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Abstract
Background: The third ventricle of the brain is a small median cleft located in the diencephalon between right and left thalamus; anteriorly it communicates to the lateral ventricles by foramen of Monro, posteriorly connects to the fourth ventricle through the cerebral aqueduct. Morphometry and accurate measurements of the brain ventricles have clinical importance because various diseases affect the size and morphology of the ventricles. Objective: This study was aimed to determine the morphometry of third ventricle of brain by magnetic resonance imaging (MRI) scan. Methods: This cross-sectional study was conducted at Department of Anatomy, Dhaka Medical College, Dhaka, Bangladesh from January 2020 to December 2020. Patients referred by Department of Medicine, Dhaka Medical College Hospital (DMCH) for MRI were enrolled as study subjects. Total 100 adult Bangladeshi subjects (50 male and 50 female) were selected following selection criteria. Their MRI of brain was done by MAGNETOM VIDA (3T Tesla) SIEMENS MRI machine following standard procedure. The MRI scans were evaluated by registered radiologists. All parameters were measured from the soft copy of MRI scans using RadiAnt DICOM Viewer. Results: The mean (±SD) maximum height of the third ventricle was 23.69 ± 1.13 mm in male and 22.38 ± 0.72 mm in female, that was significantly larger in male (p<0.001). The mean (±SD) anterior-posterior length of third ventricle was 27.17 ± 0.67 mm and 26.16 ± 0.58 mm in male and female respectively, which was significantly higher in male than female (p<0.001). However, no significant difference was observed in mean (±SD) anterior-posterior commissural distance between male and female (26.47 ± 1.6 mm and 26.06 ± 1.00 mm, p= 0.129). The mean (±SD) maximum width of third ventricle was found significantly higher in male than female (4.33 ± 0.41 mm versus 3.68 ± 0.68 mm, p<0.001). Conclusion: The maximum height, anterior to posterior length and maximum width of third ventricle ........
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