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Original Article

JAS. 2014; 22(2): 5-11

Lateral Ventricle Ratios Correlated To Diameters Of Cerebrum-A Study on CT Scans of Head



Lateral ventricles of brain are enlarged with normal ageing, neurodegenerative diseases and in hydrocephalus. On Computerized tomography(CT), ratios of the width of ventricles to the width of skull or brain are probably the most easily reproducible ventricular measurements. Therefore, an attempt has been made here to correlate these ratios to the diameters of the cerebrum, as a part of PhD thesis work of 1ST author under the supervision of 2nd , 3rd , and 4th authors with the objective of (1) establishing the range of parameters for lateral ventricles for the diagnosis of mild ventricular dilatation and (2)Correlating these parameters with anteroposterior(AP) and transverse(TD) diameter of cerebrum, if any. A Retrospective study of 60 near normal CT scans-(head) collected from the department of Radiology and Imaging, G.B. Pant Hospital, (patient age 5 to 70 yrs) submitted to morphometric measurements of ventricles by Dicom Image software and data evaluation. Using axial views of cerebral hemispheres, Frontal Horn Ratio (FHR), Bicaudate Ratio(BCR), Evan’s Ratio(ER), Bifrontal Index, Bioccipital Index and Cella Media Ratio (CMR) were calculated and correlated to AP and TD of cerebrum using Pearson’s correlation coefficient. Mean FHR, BCR and ER were found to be 0.30+/-.04, 0.12 +/-.03 and 0.27 +/-.035 respectively. Correlation coefficient (r) between FHR and AP, TD was found to be -.11 and -.01 respectively. Mean cella media ratio was 0.22+/-0.04. Correlation coefficient between CMR and AP, TD was 0.38 and 0.27 respectively. Bifrontal Index and Bioccipital Index were 0.29+/-0.04 and 0.42+/- 0.05 with r being 0.25(AP), 0.27(TD) and 0.13(AP), 0.03(TD) respectively. Conclusively, there is very mild negative correlation between FHR and AP whereas none with TD. Maximum correlation was between CMR and AP whereas negligible between Bioocipital ratio and TD.

Key words: Lateral ventricle ratios, Cerebrum diameters.

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