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European Radiology Experimental
Fig. 1 | European Radiology Experimental

Fig. 1

From: Synthetic interpolated DSA for radiation exposure reduction via gamma variate contrast flow modeling: a retrospective cohort study

Fig. 1

Graphical representation of the experimental DSA FRR. a Original DSA with all frames represented. Each voxel (represented by the red dot) is analyzed and a GV model was fit to each voxel during the processing. b A 50% FRR DSA is generated by dropping every other frame (a 66% FRR would drop 2 out of every 3 frames, and a 75% FRR is generated by dropping 3 out of 4 frames). c GV models are fit at each voxel of the FRR DSA. Ground truth data is comprised of both the filled-in red dots and the empty red dots. The solid blue curve is the GV model fit to the FRR DSA and the black dotted line is the GV fit to all of the data. d The sDSA obtained by sampling voxel data from the FRR GV curve in blue. AT Arrival time, DSA Digital subtraction angiography, FRR Frame rate reduction, GV Gamma-variate, LT Leave time, sDSA Synthetic DSA, Tmax Time at which maximal signal intensity is observed

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