Brain Fronto-Occipital Distance (IMAGE) Radiological Society of North America Caption (a) Sagittal T1-weighted image shows brain fronto-occipital distance (FOD). (b) corpus callosum (CC), anteroposterior distance (AP), genu, midbody (MB), splenium (SP) measurements. Credit Radiological Society of North America Usage Restrictions May be used with credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.