The posterior cranial fossa: a comparative MRI-based anatomic study of linear dimensions and volumetry in a homogeneous South Indian population

Chadha, Awalpreet S.; Madhugiri, Venkatesh S; Tejus, MN; Kumar, Vimal

doi:10.1007/s00276-015-1434-7

Cited by 4 publications

(3 citation statements)

References 33 publications

(50 reference statements)

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“…Skull morphometrics is very important in archaeology, forensic sciences and neurosurgery for precise anthropometric assessment of biological variability and sex identification, especially when only limited osteometric data are available (1)(2)(3)(4).…”

Section: Introductionmentioning

confidence: 99%

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Sexual Dimorphism of Foramen Magnum: Validation of Length as a Single Morphometric Predictor

Dimitrov¹,

Peeva²

2018

TJS

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PURPOSE: Skull morphometrics is very important in archaeology and forensic sciences for sex identification, especially when only limited osteometric data are available. The foramen magnum (FM) and occipital condyles, appears to be the most permanently preserved region of the human skeleton. The FM length (FML) is the most frequently measured, and often, the single available parameter of the FM in dry skulls. METHODS: FM data for 2524 skulls were taken from the Howells craniometric dataset (HCD). The validation cohort consisted of data for 177 Greek adult non-pathological intact dried skulls (GRD) as provided by the Aristotle University and National and Kapodistrian University (Athens). Descriptive statistics, parametric and non-parametric tests were used. Logistic regression modelling with the derivation of predicted probabilities and receiver operating characteristic ROC curve analyses with 95% CI were applied. Two-tailed P<0.05 was considered significant. RESULTS: The results indicate that the mean of the HCD FML in male was 35.78mm while FML mean in GRD was 35.337mm. The original regression model had predicted correctly 65% of skulls. CONCLUSIONS: There was no significant difference between the predicted and observed values for sex in the Greek skulls validation set. FML, alone, can predict sex (male) with accuracy limit of 71%.

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Section: Introductionmentioning

confidence: 99%

“…Skull-base radiology employs FML, in particular, as a __________________________ Figure 1B) as a standard reference tool to assess basilar impression. McRae's line is also part of the Power's ratio which is used as a ruleto estimate occipito-atlantal instability and dissociation (3)(4)(5).…”

Section: Introductionmentioning

confidence: 99%

Sexual Dimorphism of Foramen Magnum: Validation of Length as a Single Morphometric Predictor

Dimitrov¹,

Peeva²

2018

TJS

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“…Several studies have compared PCF dimensions in patients with these conditions with those in control individuals (Kollias et al, 1993;Trigylidas et al 2008;Furtado et al, 2009). Although normative data could indirectly be derived from the control groups of these studies, few studies establish normative values for PCF dimensions (Habibi et al, 2011;Chadha et al, 2015).…”

Section: Introductionmentioning

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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Volumetric segmentation in the context of posterior fossa-related pathologies: a systematic review

Kobets,

Alavi,

Ahmad

et al. 2024

Neurosurg Rev

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Background Segmentation tools continue to advance, evolving from manual contouring to deep learning. Researchers have utilized segmentation to study a myriad of posterior fossa-related conditions, such as Chiari malformation, trigeminal neuralgia, post-operative pediatric cerebellar mutism syndrome, and Crouzon syndrome. Herein, we present a summary of the current literature on segmentation of the posterior fossa. The review highlights the various segmentation techniques, and their respective strengths and weaknesses, employed along with objectives and outcomes of the various studies reported in the literature. Methods A literature search was conducted in PubMed, Embase, Cochrane, and Web of Science up to November 2023 for articles on segmentation techniques of posterior fossa. The two senior authors searched through databases based on the keywords of the article separately and then enrolled joint articles that met the inclusion and exclusion criteria. Results The initial search identified 2205 articles. After applying inclusion and exclusion criteria, 77 articles were selected for full-text review after screening of titles/abstracts. 52 articles were ultimately included in the review. Segmentation techniques included manual, semi-automated, and fully automated (atlas-based, convolutional neural networks). The most common pathology investigated was Chiari malformation. Conclusions Various forms of segmentation techniques have been used to assess posterior fossa volumes/pathologies and each has its advantages and disadvantages. We discuss these nuances and summarize the current state of literature in the context of posterior fossa-associated pathologies.

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The posterior cranial fossa: a comparative MRI-based anatomic study of linear dimensions and volumetry in a homogeneous South Indian population

Abstract: Posterior fossa volume is higher in men than in women, Posterior fossa dimensions were not affected by the presence of large tumors. Manual segmentation remains the most accurate method to measure posterior fossa volume.

Cited by 4 publications

References 33 publications

Sexual Dimorphism of Foramen Magnum: Validation of Length as a Single Morphometric Predictor

Sexual Dimorphism of Foramen Magnum: Validation of Length as a Single Morphometric Predictor

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

Volumetric segmentation in the context of posterior fossa-related pathologies: a systematic review

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