Matches in SemOpenAlex for { <https://semopenalex.org/work/W2013313450> ?p ?o ?g. }
Showing items 1 to 78 of
78
with 100 items per page.
- W2013313450 abstract "Although 3He MRI permits compelling visualization of the pulmonary air spaces, quantitation of absolute ventilation is difficult due to confounds such as field inhomogeneity and relative intensity differences between image acquisition; the latter complicating longitudinal investigations of ventilation variation with respiratory alterations. To address these potential difficulties, we present a 4-D segmentation and normalization approach for intra-subject quantitative analysis of lung hyperpolarized 3He MRI. After normalization, which combines bias correction and relative intensity scaling between longitudinal data, partitioning of the lung volume time series is performed by iterating between modeling of the combined intensity histogram as a Gaussian mixture model and modulating the spatial heterogeneity tissue class assignments through Markov random field modeling. Evaluation of the algorithm was retrospectively applied to a cohort of 10 asthmatics between 19-25 years old in which spirometry and 3He MR ventilation images were acquired both before and after respiratory exacerbation by a bronchoconstricting agent (methacholine). Acquisition was repeated under the same conditions from 7 to 467 days (mean ± standard deviation: 185 ± 37.2) later. Several techniques were evaluated for matching intensities between the pre and post-methacholine images with the 95th percentile value histogram matching demonstrating superior correlations with spirometry measures. Subsequent analysis evaluated segmentation parameters for assessing ventilation change in this cohort. Current findings also support previous research that areas of poor ventilation in response to bronchoconstriction are relatively consistent over time." @default.
- W2013313450 created "2016-06-24" @default.
- W2013313450 creator A5015008578 @default.
- W2013313450 creator A5016551394 @default.
- W2013313450 creator A5026508249 @default.
- W2013313450 creator A5060305546 @default.
- W2013313450 creator A5068290990 @default.
- W2013313450 creator A5074026475 @default.
- W2013313450 date "2012-03-23" @default.
- W2013313450 modified "2023-09-23" @default.
- W2013313450 title "4-D segmentation and normalization of 3He MR images for intrasubject assessment of ventilated lung volumes" @default.
- W2013313450 doi "https://doi.org/10.1117/12.911032" @default.
- W2013313450 hasPublicationYear "2012" @default.
- W2013313450 type Work @default.
- W2013313450 sameAs 2013313450 @default.
- W2013313450 citedByCount "0" @default.
- W2013313450 crossrefType "proceedings-article" @default.
- W2013313450 hasAuthorship W2013313450A5015008578 @default.
- W2013313450 hasAuthorship W2013313450A5016551394 @default.
- W2013313450 hasAuthorship W2013313450A5026508249 @default.
- W2013313450 hasAuthorship W2013313450A5060305546 @default.
- W2013313450 hasAuthorship W2013313450A5068290990 @default.
- W2013313450 hasAuthorship W2013313450A5074026475 @default.
- W2013313450 hasConcept C105795698 @default.
- W2013313450 hasConcept C115961682 @default.
- W2013313450 hasConcept C122048520 @default.
- W2013313450 hasConcept C124504099 @default.
- W2013313450 hasConcept C126322002 @default.
- W2013313450 hasConcept C136886441 @default.
- W2013313450 hasConcept C144024400 @default.
- W2013313450 hasConcept C153180895 @default.
- W2013313450 hasConcept C154945302 @default.
- W2013313450 hasConcept C19165224 @default.
- W2013313450 hasConcept C2776042228 @default.
- W2013313450 hasConcept C2778045648 @default.
- W2013313450 hasConcept C2780333948 @default.
- W2013313450 hasConcept C2989005 @default.
- W2013313450 hasConcept C33923547 @default.
- W2013313450 hasConcept C41008148 @default.
- W2013313450 hasConcept C53533937 @default.
- W2013313450 hasConcept C71924100 @default.
- W2013313450 hasConcept C89600930 @default.
- W2013313450 hasConceptScore W2013313450C105795698 @default.
- W2013313450 hasConceptScore W2013313450C115961682 @default.
- W2013313450 hasConceptScore W2013313450C122048520 @default.
- W2013313450 hasConceptScore W2013313450C124504099 @default.
- W2013313450 hasConceptScore W2013313450C126322002 @default.
- W2013313450 hasConceptScore W2013313450C136886441 @default.
- W2013313450 hasConceptScore W2013313450C144024400 @default.
- W2013313450 hasConceptScore W2013313450C153180895 @default.
- W2013313450 hasConceptScore W2013313450C154945302 @default.
- W2013313450 hasConceptScore W2013313450C19165224 @default.
- W2013313450 hasConceptScore W2013313450C2776042228 @default.
- W2013313450 hasConceptScore W2013313450C2778045648 @default.
- W2013313450 hasConceptScore W2013313450C2780333948 @default.
- W2013313450 hasConceptScore W2013313450C2989005 @default.
- W2013313450 hasConceptScore W2013313450C33923547 @default.
- W2013313450 hasConceptScore W2013313450C41008148 @default.
- W2013313450 hasConceptScore W2013313450C53533937 @default.
- W2013313450 hasConceptScore W2013313450C71924100 @default.
- W2013313450 hasConceptScore W2013313450C89600930 @default.
- W2013313450 hasLocation W20133134501 @default.
- W2013313450 hasOpenAccess W2013313450 @default.
- W2013313450 hasPrimaryLocation W20133134501 @default.
- W2013313450 hasRelatedWork W1988928367 @default.
- W2013313450 hasRelatedWork W2045391057 @default.
- W2013313450 hasRelatedWork W2085466496 @default.
- W2013313450 hasRelatedWork W2152768474 @default.
- W2013313450 hasRelatedWork W2166767718 @default.
- W2013313450 hasRelatedWork W2600871208 @default.
- W2013313450 hasRelatedWork W2609981634 @default.
- W2013313450 hasRelatedWork W2754350655 @default.
- W2013313450 hasRelatedWork W2897195263 @default.
- W2013313450 hasRelatedWork W2098328893 @default.
- W2013313450 isParatext "false" @default.
- W2013313450 isRetracted "false" @default.
- W2013313450 magId "2013313450" @default.
- W2013313450 workType "article" @default.