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Traditionally data has been analyzed by visual evaluation
of image slices on radiological film. Digital representation
of this data is rarely the norm despite the increased use of computers.
To make use of the huge amount of data contained in fMRI scans, a doctor
needs a composite image for making a quantitative rather than qualitative
diagnoses. The clinically important features need to be extracted
from the image, whether that is blood flow, tumor size, or cortical activity.
In the case of fMRI it is necessary to know exactly where the areas of
cortical stimulation are located.
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