Comparison of Abnormal Cortical Development in Brain Malformations on Postmortem Imaging With Autopsy
|ClinicalTrials.gov Identifier: NCT00686530|
Recruitment Status : Withdrawn
First Posted : May 30, 2008
Last Update Posted : December 3, 2013
|Condition or disease||Intervention/treatment|
|Brain Malformation||Procedure: MR Imaging Procedure: Autopsy|
- Autopsy will be performed at Mount Sinai Hospital according to accepted current standards, based on clinical indications. Macroscopic examination of the fetus will be performed initially, followed by organ removal for tissue fixation for a period of two weeks. The brain is then scanned with MRI at the Hospital for Sick Children. The brain is transported in an air-tight container containing 10% formalin and sealed with paraffin lined tape. All brains will be anonymised and coded with a number prior to MRI examination. Following MR imaging, the tissue will be examined, sampled and reported in the usual fashion at Mount Sinai Hospital.
- Postmortem MR will be included as part of the autopsy examination in cases of suspected brain malformations. Postmortem MR will be performed at the Hospital for Sick Children due to availability of expertise in postmortem neuroimaging and imaging will be done using 1.5T GE CV/I MRI magnet (General Electric, Milwaukee, WI). Postmortem MR will be performed following dissection and tissue fixation to avoid any unnecessary delay in tissue fixation. The specimen will be scanned in an air-tight container containing formalin 10%, sealed with paraffin lined tape. Structural postmortem MR will include coronal spin-echo T1 (TR=517msec, TE=10msec, FOV=18cm, slice thickness=20-30mm, matrix=320x256), axial SPGR (TR=23msec, TE=8msec, FOV=18cm, slice thickness=1.1mm, matrix=256x256) and T2 imaging in three planes (TR=4115msec, TE=115msec, FOV=16cm, slice thickness=20-30mm, matrix=320x256). Diffusion tensor imaging (TR=8300msec, TE=99msec, FOV=180mm, slice thickness=2-3mm, b=700mm/sec2, NEX=8, matrix=128x128, 25 directions) will be performed in the coronal plane to match the histological sections of brain tissue in autopsy.
- Analysis. The laminar organization of the fetal cerebrum on structural MR and diffusion tensor imaging will be evaluated. In particular, the germinal matrix, intermediate zone, subplate and cortex will be assessed. This will be compared with the gold standard of histopathology. The presence or absence of corticospinal tracts will also be assessed and compared with macroscopic examination and histological sections.
- Statistical analysis. The sensitivity, specificity and accuracy of postmortem MR, both structural and diffusion tensor imaging, as compared to the gold standard of autopsy in assessing the abnormal laminar organization of fetal cerebrum will be evaluated.
|Study Type :||Observational|
|Actual Enrollment :||0 participants|
|Observational Model:||Case Control|
|Official Title:||Comparison of Abnormal Cortical Development in Brain Malformations on Postmortem Imaging With Autopsy|
|Study Start Date :||August 2007|
|Estimated Primary Completion Date :||August 2009|
|Estimated Study Completion Date :||February 2010|
Procedure: MR Imaging
Postmortem MR will be included as part of the autopsy examination in cases of suspected brain malformations. Imaging will be done using 1.5T GE CV/I MRI magnet. The specimen is scanned, following fixation, using an 8-channel head coil or 8-channel knee coil, depending on the size of the brain. Structural postmortem MR will include spin-echo T1, axial SPGR, and T2 imaging in three planes. Diffusion tensor imaging will be performed in the coronal plane.Procedure: Autopsy
Autopsy will be performed according to accepted standards, based on clinical indications. Macroscopic examination of the fetus will be performed initially , followed by organ removal for tissue fixation for a period of two weeks.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00686530
|Mount Sinai Hospital|
|Toronto, Ontario, Canada, M5G 1X5|
|The Hospital for Sick Children|
|Toronto, Ontario, Canada, M5G 1X8|
|Principal Investigator:||Susan Blaser||The Hospital for Sick Children|