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Using simultaneous transmission and scatter SPECT imaging from external sources for the determination of the thoracic μ-map

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3 Author(s)
S. Loncaric ; Rush Presbyterian-St. Luke's Med. Center, Chicago, IL, USA ; Wei Chang ; Gang Huang

The authors describe a new technique that uses simultaneous transmission and scatter SPECT imaging for determination of segmented attenuation μ-maps. These μ-maps could provide the basis for attenuation correction and quantification of radiopharmaceutical uptake in cardiac SPECT. For transmission imaging, a line source and a fan-beam collimator on one head of a triple-head SPECT system are used. For scatter imaging, two external ring sources and parallel collimators on one or two of the other heads are used. The fan-beam transmission data are truncated, while the parallel-beam data are not. The proposed technique uses both sets of tomographic data to complement each other and to obtain a composite image. A μ-map with three segmented regions of distinct μ-values could be derived from the composite image. This final μ-map can then be used as the basis for attenuation correction

Published in:

IEEE Transactions on Nuclear Science  (Volume:41 ,  Issue: 4 )