dc.creator | Kalef-Ezra, J. K. | en |
dc.creator | Karantanas, A. H. | en |
dc.date.accessioned | 2015-11-23T10:31:04Z | |
dc.date.available | 2015-11-23T10:31:04Z | |
dc.date.issued | 1996 | |
dc.identifier.issn | 2841851 | |
dc.identifier.uri | http://hdl.handle.net/11615/28774 | |
dc.description.abstract | Purpose: In an attempt to improve field uniformity and CT number stability, the software in a CT scanner was replaced with a new version. The purpose of the present study was to investigate the influence of the software upgrading on density measurements. Material and Methods: The upgrading influence was investigated by means of a torso phantom (European spinal). The phantom simulates a torso which contains 3 vertebrae of different densities. Results: Despite the use of a reference standard under the phantom, the software change resulted in: a) improved short-term precision; b) increased density values at 80 and 100 kVp, decreased at 130 kVp; and c) increased influence of the kVp on the values. Conclusion: The results of the present study suggest that conversion factors have to be used in density values for reference populations as well as in the values of patients undergoing follow-up studies. | en |
dc.source.uri | http://www.scopus.com/inward/record.url?eid=2-s2.0-0030277284&partnerID=40&md5=974564f1cd0b5e92d135ca97a82b192d | |
dc.subject | Bone mineral density | en |
dc.subject | Computed tomography | en |
dc.subject | Quantitative | en |
dc.subject | Radiation therapy | en |
dc.subject | Software | en |
dc.subject | article | en |
dc.subject | computer assisted tomography | en |
dc.subject | computer program | en |
dc.subject | human | en |
dc.subject | image quality | en |
dc.subject | methodology | en |
dc.subject | radiodensitometry | en |
dc.subject | radiography | en |
dc.subject | spine | en |
dc.subject | Densitometry, X-Ray | en |
dc.subject | Humans | en |
dc.subject | Phantoms, Imaging | en |
dc.subject | Tomography, X-Ray Computed | en |
dc.title | Software upgrading in a CT scanner: Influence on quantitative CT | en |
dc.type | journalArticle | en |