| Hippocampal
volumes are measured for many Center studies. Because the hippocampus
plays a critical role in memory function, volume changes are of particular
interest to those studying cognition. The procedure includes a landmark-based
determination of the coronal slices which display the body of the
hippocampus. On these slices, cross-sections of the magnified hippocampal
body and parahippocamal gyrus are traced using NIH
Image. The resulting values estimate the volume of the body of
the hippocampus (about 12 mm long) and the corresponding section of
the parahippocampal gyrus.
Using
4mm coronal T2-weighted images, three hippocampal cross-sections
immediately posterior to the head of the hippocampus must be measured
to obtained the hippocampal body volume. Below are sample images
of the traced hippocampus and parahippocampal gyrus.
|
Hippocampal
Volumes
