CorpusCallosum
Model: Eye_Ventricle
Model Information
Metrics
Average Volume (cc)
Dice Coefficient
95th Percentile Hausdorff Distance (mm)
Median Distance to Conformity (mm)
Undercontouring MDC (mm)
Overcontouring MDC (mm)
Delineation Information
Guidelines
Taken from Eekers DBP, Di Perri D, Roelofs E, Postma A, Dijkstra J, Ajithkumar T, et al. Update of the EPTN atlas for CT- and MR-based contouring in Neuro-Oncology. Radiother Oncol 2021;160:259–65. https://doi.org/10.1016/j.radonc.2021.05.013.
Method
Manual. The corpus callosum is a large bundle of white fibres connecting the two hemispheres. Radiation-induced injuries in this region were recently shown to be associated with attention and processing speed decline. Co-registration with T1-weighted MRI is recommended for delineation. The corpus callosum is best identified on the sagittal plane where it appears as a C-shaped structure. It is approximately 10 cm long and 5–10 mm thick.
Structure Boundaries
Cranial Boundary
Superiorly, it is bordered by the interhemispheric fissure / falx cerebri, and by the cingulum.
Caudal Boundary
Inferiorly, it is bounded by the septum pellucidum and fornix (medially), and by the lateral ventricles (laterally).
Lateral Boundary
The lateral borders were artificially set at the lateral border of the lateral ventricles.
Ventral Boundary
Anteriorly, the corpus callosum curves in front of the septum pellucidum and connects with the lamina terminalis.
Dorsal Boundary
Posteriorly, it ends superior to the ampulla of Galen.