Linked Life Data

21099177

Source:http://linkedlifedata.com/resource/pubmed/id/21099177

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
11
pubmed:dateCreated
2010-11-24
pubmed:abstractText
Selection of the signal is one of the major factors in a receiver operating characteristic (ROC) study for evaluating the diagnostic accuracy of medical imaging systems. We investigated the effect of signal selections in ROC studies which were applied to evaluate a difference between the two systems. Each of 50 positive and 50 negative images obtained with and without two different types of phantom signals, but with the same background noise and two different digital imaging systems, were used as case samples. We assumed that two different types of phantom signal could be related to image resolution and graininess, respectively. We employed two systems which were assumed to have advantages in resolution and graininess, respectively. Twelve observers participated in this ROC study, which aimed to compare two parameter settings in computed radiography systems. A statistical significance test considering case and reader variations was conducted for each of the ROC data sets with two different signals. As results, p values obtained in the statistical significance test were varied by changing the type of signal even if the same observer group participated and the same two different systems were compared (p value = 0.0003 and 0.0944). In conclusion, it was suggested that the selection of phantom signal for an ROC study could lead to different conclusions if the type of phantom signal was not matched to the purpose of the ROC study.
pubmed:language
jpn
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0369-4305
pubmed:author
pubmed:issnType
Print
pubmed:day
20
pubmed:volume
66
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1467-73
pubmed:dateRevised
2011-7-28
pubmed:meshHeading
pubmed:year
2010
pubmed:articleTitle
[Effect of signal selection in receiver operating characteristics (ROC) analysis].
pubmed:affiliation
Kumamoto University Graduate School of Health Science.
pubmed:publicationType
Journal Article, Comparative Study, English Abstract