Experimental Design
| CT Technologist 1 | CT Technologist 2 | CT Technologist 3 | |
|---|---|---|---|
| Trial 1 | ROI Data Set 1 | ROI Data Set 2 | ROI Data Set 3 |
| Trial 2 | ROI Data Set 4 | ROI Data Set 5 | ROI Data Set 6 |
| Trial 3 | ROI Data Set 7 | N/A | N/A |
Note—The experiment was composed of three trials of postprocessing. All three technologists participated in the first two trials. Each technologist generated a data set derived from the placement of three predetermined identical circular ROIs on the CBV, CBF, and MTT maps generated by postprocessing the raw dynamic CTP data from the examinations of the same 20 patients (60 points per ROI data set). During the third trial, CT technologist 1 postprocessed the 20 patient data set a third time.