Transmission Imaging With Axially Overlapping Cone-Beams
dc.contributor.author | Feng, B. | en_US |
dc.contributor.author | Fessler, Jeffrey A. | en_US |
dc.contributor.author | Pretorius, P. H. | en_US |
dc.contributor.author | Boening, G. | en_US |
dc.contributor.author | Beach, R. D. | en_US |
dc.contributor.author | Zeng, G. L. | en_US |
dc.date.accessioned | 2011-08-18T18:21:03Z | |
dc.date.available | 2011-08-18T18:21:03Z | |
dc.date.issued | 2004-10-16 | en_US |
dc.identifier.citation | Feng, B.; Fessler, J.A.; Pretorius, P.H.; Boening, G.; Beach, R.D.; Zeng, G.L. (2004). "Transmission Imaging With Axially Overlapping Cone-Beams." IEEE Nuclear Science Symposium Conference Record 6: 3716-3720. <http://hdl.handle.net/2027.42/85904> | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/85904 | |
dc.description.abstract | We have shown that cone-beam transmission imaging of medium-energy photons that penetrate the parallel-hole collimators can be used to rapidly estimate attenuation maps for use in reconstruction of cardiac SPECT images. Such a transmission imaging geometry offers the advantages of eliminating the need to mechanically move the point-sources during imaging, and minimizes cross-talk between emission and transmission imaging. The axial extent over which artifact-free attenuation maps can be reconstructed is limited by the cone-beam geometry and source collimation. We investigated irradiation of a single head by multiple point-sources such that their asymmetric cone-beam fields overlap in the axial direction as a method of extending the axial coverage of the patient. This study reports on testing of a penalized-likelihood algorithm for transmission reconstruction of overlapping cone-beams. This algorithm was evaluated through MCAT simulations and applied to transmission measurements of an anthropomorphic phantom. The experimental work consisted of performing a series of flood and transmission measurements on the anthropomorphic phantom with shifted axial locations of point-sources. We summed the projection data from individual measurements to simulate the projection data for a multiple point-source system. With the proposed penalized-Iikelihood algorithm, the full axial extent (20.5 cm) of the anthropomorphic phantom was reconstructed for the overlapping cone-beam geometry with 2 point-sources per camera head. | en_US |
dc.publisher | IEEE | en_US |
dc.title | Transmission Imaging With Axially Overlapping Cone-Beams | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Biomedical Engineering | en_US |
dc.subject.hlbtoplevel | Engineering | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationother | Department of Radiology, University of Massachusetts Medical School, Worcester, MA 01655. Department of Radiology, University of Utah, Salt Lake City, UT 84108. ( | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/85904/1/Fessler202.pdf | |
dc.identifier.doi | 10.1109/NSSMIC.2004.1466688 | en_US |
dc.identifier.source | IEEE Nuclear Science Symposium Conference Record | en_US |
dc.owningcollname | Electrical Engineering and Computer Science, Department of (EECS) |
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