Fully automated measurement of intracranial CSF and brain parenchyma volumes in pediatric hydrocephalus by segmentation of clinical MRI studies.

Autor: Russo C; Neuroradiology Unit, Department of Neuroscience, Santobono-Pausilipon Children's Hospital, Naples, Italy., Pirozzi MA; Institute of Biostructures and Bioimaging, National Research Council, Naples, Italy.; Department of Advanced Medical and Surgical Sciences, University of Campania 'Luigi Vanvitelli', Naples, Italy., Mazio F; Neuroradiology Unit, Department of Neuroscience, Santobono-Pausilipon Children's Hospital, Naples, Italy., Cascone D; Neuroradiology Unit, Department of Neuroscience, Santobono-Pausilipon Children's Hospital, Naples, Italy., Cicala D; Neuroradiology Unit, Department of Neuroscience, Santobono-Pausilipon Children's Hospital, Naples, Italy., De Liso M; Neuroradiology Unit, Department of Neuroscience, Santobono-Pausilipon Children's Hospital, Naples, Italy., Nastro A; Neuroradiology Unit, Department of Neuroscience, Santobono-Pausilipon Children's Hospital, Naples, Italy., Covelli EM; Neuroradiology Unit, Department of Neuroscience, Santobono-Pausilipon Children's Hospital, Naples, Italy., Cinalli G; Pediatric Neurosurgery Unit, Department of Neuroscience, Santobono-Pausilipon Children's Hospital, Naples, Italy., Quarantelli M; Institute of Biostructures and Bioimaging, National Research Council, Naples, Italy.
Jazyk: angličtina
Zdroj: Medical physics [Med Phys] 2023 Dec; Vol. 50 (12), pp. 7921-7933. Date of Electronic Publication: 2023 May 11.
DOI: 10.1002/mp.16445
Abstrakt: Background: Brain parenchyma (BP) and intracranial cerebrospinal fluid (iCSF) volumes measured by fully automated segmentation of clinical brain MRI studies may be useful for the diagnosis and follow-up of pediatric hydrocephalus. However, previously published segmentation techniques either rely on dedicated sequences, not routinely used in clinical practice, or on spatial normalization, which has limited accuracy when severe brain distortions, such as in hydrocephalic patients, are present.
Purpose: We developed a fully automated method to measure BP and iCSF volumes from clinical brain MRI studies of pediatric hydrocephalus patients, exploiting the complementary information contained in T2- and T1-weighted images commonly used in clinical practice.
Methods: The proposed procedure, following skull-stripping of the combined volumes, performed using a multiparametric method to obtain a reliable definition of the inner skull profile, maximizes the CSF-to-parenchyma contrast by dividing the T2w- by the T1w- volume after full-scale dynamic rescaling, thus allowing separation of iCSF and BP through a simple thresholding routine.
Results: Validation against manual tracing on 23 studies (four controls and 19 hydrocephalic patients) showed excellent concordance (ICC > 0.98) and spatial overlap (Dice coefficients ranging from 77.2% for iCSF to 96.8% for intracranial volume). Accuracy was comparable to the intra-operator reproducibility of manual segmentation, as measured in 14 studies processed twice by the same experienced neuroradiologist. Results of the application of the algorithm to a dataset of 63 controls and 57 hydrocephalic patients (19 with parenchymal damage), measuring volumes' changes with normal development and in hydrocephalic patients, are also reported for demonstration purposes.
Conclusions: The proposed approach allows fully automated segmentation of BP and iCSF in clinical studies, also in severely distorted brains, enabling to assess age- and disease-related changes in intracranial tissue volume with an accuracy comparable to expert manual segmentation.
(© 2023 The Authors. Medical Physics published by Wiley Periodicals LLC on behalf of American Association of Physicists in Medicine.)
Databáze: MEDLINE
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