The CBF (in mL/100 g/min) maps with zoomed ROI regions of a patients (ID 3) calculated using different deconvolution algorithms at tube current of 30, 15 and 10 mAs with normal sampling rate. Baseline methods sSVD, bSVD, Tikhonov and SPD overestimate CBF values, while TTV corresponds with the reference. As the tube current decreases and the radiation level reduces, the over-estimation of CBF values using baseline methods becomes more apparent. (Color image)