CorpusCallosum

0.460 Avg Dice

0.550 Median Dice

9.72 Avg HD95 (mm)

12.59 Avg MDC (mm)

Delineation Information

Modality: MR
Guideline: 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.

Cranial: Superiorly, it is bordered by the interhemispheric fissure / falx cerebri, and by the cingulum.
Caudal: Inferiorly, it is bounded by the septum pellucidum and fornix (medially), and by the lateral ventricles (laterally).
Lateral: The lateral borders were artificially set at the lateral border of the lateral ventricles.
Ventral: Anteriorly, the corpus callosum curves in front of the septum pellucidum and connects with the lamina terminalis.
Dorsal: Posteriorly, it ends superior to the ampulla of Galen.