Lisa,
Are you setting both --t1b and --t1 to your new value when using the --wp flag? The standard model uses both values, the white paper model, of course, only uses one, but we use the value specified by --t1 (the --wp flag setting this internally to the 1.65 value).
Michael
> On 19 Nov 2019, at 13:22, Lisa van der Kleij <[log in to unmask]> wrote:
>
> In using FSL BASIL for ASL CBF quantification, it appears that quantified CBF barely changes with different T1b values.
>
> Without the white paper option, the quantified CBF changed when I entered the hematocrit corrected T1b from 37 ml/100g/min (T1b 1.65 s) to 34 ml/100g/min (T1b 1.80 s). However when checking the white paper option, the quantified CBF did not differ for different T1b values: 30.91 ml/100g/min (T1b 1.65 s) and 30.88 (T1b 1.80 s).
>
> I am puzzled by these results. What might be going on here?
>
> Many thanks,
>
> Lisa
>
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