Seeking Advice on SynthStrip Tool for Improved Perfusion Imaging Skull Stripping

Hi everyone
I recently utilized the SynthStrip tool from (SynthStrip) for skull stripping my perfusion imaging. I observed that the images with the bad quality of skull strip had the pattern that the stripping was excessive along the upper sagittal axis, which resulted in removing a significant portion of the coronal view. Given that the perfusion imaging likely has a smaller FOV compared to structural imaging (which the skull strip did worked well), does anyone have suggestions on how to enhance the skull stripping results?

Thank you.