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DWI of the brain: postmortal DWI of the brain in comparison with in vivo data.

Abstract：

PURPOSE:Changes in water diffusion can be quantified by diffusion-weighted MR imaging. However, there are only few reports about changes in post mortem brain. The aim of this study was to investigate the temporal pattern of the apparent diffusion coefficient (ADC) in the brain after death, to compare the values to in vivo brain and to assess the value of ex vivo DWI as a forensic tool. MATERIAL AND METHODS:The study was approved by the local Ethics Committee, and informed consent was obtained from all relatives and the control subjects. Twenty-one corpses, died of natural cause, were examined (13 males, 8 females; age: 70.5±8.7 y, weight 74±18 kg). Diffusion-Weighted Imaging (DWI) was performed with b-values of 0 and 1000 s/mm(2) at 1.5 T. Scans were repeated in intervals of 1 h. ADC-maps were calculated in thalamus, cerebrum and cerebellum. The obtained values were statistically compared to healthy volunteers (n=3) and to literature data. RESULTS:The ADC in the three regions decreased characteristically during the examination time. In the cerebrum there was a significant difference between ex vivo and in vivo ADC (p<0.001) as well as in the other regions (thalamus: p<0.001, cerebellum: p=0.045). CONCLUSION:DWI of the postmortal brain can be added to the MRI methods for a post mortem imaging.

journal_name

Forensic Sci Int

journal_title

Forensic science international

authors

Schmidt TM,Fischer R,Acar S,Lorenzen M,Heinemann A,Wedegärtner U,Adam G,Yamamura J

doi

10.1016/j.forsciint.2012.02.022

subject

Has Abstract

pub_date

2012-07-10 00:00:00

pages

180-3

issue

1-3

eissn

0379-0738

issn

1872-6283

pii

S0379-0738(12)00098-9

journal_volume

220

pub_type

杂志文章

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