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Advanced magnetic resonance imaging and metabolic studies of low grade gliomas in childhood

Orphanidou, Eleni (2012)
Ph.D. thesis, University of Birmingham.

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Introduction: Paediatric low grade brain tumours present diagnostic and prognostic challenges, providing a need for better non-invasive imaging characterization. The value of \(^1\)H Magnetic Resonance Spectroscopy (MRS) performed on 5 scanners in the diagnosis and prognostication of an extensive bi-centre cohort of low-grade gliomas is investigated.
Methods: Single voxel MRS was performed routinely in children with brain tumours at the Birmingham Children’s Hospital and Queen’s Medical Centre. Histopathological features were semi-quantified and in vitro \(^1\)H NMR used to study pilocytic astrocytoma cell lines. Magnetic Resonance Spectroscopic Imaging (MRSI) and texture analysis of MR images were performed.
Results: MRS detects differences between subgroups of low grade brain tumours in children and between tumours of the same histology. High myo-inositol and glycerophosphocholine and low phosphocholine are markers of good prognosis. Histological correlates for MRS metabolites have been identified and paediatric pilocytic astrocytoma cell lines (‘typical’, metastatic and recurrence) have been discriminated. The value of MRSI in answering clinical questions has been demonstrated. Texture analysis achieved high accuracy in the diagnosis of paediatric posterior fossa tumours.
Conclusion: Advanced MR techniques have a significant role in the study of paediatric brain tumours, and promising results from MRS, MRSI and texture analysis are reported here.

Type of Work:Ph.D. thesis.
Supervisor(s):Peet, Andrew and Arvanitis, Theodoros N. and Grundy, Richard
School/Faculty:Colleges (2008 onwards) > College of Medical & Dental Sciences
Department:Institute for Cancer Studies
Subjects:RC0254 Neoplasms. Tumors. Oncology (including Cancer)
Institution:University of Birmingham
ID Code:3434
This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as defined by The Copyright Designs and Patents Act 1988 or as modified by any successor legislation. Any use made of information contained in this thesis/dissertation must be in accordance with that legislation and must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the permission of the copyright holder.
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