Nikolaos Pandis wrote:
> We have a set of 3-D images constructed from cat scans, and we are measuring volumes defined by certain anatomical points on the 3-D images.
>
> The reconstruction/measuring technique is performed using 3 new types of software and their results will be compared with the results of validated/reference technique.
>
> The same reconstructions/cat scans are used for all techniques.
>
> The objective is to see how close (do they differ significantly?) the volume values recorded by each technique are to the values recorded by the reference technique.
>
> I was thinking along the lines of regression with the volume(continuous) variable as the dependent variable and technique as the categorical dependent variable with 4 levels. The reference level would be the the standard/validated method.
>
> However, how would I account for the fact that the data is correlated since all measurements for the 4 methods are taken from the same reconstructions/scans?
-help sureg-?
--
Clive Nicholas
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"My colleagues in the social sciences talk a great deal about
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