THICKNESS MAPPING OF NEPALESE CALVARIA USING COMPUTERIZED TOMOGRAPHY

Abstract

Background: The bony skeleton of the head is termed skull. Skull composed of cranial vault and base. Cranial vault is known as Calvaria. Cranial vault (Calvaria) is the superior view of skull (Norma Verticalis). Calvarium consists of frontal, parietal, temporal and occipital bones. Total thickness of calvarial bones includes outer table, diploe and inner table. Diploe is made up of spongy bone. Outer and inner table made up of compact bone. This study aims to measure the image assisted measurement of thickness of Calvaria and to observe the variation in thickness with age, gender and ethnicity.

Methods: This was a descriptive cross-sectional study conducted at Department of Radiology, Chitwan Medical College Teaching Hospital Bharatpur-13, Chitwan. Patient of age 15 to 50 years with normal CT finding were included in the study. Using the axial view of brain CT, the thickness of Calvaria was measured and recorded in millimeter.

Results: Hundred calvarial thickness was measured using computerized tomography scan. Thickness of frontal bone; parietal bone and occipital bone ranges from 0.37 mm to 0.97mm with mean value 0.6991±0.311mm;0.36mm to 0.99 with mean 0.6772±0.15058 mm and 0.30 to 0.95mm with mean 0.68±0.15236 respectively. No significant correlation between thickness of frontal, parietal and occipital bone is observed using Pearson coefficient.

Conclusions: There is slight variation of calvarial thickness of frontal, parietal and occipital bone. The frontal, parietal and occipital bone thickness are not significantly correlated with each other.