Fig. 4

Polar Map representations of the Data Spectrum LV insert phantom filled with ^99mTc (left upper row) and ¹²³I (right upper row) measured with the AnyScan SC with LEHR 16 min acquisition and the AnyScan TRIO with MPH-Cardiac collimator 4 min acquisition. Short axis images of the reconstructed LV inserts are presented for the ^99mTc (left lower row) and ¹²³I (right lower row) measurements. Half-moon shaped ROI was applied on both the myocardium region of the phantom (green) and a circular ROI within the LV cavity (yellow). These ROIs were applied on all four LV SPECT images and CNR values were calculated based on Eq. 3