Abstract #0166

Comparing population Receptive Field mapping using VASO-CBV and BOLD

Icaro A.F. Oliveira^1,2, Yuxuan Cai^1,2, Shir Hofstetter¹, Jeroen C.W. Siero^1,3, Wietske van der Zwaag¹, and Serge O. Dumoulin^1,2,4

¹Spinoza Centre for Neuroimaging, Amsterdam, Netherlands, ²Experimental and Applied Psychology, VU University, Amsterdam, Netherlands, ³Radiology, University Medical Centre Utrecht, Utrecht, Netherlands, ⁴Experimental Psychology, Helmholtz Institute, Utrecht University, Utrecht, Netherlands

Synopsis

We extended the use of VASO-CBV to pRF mapping modeling. We show that VASO-CBV data can be used reliably to map polar angle and eccentricity, similar to BOLD-based data. In addition, the pRF size increased systematically from V1 to V3 similarly for BOLD and VASO-CBV estimates. The higher microvascular specificity of VASO-CBV did not result in smaller pRF size estimates. This result suggests that the vascular contribution to the pRF size is not dominant in either VASO-CBV or BOLD-based pRF mapping.

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