Abstract #2198

Population-receptive field size estimates are biased by acquisition and preprocessing parameters: a 7T fMRI study

Christian Windischberger¹, David Linhardt¹, Tessa Angerer¹, Maximilian Pawloff², Markus Ritter², and Ursula Schmidt-Erfurth²

¹High Field MR Center, Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Wien, Austria, ²Department of Ophtalmology, Medical University of Vienna, Wien, Austria

Synopsis

Population receptive field (pRF) mapping is an advanced retinotopic mapping approach. While the size of pRFs has been identified as an important neurophysiological feature, remarkable differences in the pRF sizes across studies has been reported. In this study, we examine the effects of difference in spatial resolution on the pRF size obtained in a group of ten healthy subjects at 7T. Our results clearly show that the amount of spatial dependence between voxels in the visual cortex has a direct effect for the pRF sizes calculated. We can assume similar effects in data sets acquired at different spatial resolutions.

How to access this content:

For one year after publication, abstracts and videos are only open to registrants of this annual meeting. Registrants should use their existing login information. Non-registrant access can be purchased via the ISMRM E-Library.

After one year, current ISMRM & ISMRT members get free access to both the abstracts and videos. Non-members and non-registrants must purchase access via the ISMRM E-Library.

After two years, the meeting proceedings (abstracts) are opened to the public and require no login information. Videos remain behind password for access by members, registrants and E-Library customers.

Click here for more information on becoming a member.