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Difference between cavum septum pellucidum (CSP), cavum vergae (CV), and cavum velum interpositi (CVI). 3=third ventricle, 4=fourth ventricle.
Images by Behrang Amini. Based on cross sectional line drawings from Born CM, et al. The septum pellucidum and its variants. An MRI study. Eur Arch Psychiatry Clin Neurosci. 2004 Oct;254(5):295-302.