Comparative Reliability of Total Intracranial Volume Estimation Methods and the Influence of Atrophy in a Longitudinal Semantic Dementia Cohort

Pengas, George; Pereira, João; Williams, Guy B.; Nestor, Peter J.

doi:10.1111/j.1552-6569.2008.00246.x

Cited by 84 publications

(84 citation statements)

References 24 publications

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“…Intracranial volume (ICV) was calculated and used to correct the regional brain volumes analyses. Given the recent evidence about the lower precision of FreeSurfer 6 to estimate ICV than other fully automated segmentation techniques, we decided to calculated ICV by using SPM2 (http://www.fil.ion.ucl.ac.uk/spm). The SPM method was based on the subjects' segmented images in native space: gray matter, white matter, and CSF.…”

Section: Mr Imaging Scanning and Image Processingmentioning

confidence: 99%

“…FreeSurfer calculates brain subvolumes by assigning a neuroanatomic label to each voxel in an MR imaging volume, on the basis of probabilistic information estimated automatically from a manually labeled training set. Several studies have validated the use of this method to quantify subcortical volume in dementia, 6 epilepsy, 7,8 and depressive disorders 9 and to evaluate the effects of aging. 10 The aim of this work was, therefore, to determine the efficacy and utility of using automatic segmentation labeling to quantify atrophy in patients with ET.…”

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confidence: 99%

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Cerebellar Atrophy in Essential Tremor Using an Automated Segmentation Method

Cerasa

Messina²,

Nicoletti³

et al. 2009

AJNR Am J Neuroradiol

126

109

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BACKGROUND AND PURPOSE:Essential tremor (ET) is a slowly progressive disorder characterized by postural and kinetic tremors most commonly affecting the forearms and hands. Several lines of evidence from physiologic and neuroimaging studies point toward a major role of the cerebellum in this disease. Recently, voxel-based morphometry (VBM) has been proposed to quantify cerebellar atrophy in ET. However, VBM was not originally designed to study subcortical structures, and the complicated anatomy of the cerebellum may hamper the automatic processing of VBM. The aim of this study was to determine the efficacy and utility of using automated subcortical segmentation to identify atrophy of the cerebellum and other subcortical structures in patients with ET.

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Section: Mr Imaging Scanning and Image Processingmentioning

confidence: 99%

mentioning

confidence: 99%

Cerebellar Atrophy in Essential Tremor Using an Automated Segmentation Method

Cerasa

Messina²,

Nicoletti³

et al. 2009

AJNR Am J Neuroradiol

126

109

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“…However, their clinical usefulness is limited by time-consuming work flows. 11 Recently, a novel MR imaging quantification sequence, QRAPMASTER, was developed for rapid and simultaneous sampling of the longitudinal relaxation time (T1), the transversal relaxation time (T2), and PD. 13,14 Included in this measurement is the correction for the B1 field inhomogeneity.…”

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confidence: 99%

“…8 Commonly, the volumetric measures are normalized in relation to the ICV to decrease the effect of variations in head size. [9][10][11] Manual segmentation of ICV is considered the reference method. 12 This is performed by tracing the outer contour of the ICV on each frame in a stack of images covering the head.…”

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confidence: 99%

Evaluation of Automatic Measurement of the Intracranial Volume Based on Quantitative MR Imaging

Ambarki

Lindqvist²,

Wåhlin³

et al. 2012

AJNR Am J Neuroradiol

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BACKGROUND AND PURPOSE:Brain size is commonly described in relation to ICV, whereby accurate assessment of this quantity is fundamental. Recently, an optimized MR sequence (QRAPMASTER) was developed for simultaneous quantification of T1, T2, and proton density. ICV can be measured automatically within minutes from QRAPMASTER outputs and a dedicated software, SyMRI. Automatic estimations of ICV were evaluated against the manual segmentation.

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“…In one study; researchers used four groups including adult controls (AC), adults with Alzheimer's disease (AD), pediatric controls (PC) and group of pediatric epilepsy and FSL subjected to tuning are the more appropriate tools for the PC group (Sargolzaei et al, 2015). Although there are many studies to prove the accuracy of the automated methods, manual methods are still preferred (Pengas et al, 2009;Nordenskjöld et al, 2013). Many study demostrated that a stereologic technique (point counting) on CT scans may provide unbiased organ volume estimations and their results were similar to gold standard studies (Sahin et al; Nisari et al) One clinical study investigated ICV control (aged 172 ± 8 days and 10-486 days.)…”

Section: Discussionmentioning

confidence: 99%

The Intracranial and Posterior Cranial Fossa Volumes and Volume Fractions in Children: A Stereological Study

et al. 2017

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ERTEKIN, T.; DEGERMENCI, M.; UCAR, I.; SAGIROGLU, A.; ATAY, E. & SUSAR, H.The intracranial and posterior cranial fossa volumes and volume fractions in children: A stereological study. Int. J. Morphol., 35(4):1465Morphol., 35(4): -1472Morphol., 35(4): , 2017. SUMMARY:The size of intracranial cavity (IC) and posterior cranial fossa (PCF) plays an important role in the pathophysiology of various disorders. In this study, we aimed at establishing normal volume data of the IC and PCF in Turkish population according to age and sex by using stereological method. This study was carried out retrospectively on 339 individuals (168 females and 171 males) between 0 and 18 years old with no medical or neurological disorders that affected the skeletal morphology of the cranial cavity. Volumetric estimations were determined on computed tomography (CT) images using point-counting approach of stereological methods. Intracranial volume (ICV) and posterior cranial fossa volume (PCFV) were increased with age in both sexes. They reached adult dimensions at 5 years of age during the teenage years. According to sex; the mean ICV and PCFV were 1594.51±245.57cm 3 and 244.89±53.86 cm 3 in males, 1456.34±241.85 cm 3 and 228.24±41.38 cm 3 in females, respectively. Generally, significant differences were determined in ICV and PCFV according to sex after they reached maximum growth period. According to age the volume ratios of PCF to IC was ranged from 13.03 to 17.48 in males and 12.06 to 18.54 in females. This study demonstrated that these volume ratios could help the physician for both patient selections for surgery, and for the assessment of any surgical technique used to treatment of PCF malformations. However current study revealed that point counting method can produce accurate volume estimations and is effective in determining volume estimation of IC and PCF.

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Comparative Reliability of Total Intracranial Volume Estimation Methods and the Influence of Atrophy in a Longitudinal Semantic Dementia Cohort

Abstract: The mid-cranial sampling of PD images achieved the best combination of precision, reliability, and user-friendliness. SPM5 is an attractive alternative if the highest level of precision is not required.

Cited by 84 publications

References 24 publications

Cerebellar Atrophy in Essential Tremor Using an Automated Segmentation Method

Cerebellar Atrophy in Essential Tremor Using an Automated Segmentation Method

Evaluation of Automatic Measurement of the Intracranial Volume Based on Quantitative MR Imaging

The Intracranial and Posterior Cranial Fossa Volumes and Volume Fractions in Children: A Stereological Study

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