Investigation of the signal behavior at diagnostic energies of prototype, direct detection, active matrix, flat-panel imagers incorporating polycrystalline HgI2
dc.contributor.author | Du, Hong | en_US |
dc.contributor.author | Antonuk, Larry E. | en_US |
dc.contributor.author | El-Mohri, Youcef | en_US |
dc.contributor.author | Zhao, Qihua | en_US |
dc.contributor.author | Su, Zhong | en_US |
dc.contributor.author | Yamamoto, Jin | en_US |
dc.contributor.author | Wang, Yi | en_US |
dc.date.accessioned | 2009-10-08T15:33:59Z | |
dc.date.available | 2009-10-08T15:33:59Z | |
dc.date.issued | 2008 | en_US |
dc.identifier.citation | Du, Hong; Antonuk, Larry E; El-Mohri, Youcef; Zhao, Qihua; Su, Zhong; Yamamoto, Jin; Wang, Yi (2008). "Investigation of the signal behavior at diagnostic energies of prototype, direct detection, active matrix, flat-panel imagers incorporating polycrystalline HgI2." Physics in Medicine and Biology 53(5):1325-1351. <http://hdl.handle.net/2027.42/64199> | en_US |
dc.identifier.issn | 0031-9155 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/64199 | |
dc.identifier.uri | http://www.ncbi.nlm.nih.gov/sites/entrez?cmd=retrieve&db=pubmed&list_uids=18296765&dopt=citation | en_US |
dc.description.abstract | "Active matrix, flat-panel x-ray imagers based on a-Si:H thin-film transistors offer many advantages and are widely utilized in medical imaging applications. Unfortunately, the detective quantum efficiency (DQE) of conventional flat-panel imagers incorporating scintillators or a-Se photoconductors is significantly limited by their relatively modest signal-to-noise ratio, particularly in applications involving low x-ray exposures or high spatial resolution. For this reason, polycrystalline HgI2 is of considerable interest by virtue of its low effective work function, high atomic number and the possibility of large-area deposition. In this study, a detailed investigation of the properties of prototype, flat-panel arrays coated with two forms of this high-gain photoconductor are reported. Encouragingly, high x-ray sensitivity, low dark current and spatial resolution close to the theoretical limits were observed from a number of prototypes. In addition, input-quantum-limited DQE performance was measured from one of the prototypes at relatively low exposures. However, high levels of charge trapping, lag and polarization, as well as pixel-to-pixel variations in x-ray sensitivity are of concern. While the results of the current study are promising, further development will be required to realize prototypes exhibiting the characteristics necessary to allow practical implementation of this approach. Publisher's note: The title was changed from: 'Signal behavior of polycrystalline HgI2 at diagnostic energies of prototype, direct detection, active matrix, flat-panel imagers' to 'Investigation of the signal behavior at diagnostic energies of prototype, direct detection, active matrix, flat-panel imagers incorporating polycrystalline HgI2' 24 hours after initial publication to correct a mistake." | en_US |
dc.format.extent | 2048710 bytes | |
dc.format.extent | 3118 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.title | Investigation of the signal behavior at diagnostic energies of prototype, direct detection, active matrix, flat-panel imagers incorporating polycrystalline HgI2 | en_US |
dc.type | Article | en_US |
dc.subject.hlbtoplevel | Engineering | en_US |
dc.identifier.pmid | 18296765 | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/64199/1/pmb8_5_011.pdf | |
dc.identifier.doi | http://dx.doi.org/10.1088/0031-9155/53/5/011 | en_US |
dc.identifier.source | Physics in Medicine and Biology | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
Files in this item
Remediation of Harmful Language
The University of Michigan Library aims to describe library materials in a way that respects the people and communities who create, use, and are represented in our collections. Report harmful or offensive language in catalog records, finding aids, or elsewhere in our collections anonymously through our metadata feedback form. More information at Remediation of Harmful Language.
Accessibility
If you are unable to use this file in its current format, please select the Contact Us link and we can modify it to make it more accessible to you.