Diffuse intrinsic pontine glioma: is MRI surveillance improved by region of interest volumetry?
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- 作者：Garan T. Riley (1)
Paul A. Armitage (2)
Ruth Batty (3)
Paul D. Griffiths (2)
Vicki Lee (4)
John McMullan (5)
Daniel J.A. Connolly (3)
1. Department of General Radiology ; North Tees & Hartlepool NHS Foundation Trust ; University Hospital of North Tees ; Hardwick Road ; Stockton-on-Tees ; Cleveland ; TS19 8PE ; UK
2. Academic Unit of Radiology ; University of Sheffield ; Sheffield ; UK
3. Department of Radiology ; Sheffield Children鈥檚 NHS Foundation Trust ; Sheffield ; UK
4. Department of Oncology ; Sheffield Children鈥檚 NHS Foundation Trust ; Sheffield ; UK
5. Department of Neurosurgery ; Sheffield Children鈥檚 NHS Foundation Trust ; Sheffield ; United Kingdom - 关键词：Diffuse intrinsic pontine glioma ; Brainstem glioma ; Tumour surveillance ; Volumetry ; Children
- 刊名：Pediatric Radiology
- 出版年：2015
- 出版时间：February 2015
- 年：2015
- 卷：45
- 期：2
- 页码：203-210
- 全文大小：384 KB
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18. Steffen-Smith EA, Baker EH, Venzon D et al (2014) Measurements of the pons as a biomarker of progression for pediatric DIPG. J Neurooncol 116:127鈥?33 CrossRef - 刊物类别：Medicine
- 刊物主题：Medicine & Public Health
Imaging and Radiology
Pediatrics
Neuroradiology
Nuclear Medicine
Ultrasound
Oncology - 出版者：Springer Berlin / Heidelberg
- ISSN：1432-1998
文摘
Background Paediatric diffuse intrinsic pontine glioma (DIPG) is noteworthy for its fibrillary infiltration through neuroparenchyma and its resultant irregular shape. Conventional volumetry methods aim to approximate such irregular tumours to a regular ellipse, which could be less accurate when assessing treatment response on surveillance MRI. Region-of-interest (ROI) volumetry methods, using manually traced tumour profiles on contiguous imaging slices and subsequent computer-aided calculations, may prove more reliable. Objective To evaluate whether the reliability of MRI surveillance of DIPGs can be improved by the use of ROI-based volumetry. Materials and methods We investigated the use of ROI- and ellipsoid-based methods of volumetry for paediatric DIPGs in a retrospective review of 22 MRI examinations. We assessed the inter- and intraobserver variability of the two methods when performed by four observers. Results ROI- and ellipsoid-based methods strongly correlated for all four observers. The ROI-based volumes showed slightly better agreement both between and within observers than the ellipsoid-based volumes (inter-[intra-]observer agreement 89.8% [92.3%] and 83.1% [88.2%], respectively). Bland-Altman plots show tighter limits of agreement for the ROI-based method. Conclusion Both methods are reproducible and transferrable among observers. ROI-based volumetry appears to perform better with greater intra- and interobserver agreement for complex-shaped DIPG.