Abstract：
PURPOSE:Computed tomography (CT) accounts for more than half of the total radiation exposure from medical procedures, which makes dose reduction in CT an effective means of reducing radiation exposure. We analysed the dose reduction that can be achieved with a new CT scanner [Somatom Edge (E)] that incorporates new developments in hardware (detector) and software (iterative reconstruction). METHODS:We compared weighted volume CT dose index (CTDI(vol)) and dose length product (DLP) values of 25 consecutive patients studied with non-enhanced standard brain CT with the new scanner and with two previous models each, a 64-slice 64-row multi-detector CT (MDCT) scanner with 64 rows (S64) and a 16-slice 16-row MDCT scanner with 16 rows (S16). We analysed signal-to-noise and contrast-to-noise ratios in images from the three scanners and performed a quality rating by three neuroradiologists to analyse whether dose reduction techniques still yield sufficient diagnostic quality. RESULTS:CTDI(Vol) of scanner E was 41.5 and 36.4 % less than the values of scanners S16 and S64, respectively; the DLP values were 40 and 38.3 % less. All differences were statistically significant (p < 0.0001). Signal-to-noise and contrast-to-noise ratios were best in S64; these differences also reached statistical significance. Image analysis, however, showed "non-inferiority" of scanner E regarding image quality. CONCLUSIONS:The first experience with the new scanner shows that new dose reduction techniques allow for up to 40 % dose reduction while still maintaining image quality at a diagnostically usable level.
journal_name
Clin Neuroradioljournal_title
Clinical neuroradiologyauthors
Ozdoba C,Slotboom J,Schroth G,Ulzheimer S,Kottke R,Watzal H,Weisstanner Cdoi
10.1007/s00062-013-0263-5subject
Has Abstractpub_date
2014-03-01 00:00:00pages
23-8issue
1eissn
1869-1439issn
1869-1447journal_volume
24pub_type
杂志文章abstract：PURPOSE:Since the incidental discovery and systematic introduction of mechanical endovascular stroke treatment in 2015 there are few reports about the real-life situation in daily clinical practice. The aim of this study was to evaluate the mechanical thrombectomy data documented in the quality assurance database of th...
journal_title：Clinical neuroradiology
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journal_title：Clinical neuroradiology
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journal_title：Clinical neuroradiology
pub_type： 临床试验,杂志文章
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journal_title：Clinical neuroradiology
pub_type： 临床试验,杂志文章
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journal_title：Clinical neuroradiology
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journal_title：Clinical neuroradiology
pub_type： 杂志文章,评审
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更新日期：2020-06-01 00:00:00
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更新日期：2019-03-01 00:00:00
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journal_title：Clinical neuroradiology
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journal_title：Clinical neuroradiology
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更新日期：2014-09-01 00:00:00
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journal_title：Clinical neuroradiology
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更新日期：2011-09-01 00:00:00
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journal_title：Clinical neuroradiology
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更新日期：2019-03-01 00:00:00
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journal_title：Clinical neuroradiology
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更新日期：2019-12-01 00:00:00
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更新日期：2010-12-01 00:00:00
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更新日期：2011-06-01 00:00:00
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journal_title：Clinical neuroradiology
pub_type： 杂志文章,评审
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更新日期：2015-10-01 00:00:00
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journal_title：Clinical neuroradiology
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更新日期：2017-06-01 00:00:00
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更新日期：2015-03-01 00:00:00
