Linked Life Data

12408479

Source:http://linkedlifedata.com/resource/pubmed/id/12408479

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
19
pubmed:dateCreated
2002-10-31
pubmed:abstractText
Several positron emitting nuclides with applications in PET, such as 76Br, 124I, 110In and 86Y, also emit gamma radiation in their decays. Measured coincidences between annihilation photons and this cascade gamma radiation are essentially true coincidences and the standard PET corrections do not account for them. We investigated the performance of 76Br in 2D and 3D PET, the effect of the gamma radiation emitted by 76Br on quantitative accuracy and the distribution of cascade gamma radiation coincidences in 2D and 3D PET sinograms. A correction method for cascade gamma radiation coincidences was implemented and evaluated. Count rate linearity was affected by the gamma radiation from the 76Br decay. Spatial resolution and sphere recovery were slightly worse for 76Br compared to 18F. Correction for cascade gamma radiation coincidences by subtraction of a linear projection tail fit improved total correction accuracy to similar values as for positron-only emitters such as 18F, and improved image contrast significantly.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0031-9155
pubmed:author
pubmed:issnType
Print
pubmed:day
7
pubmed:volume
47
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
3519-34
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2002
pubmed:articleTitle
Quantitative imaging and correction for cascade gamma radiation of 76Br with 2D and 3D PET.
pubmed:affiliation
Section of Biomedical Radiation Sciences, Rudbeck Laboratory, Uppsala University, Sweden. mark.lubberink@pet.uu.se
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't