Advantages and challenges of using arterial spin labelling MRI to monitor cerebral blood flow in multi-centre clinical trials of neurodegenerative disease: Comment

•More research should be performed on how to deal with variances in MRI machines and imaging settings across several locations. Using higher resolution imaging techniques or creating statistical methods to adjust results to account for variances in MRI machines between sites can help to improve the study's accuracy.•More research should be performed on how to deal with variances in MRI machines and imaging settings across several locations.•Using higher resolution imaging techniques or creating statistical methods to adjust results to account for variances in MRI machines between sites can help to improve the study's accuracy.