Abstract:
OBJECTIVE:The aim of the study was to assess the performance and diagnostic value of a dual energy CT approach to reduce metal artefacts in subjects with metallic implants. METHODS:31 patients were examined in the area of their metallic implants using a dual energy CT protocol (filtered 140 kVp and 100 kVp spectrum, tube current relation: 3:1). Specific post-processing was applied to generate energies of standard 120 and 140 kVp spectra as well as a filtered 140 kVp spectrum with mean photon energies of 64, 69 and 88 keV, respectively, and an optimized hard spectrum of 95-150 keV. Image quality and diagnostic value were subjectively and objectively determined. RESULTS:Image quality was rated superior to the standard image in 29/31 high energy reconstructions; the diagnostic value was rated superior in 27 patients. Image quality and diagnostic value scores improved significantly from 3.5 to 2.1 and from 3.6 to 1.9, respectively. In several exams decisive diagnostic features were only discernible in the high energy reconstructions. The density of the artefacts decreased from -882 to -341 HU. CONCLUSIONS:Dual Energy CT with specific postprocessing can reduce metal artefacts and may significantly enhance diagnostic value in the evaluation of metallic implants.
journal_name
Eur Radioljournal_title
European radiologyauthors
Bamberg F,Dierks A,Nikolaou K,Reiser MF,Becker CR,Johnson TRdoi
10.1007/s00330-011-2062-1subject
Has Abstractpub_date
2011-07-01 00:00:00pages
1424-9issue
7eissn
0938-7994issn
1432-1084journal_volume
21pub_type
杂志文章abstract::This study was prospectively conducted to evaluate the clinical potential of the advanced breast biopsy instrumentation (ABBI) system as an alternative to needle localization and open surgery in the management of nonpalpable breast lesions (NPBL). One hundred and eighty-six consecutive patients were referred for manag...
journal_title:European radiology
pub_type: 临床试验,杂志文章
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journal_title:European radiology
pub_type: 杂志文章
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journal_title:European radiology
pub_type: 杂志文章
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journal_title:European radiology
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doi:10.1007/s003300050991
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pub_type: 杂志文章,已发布勘误
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pub_type: 临床试验,杂志文章
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更新日期:2015-06-01 00:00:00
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pub_type: 杂志文章,多中心研究,随机对照试验
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pub_type: 杂志文章
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pub_type: 杂志文章
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更新日期:2019-09-01 00:00:00
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journal_title:European radiology
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journal_title:European radiology
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更新日期:2017-10-01 00:00:00
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journal_title:European radiology
pub_type: 杂志文章
doi:10.1007/s00330-012-2655-3
更新日期:2013-03-01 00:00:00
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journal_title:European radiology
pub_type: 杂志文章
doi:10.1007/s00330-006-0377-0
更新日期:2007-03-01 00:00:00