Document Detail

Prominent signal intensity of T1/T2 prolongation in subcortical white matter of the anterior temporal region on conventional screening MRI of late preterm infants with normal development.
MedLine Citation:
PMID:  18562147     Owner:  NLM     Status:  MEDLINE    
PURPOSE: This study discusses prominent signal intensity of T(1)/T(2) prolongation of subcortical white matter within the anterior temporal region in premature infant brains that radiologists may encounter when interpreting conventional screening MRIs. MATERIALS AND METHODS: T(1)- and T(2)-weighted images of 69 preterm and term infants with no neurological abnormalities or developmental delays were evaluated retrospectively for areas of prominent signal intensity of T(1)/T(2) prolongation in white matter. We measured signal intensities of anterior temporal white matter, deep temporal white matter, frontopolar white matter and subcortical white matter of the precentral gyrus. We accessed chronological changes in signal intensity in the anterior and deep temporal white matter. We also analyzed variance tests among the signal intensity ratios to the ipsilateral thalamus of white matter areas by gestational age. RESULTS: There was high frequency of prominent signal intensity of T(1)/T(2) prolongation in the temporal tip, particularly at a gestational age of 36-38 weeks. Signal intensity ratio of the anterior temporal white matter was lower on T(1)-weighted images and higher on T(2)-weighted images, and the finding became less prominent with increasing gestational age. The signal intensity ratios of anterior temporal white matter at a gestational age of 36-37 weeks and 38-39 weeks were significantly different from other regions. CONCLUSION: Prominent signal intensity of T(1)/T(2) prolongation of subcortical white matter of the anterior temporal region is seen in normal premature infants, especially those at 36-39 gestational weeks. Although it is a prominent finding, radiologists should understand that these findings do not represent a pathological condition.
Chatchada Wuttikul; Toshiaki Taoka; Toshiaki Akashi; Hiroyuki Nakagawa; Toshiteru Miyasaka; Masahiko Sakamoto; Katsutoshi Takayama; Takeshi Wada; Satoru Kitano; Junko Takahama; Nagaaki Marugami; Kimihiko Kichikawa
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Publication Detail:
Type:  Journal Article     Date:  2008-06-18
Journal Detail:
Title:  Magnetic resonance imaging     Volume:  26     ISSN:  0730-725X     ISO Abbreviation:  Magn Reson Imaging     Publication Date:  2008 Dec 
Date Detail:
Created Date:  2008-11-18     Completed Date:  2009-02-10     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8214883     Medline TA:  Magn Reson Imaging     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1374-80     Citation Subset:  IM    
Department of Radiology, Nara Medical University, Kashihara, Nara, Japan.
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MeSH Terms
Image Processing, Computer-Assisted
Infant, Newborn
Infant, Premature / growth & development*
Magnetic Resonance Imaging / methods*
Retrospective Studies
Temporal Lobe / anatomy & histology*

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