Abstract:
BACKGROUND:Diffusion tensor parameters can be analysed by fitting regions of interest (ROIs) to selected brain structures. The clinical usefulness of these measurements is influenced by their reproducibility and validity. OBJECTIVE:To investigate the reproducibility of fractional anisotropy (FA) and mean diffusivity (MD) measurements. MATERIAL AND METHODS:Seventy-six infants were imaged once at term-equivalent age. We measured several brain regions. Reproducibility was assessed using intraclass correlation coefficient and Bland-Altman method. RESULTS:Intra-observer reproducibility was excellent for FA in the calcarine cortex (right) and frontal white matter (left), and for MD in the corpus callosum (anterior), internal capsule, corona radiata, putamen, frontal white matter, optic radiation (left), thalamus (right) and calcarine cortex (right). Inter-observer reproducibility was excellent for FA in the corpus callosum (posterior) and for MD in the internal capsule and corona radiata (right). Inter-observer reproducibility was poor for FA in frontal and posterior white matter (right) and for MD in the inferior colliculus (right). Reproducibility was fair to good in other areas. The Bland-Altman plots showed no considerable bias, and variance was independent of the mean value. CONCLUSION:Reproducibility of ROI measurement was fair to good for both FA and MD.
journal_name
Pediatr Radioljournal_title
Pediatric radiologyauthors
Lepomäki VK,Paavilainen TP,Hurme SA,Komu ME,Parkkola RK,PIPARI study group.doi
10.1007/s00247-011-2234-9subject
Has Abstractpub_date
2012-02-01 00:00:00pages
175-82issue
2eissn
0301-0449issn
1432-1998journal_volume
42pub_type
杂志文章abstract::The accessory parotid gland, a little-known and seldom-mentioned anatomical variant, is a nodule of normal salivary tissue separate from the main parotid gland, located on the masseter muscle and connected to the Stensen duct at that level. It can be the site of both congenital and acquired lesions. ...
journal_title:Pediatric radiology
pub_type: 杂志文章,评审
doi:10.1007/s00247-005-0034-9
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journal_title:Pediatric radiology
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journal_title:Pediatric radiology
pub_type: 临床试验,杂志文章
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journal_title:Pediatric radiology
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journal_title:Pediatric radiology
pub_type: 杂志文章
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更新日期:2008-11-01 00:00:00
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journal_title:Pediatric radiology
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journal_title:Pediatric radiology
pub_type: 杂志文章
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更新日期:2012-06-01 00:00:00
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journal_title:Pediatric radiology
pub_type: 杂志文章
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journal_title:Pediatric radiology
pub_type: 杂志文章,评审
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更新日期:2016-04-01 00:00:00