Occupational and patient exposure as well as image quality for full spine examinations with the EOS imaging system.

Details

Serval ID
serval:BIB_EFA9E5F8AA20
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Occupational and patient exposure as well as image quality for full spine examinations with the EOS imaging system.
Journal
Medical Physics
Author(s)
Damet J., Fournier P., Monnin P., Sans-Merce M., Ceroni D., Zand T., Verdun F.R., Baechler S.
ISSN
0094-2405 (Print)
ISSN-L
0094-2405
Publication state
Published
Issued date
2014
Peer-reviewed
Oui
Volume
41
Number
6
Pages
063901
Language
english
Notes
Publication types: Journal Article Publication Status: ppublish
Abstract
PURPOSE: EOS (EOS imaging S.A, Paris, France) is an x-ray imaging system that uses slot-scanning technology in order to optimize the trade-off between image quality and dose. The goal of this study was to characterize the EOS system in terms of occupational exposure, organ doses to patients as well as image quality for full spine examinations.
METHODS: Occupational exposure was determined by measuring the ambient dose equivalents in the radiological room during a standard full spine examination. The patient dosimetry was performed using anthropomorphic phantoms representing an adolescent and a five-year-old child. The organ doses were measured with thermoluminescent detectors and then used to calculate effective doses. Patient exposure with EOS was then compared to dose levels reported for conventional radiological systems. Image quality was assessed in terms of spatial resolution and different noise contributions to evaluate the detector's performances of the system. The spatial-frequency signal transfer efficiency of the imaging system was quantified by the detective quantum efficiency (DQE).
RESULTS: The use of a protective apron when the medical staff or parents have to stand near to the cubicle in the radiological room is recommended. The estimated effective dose to patients undergoing a full spine examination with the EOS system was 290μSv for an adult and 200 μSv for a child. MTF and NPS are nonisotropic, with higher values in the scanning direction; they are in addition energy-dependent, but scanning speed independent. The system was shown to be quantum-limited, with a maximum DQE of 13%. The relevance of the DQE for slot-scanning system has been addressed.
CONCLUSIONS: As a summary, the estimated effective dose was 290μSv for an adult; the image quality remains comparable to conventional systems.
Pubmed
Web of science
Create date
04/07/2014 17:41
Last modification date
20/08/2019 17:17
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