| pubmed-article:21162142 | rdf:type | pubmed:Citation | lld:pubmed |
| pubmed-article:21162142 | lifeskim:mentions | umls-concept:C0184511 | lld:lifeskim |
| pubmed-article:21162142 | lifeskim:mentions | umls-concept:C0242485 | lld:lifeskim |
| pubmed-article:21162142 | lifeskim:mentions | umls-concept:C1706395 | lld:lifeskim |
| pubmed-article:21162142 | lifeskim:mentions | umls-concept:C1705946 | lld:lifeskim |
| pubmed-article:21162142 | lifeskim:mentions | umls-concept:C0205195 | lld:lifeskim |
| pubmed-article:21162142 | lifeskim:mentions | umls-concept:C0205344 | lld:lifeskim |
| pubmed-article:21162142 | lifeskim:mentions | umls-concept:C2698651 | lld:lifeskim |
| pubmed-article:21162142 | lifeskim:mentions | umls-concept:C0443131 | lld:lifeskim |
| pubmed-article:21162142 | pubmed:issue | 10 | lld:pubmed |
| pubmed-article:21162142 | pubmed:dateCreated | 2010-12-16 | lld:pubmed |
| pubmed-article:21162142 | pubmed:abstractText | Accurate R2* measurements are critical for many abdominal imaging applications. Conventionally, R2* maps are derived via the monoexponential fitting of signal decay within a series of gradient-echo (GRE) images reconstructed from multichannel datasets combined using a root sum-of-squares (RSS) approach. However, the noise bias at low-SNR TEs from RSS-reconstructed data often causes the underestimation of R2* values. In phantom, ex vivo animal model and normal volunteer studies, we investigated the accuracy of low-SNR R2* measurement when combining truncation and coil combination methods. The accuracy for R2* estimations was shown to be affected by the intrinsic R2* value, SNR level and the chosen reconstruction method. The R2* estimation error was found to decrease with increasing SNR level, decreasing R2* value and the use of the optimal B1-weighted combined (OBC) image reconstruction method. Data truncation based on rigorous voxel-wise SNR estimates can reduce R2* measurement error in the setting of low SNR with fast signal decay. When optimal SNR truncation thresholds are unknown, the OBC method can provide optimal R2* measurements given the minimal truncation requirements. | lld:pubmed |
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| pubmed-article:21162142 | pubmed:language | eng | lld:pubmed |
| pubmed-article:21162142 | pubmed:journal | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:21162142 | pubmed:citationSubset | IM | lld:pubmed |
| pubmed-article:21162142 | pubmed:status | MEDLINE | lld:pubmed |
| pubmed-article:21162142 | pubmed:month | Dec | lld:pubmed |
| pubmed-article:21162142 | pubmed:issn | 1099-1492 | lld:pubmed |
| pubmed-article:21162142 | pubmed:author | pubmed-author:LarsonAndrew... | lld:pubmed |
| pubmed-article:21162142 | pubmed:author | pubmed-author:YinXiaomingX | lld:pubmed |
| pubmed-article:21162142 | pubmed:author | pubmed-author:KatsaggelosAg... | lld:pubmed |
| pubmed-article:21162142 | pubmed:author | pubmed-author:ShahSaurabhS | lld:pubmed |
| pubmed-article:21162142 | pubmed:copyrightInfo | Copyright © 2010 John Wiley & Sons, Ltd. | lld:pubmed |
| pubmed-article:21162142 | pubmed:issnType | Electronic | lld:pubmed |
| pubmed-article:21162142 | pubmed:volume | 23 | lld:pubmed |
| pubmed-article:21162142 | pubmed:owner | NLM | lld:pubmed |
| pubmed-article:21162142 | pubmed:authorsComplete | Y | lld:pubmed |
| pubmed-article:21162142 | pubmed:pagination | 1127-36 | lld:pubmed |
| pubmed-article:21162142 | pubmed:dateRevised | 2011-9-26 | lld:pubmed |
| pubmed-article:21162142 | pubmed:meshHeading | pubmed-meshheading:21162142... | lld:pubmed |
| pubmed-article:21162142 | pubmed:meshHeading | pubmed-meshheading:21162142... | lld:pubmed |
| pubmed-article:21162142 | pubmed:meshHeading | pubmed-meshheading:21162142... | lld:pubmed |
| pubmed-article:21162142 | pubmed:meshHeading | pubmed-meshheading:21162142... | lld:pubmed |
| pubmed-article:21162142 | pubmed:meshHeading | pubmed-meshheading:21162142... | lld:pubmed |
| pubmed-article:21162142 | pubmed:year | 2010 | lld:pubmed |
| pubmed-article:21162142 | pubmed:articleTitle | Improved R2* measurement accuracy with absolute SNR truncation and optimal coil combination. | lld:pubmed |
| pubmed-article:21162142 | pubmed:affiliation | Xiaoming Yin, Andrew C. Larson Department of Radiology, Northwestern University, Chicago, IL, USA. | lld:pubmed |
| pubmed-article:21162142 | pubmed:publicationType | Journal Article | lld:pubmed |
| pubmed-article:21162142 | pubmed:publicationType | Research Support, N.I.H., Extramural | lld:pubmed |
