Keywords: fMRI Analysis, fMRI (task based), High‐Field MRI; Temporal Resolution; CNR.
Motivation: With ultra-high-field MRI and acceleration methods, it is feasible to acquire a whole-brain image in a sub-second time. Nevertheless, the impact of neurovascular and physiological variability on the fMRI’s effective temporal resolution (ETR) is not very clear.
Goal(s): Our goal was to characterize the ETR in a task-based fMRI in case of varying hemodynamic responses and physiological fluctuations.
Approach: Using a dynamic phantom, we generated different signal responses and evaluated ETR across the resulting dataset.
Results: The ETR was prolonged by a factor of ~1.6 in case of varying hemodynamic responses and physiological fluctuations.
Impact: This work shows a new tool to investigate the attainable effective temporal resolution of a particular fMRI experiment, demonstrating the effect of the variability in the fMRI response due to neurovascular and physiological variability.
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.
Keywords