A reconstruction algorithms for helical conebeam SPECT
Abstract
Conebeam SPECT provides improved sensitivity for imaging small organs like the brain and heart. However, current conebeam tomography with the focal point traversing a planar orbit does not acquire sufficient data to give an accurate reconstruction. In this paper, the authors employ a dataacquisition method which obtains complete data for conebeam SPECT by simultaneously rotating the gamma camera and translating the patient bed, so that conebeam projections can be obtained with the focal point traversing a helix surrounding the patient. An implementation of Grangeat's algorithm for helical conebeam projections is developed. The algorithm requires a rebinning step to convert conebeam data to parallelbeam data which are then reconstructed using the 3D Radon inversion. A fast new rebinning scheme is developed which uses all of the detected data to reconstruct the image and properly normalizes any multiply scanned data. This algorithm is shown to produce less artifacts than the commonly used Feldkamp algorithm when applied to either a circular planar orbit or a helical orbit acquisition. The algorithm can easily be extended to any arbitrary orbit.
 Authors:

 Univ. of Utah, Salt Lake City, UT (United States). Dept. of Radiology
 Publication Date:
 OSTI Identifier:
 6057740
 Resource Type:
 Journal Article
 Journal Name:
 IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States)
 Additional Journal Information:
 Journal Volume: 40:4 part 1; Journal ID: ISSN 00189499
 Country of Publication:
 United States
 Language:
 English
 Subject:
 62 RADIOLOGY AND NUCLEAR MEDICINE; SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY; ALGORITHMS; ACCURACY; DATA ACQUISITION; IMAGE PROCESSING; OPTIMIZATION; COMPUTERIZED TOMOGRAPHY; DIAGNOSTIC TECHNIQUES; EMISSION COMPUTED TOMOGRAPHY; MATHEMATICAL LOGIC; PROCESSING; TOMOGRAPHY; 550601*  Medicine Unsealed Radionuclides in Diagnostics
Citation Formats
Weng, Y, Zeng, G L, and Gullberg, G T. A reconstruction algorithms for helical conebeam SPECT. United States: N. p., 1993.
Web. doi:10.1109/23.256718.
Weng, Y, Zeng, G L, & Gullberg, G T. A reconstruction algorithms for helical conebeam SPECT. United States. https://doi.org/10.1109/23.256718
Weng, Y, Zeng, G L, and Gullberg, G T. Sun .
"A reconstruction algorithms for helical conebeam SPECT". United States. https://doi.org/10.1109/23.256718.
@article{osti_6057740,
title = {A reconstruction algorithms for helical conebeam SPECT},
author = {Weng, Y and Zeng, G L and Gullberg, G T},
abstractNote = {Conebeam SPECT provides improved sensitivity for imaging small organs like the brain and heart. However, current conebeam tomography with the focal point traversing a planar orbit does not acquire sufficient data to give an accurate reconstruction. In this paper, the authors employ a dataacquisition method which obtains complete data for conebeam SPECT by simultaneously rotating the gamma camera and translating the patient bed, so that conebeam projections can be obtained with the focal point traversing a helix surrounding the patient. An implementation of Grangeat's algorithm for helical conebeam projections is developed. The algorithm requires a rebinning step to convert conebeam data to parallelbeam data which are then reconstructed using the 3D Radon inversion. A fast new rebinning scheme is developed which uses all of the detected data to reconstruct the image and properly normalizes any multiply scanned data. This algorithm is shown to produce less artifacts than the commonly used Feldkamp algorithm when applied to either a circular planar orbit or a helical orbit acquisition. The algorithm can easily be extended to any arbitrary orbit.},
doi = {10.1109/23.256718},
url = {https://www.osti.gov/biblio/6057740},
journal = {IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States)},
issn = {00189499},
number = ,
volume = 40:4 part 1,
place = {United States},
year = {1993},
month = {8}
}