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A Survey of CT Phantom Considerations for the Study of Blooming Artifacts as Observed in CT Coronary Angiography Studies: A Preliminary Study

DICK, ERIC TIMOTHY
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1205313085

Abstract Details

2008, MS, University of Cincinnati, Medicine : Radiology-Radiological Sciences (Medical Physics).
The presence of image "blooming" artifacts, in particular with respect to highly calcifiedplaques, has been a major impediment to the implementation of Multi-detector Computed Tomography (MD-CT) as an alternative to standard angiography in routine clinical practice. A beam hardening phantom system was developed to determine the dependence of blooming with respect to measured density in Hounsfield Units (HU), of 5mm diameter plaques. Custom software was developed to provide reproducible objective measurements of plaque size. Plaque diameter was measured using a series of axially distributed profiles centered on the object. Reconstruction blur was shown to be a significant, density dependent contributor to standard clinical blooming measurements. Beam hardening was shown to not affect measurements of sample diameter in a blur corrected study. Furthermore, two additional phantom designs have been proposed and evaluated for the future study of partial volume and cone beam affects on blooming.
Lisa Lemen, PhD (Committee Chair)
Elson Howard, PhD (Committee Member)
Lamba Michael, PhD (Committee Member)
147 p.
Radiation; Radiology; Scientific Imaging
blooming; computed tomography; artifact; CT; beam hardening; partial volume averaging; cone beam

Recommended Citations

Citations

  • DICK, E. T. (2008). A Survey of CT Phantom Considerations for the Study of Blooming Artifacts as Observed in CT Coronary Angiography Studies: A Preliminary Study [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1205313085

    APA Style (7th edition)

  • DICK, ERIC. A Survey of CT Phantom Considerations for the Study of Blooming Artifacts as Observed in CT Coronary Angiography Studies: A Preliminary Study. 2008. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1205313085.

    MLA Style (8th edition)

  • DICK, ERIC. "A Survey of CT Phantom Considerations for the Study of Blooming Artifacts as Observed in CT Coronary Angiography Studies: A Preliminary Study." Master's thesis, University of Cincinnati, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1205313085

    Chicago Manual of Style (17th edition)

ucin1205313085
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© 2008, all rights reserved.
This open access ETD is published by University of Cincinnati and OhioLINK.