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AJNR - American Journal of Neuroradiology

Published ahead of print on February 26, 2009
doi: 10.3174/ajnr.A1527

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Diffusion Abnormalities and Reduced Volume of the Ventral Cingulum Bundle in Agenesis of the Corpus Callosum: A 3T Imaging Study

Y. Nakata^a, A.J. Barkovich^a, M. Wahl^a,b, Z. Strominger^b, R.J. Jeremy^c, M. Wakahiro^b, P. Mukherjee^a and E.H. Sherr^b

^a Department of Radiology, University of California, San Francisco, San Francisco, Calif
^b Department of Neurology, University of California, San Francisco, San Francisco, Calif
^c Department of Pediatrics, University of California, San Francisco, San Francisco, Calif

View larger version (100K): [in this window] [in a new window]   Fig 1. Reconstructed fiber tracts of VCB are overlaid on reconstructed coronal and midsagittal sections of the color map in a healthy control (A–C) and a patient with AgCC (D–F). A and D, An anterior region of interest (white line) is drawn on the coronal section immediately anterior to the pons. B and E, A posterior region of interest (white line) is placed on a coronal section aligned with the point of intersection of the external capsule and the posterior limb of the internal capsule. C and F, Fiber tracking of the VCB is then generated from a posterior region of interest to an anterior region of interest. Coronal sections in which an anterior region of interest and a posterior region of interest are manually drawn are shown in relation to each other on a sagittal section (white lines).

View larger version (70K): [in this window] [in a new window]   Fig 2. VCB on the color map and 3D-T1WI in a healthy control (A–D) and a patient with AgCC (E–H). A and E, In the reconstructed sagittal sections of color map, the VCB is identified as a green and blue area (arrows) in the inferomedial aspect of the temporal lobe. B and F, Multiple regions of interest are overlaid on a reconstructed sagittal section of 3D-T1WI (small white lines). Arrow indicates the gray matter of the hippocampal tail. C and G, Reconstructed fiber tracts of VCB are overlaid on a reconstructed coronal section of the color map (red area). D and H, A region of interest is drawn manually in each coronal section (white line) by visually identifying the anatomic boundaries and referring to the fiber tracts of VCB on reconstructed coronal sections of the color map.