MRI Unit, MRC CSC, Hammersmith Hospital, Imperial
College London, London, United Kingdom
10.1136/fetalneonatal-2012-301809.50
Diffusion tensor imaging allows objective assessment of brain
microstructure, but unpredictable fetal movement presents
challenges to the antenatal application of this magnetic resonance imaging (MRI) technique. This study aimed to identify
factors which influence fetal head motion, in order to implement measures which could decrease fetal motion and improve
image quality.
A16
Arch Dis Child Fetal Neonatal Ed 2012;97(Supp 1):A1–A125
Downloaded from http://fn.bmj.com/ on October 26, 2017 - Published by group.bmj.com
Abstracts
120 pregnant (7 controls) women had a pre-MRI scan motionassessment. A visual analogue scale assessed maternal anxiety
(scale: 0-10cm). Other monitored factors included: pre-scan
maternal food and caffeine intake and exercise, temperature,
BMI, music during scan, gestational age (GA), sex and lie of the
fetus, twins or singletons, reason for scan and fetal motion at
different times during scanning. Fetal head motion was graded
on a 3-point scale relating to shifting away from a predefi ned
axis in each slice of T2-weighted dynamic scans; the sum of
movements comprised the motion score.
Maternal and gestational age range was 18-49years and 20+3 38+5weeks respectively. Difference between anxiety scores
before and after scanning ranged from 0-6.7cm. Fetal head
motion scores ranged from 3-153.
Fetal head motion increased significantly with decreasing GA
(p<0.05). A significant reduction in fetal head motion in control compared to clinical scans was found (p<0.05). No other
correlations were significant (taking fetal GA into account),
suggesting that fetal head motion cannot be reduced using
information from a pre-scan motion-assessment. Maternal
anxiety did not affect fetal motion, but a significant decrease
in anxiety was found immediately after scanning (p<0.05),
indicating that measures could be implemented to decrease
maternal anxiety before scanning.
Arch Dis Child Fetal Neonatal Ed 2012;97(Supp 1):A1–A125
A17
Downloaded from http://fn.bmj.com/ on October 26, 2017 - Published by group.bmj.com
Assessment of fetal motion to improve the
quality of diffusion tensor techniques in fetal
MRI
G Lockwood Estrin, J Allsop, C Malamateniou, J Hajnal and M Rutherford
Arch Dis Child Fetal Neonatal Ed 2012 97: A16-A17
doi: 10.1136/fetalneonatal-2012-301809.50
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