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. Author manuscript; available in PMC: 2013 Apr 8.
Published in final edited form as: IEEE Trans Med Imaging. 2012 Oct 18;32(2):295–305. doi: 10.1109/TMI.2012.2225441

Fig. 1.

Fig. 1

Measured I-131 point source images at six different distances between the front surface of the collimator and the object plane. Top row: 25, 20, 15 cm, bottom row: 10, 5, 2 cm. Zoomed point source image at 10 cm shows hole pattern due to high-energy collimator. The image intensity is presented on a logarithmic grey scale except for the zoomed image.