Linked Life Data

6507138

Source:http://linkedlifedata.com/resource/pubmed/id/6507138

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
1985-1-22
pubmed:abstractText
The relationship between physical characteristics (physical resolution, large object contrast and radiographic mottle) and visual detection parameters was evaluated in a water phantom. To measure visual observer performance a minified Snellen E-plate made of gold (three contrast zones) and a high contrast lead bar test pattern were investigated. A trial to test four types of equipment chains for chest radiography was further done with the E-plate technique by simulating a clinical radiography with an Alderson thorax phantom. The observer performance of the high contrast lead bar test pattern showed a good linear correlation to the physical parameters. However, none of the physical system-related parameters fully predicted the visual detectability when the equipment chains were investigated with the E-plate technique. In Alderson phantom studies the rare-earth screens and the air gap technique considerably reduced the radiation dose compared with that of the ordinary grid technique chest radiography, without impairing visual detectability significantly. The RP- and spotfilm techniques showed relatively poor properties of visual detectability.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:issn
0567-8056
pubmed:author
pubmed:issnType
Print
pubmed:volume
25
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
439-47
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
1984
pubmed:articleTitle
Visual detection and physical characteristics of roentgenographic systems. Investigations on chest imaging chains.
pubmed:publicationType
Journal Article, Comparative Study