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EJNMMI Physics
Fig. 3 | EJNMMI Physics

Fig. 3

From: Simultaneous 166Ho/99mTc dual-isotope SPECT with Monte Carlo-based downscatter correction for automatic liver dosimetry in radioembolization

Fig. 3

Line profiles of 99mTc line source and 99mTc cylindrical phantom, with the corresponding projections in the upper left corners. Both recorded in the 140-keV energy window (top row) and the 81-keV energy window (bottom row). The line profiles of the line source (left column) were obtained by summing along the length of the line source as indicated by the dashed box. Both profiles were scaled to normalize the summed intensity in the 140-keV window for the measurement and simulation independently. The line profiles of the cylindrical phantom (right column) were obtained by averaging the projection images over all angles (120 angles over a 360-degree rotation), and subsequently averaging along the length of the phantom indicated by the dashed box

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