FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W1582715641> ?p ?o ?g. }

• W1582715641 abstract "Quantitative cerebral blood flow (CBF) can be obtained from dynamic susceptibility contrast (DSC) MRI using for instance the truncated singular value decomposition (tSVD). Block-circulant SVD and reformulated SVD (rSVD) are modified SVD approaches. The purpose of this study is to compare the different approaches. The optimal truncation thresholds (PSVD) for tSVD and block-circulant SVD are determined using simulated data. The optimal PSVD minimizes the CBF estimation error over all residue functions and CBF values. The observed optimal PSVD values are comparable to the values published by other authors. Most authors assume that the recirculation in the concentration curves has to be removed. Using noise-free curves the CBF estimates are independent of the recirculation. However, when noise is added, a shift in optimal PSVD occurs. Selecting the PSVD of curves without recirculation will cause underestimation of the curves with recirculation. The methods are compared in their ability to reproduce CBF. The determinationof the PSVD per voxel using generalized cross validation andL-curve criterion is investigated as well. The tSVD approach with the optimal fixed PSVD performs best. In the presence of negative delays, the tSVD approach overestimates the CBF. Block-circulant and rSVD are delayindependent. Due to its delay dependent behavior, the tSVD approach performs worse in the presence of dispersion as well. However all SVD approaches are dependent on the amount of dispersion. Furthermore different CBV calculation methods are compared: integration of the whole time signal, integration of the first pass, fitting of a gammavariate function and integration of the area under the tissue impulse response function obtained during deconvolution. The latter method performs best for all CBF, CBV and SNR values. Using clinical data, large variations in the CBF values obtained with the methods and between tissue regions are observed. After the comparisons it can be concluded that block-circulant SVD is the most promising approach due to the delay independent behavior." @default.
• W1582715641 created "2016-06-24" @default.
• W1582715641 creator A5063408621 @default.
• W1582715641 date "2010-11-08" @default.
• W1582715641 modified "2023-09-27" @default.
• W1582715641 title "Comparison of methods for quantitative analysis of dynamicsusceptibility contrast enhanced brain perfusion MRI" @default.
• W1582715641 cites W122818766 @default.
• W1582715641 cites W1551036762 @default.
• W1582715641 cites W1964293416 @default.
• W1582715641 cites W1965908957 @default.
• W1582715641 cites W1972508701 @default.
• W1582715641 cites W1986644538 @default.
• W1582715641 cites W1995273283 @default.
• W1582715641 cites W1996644227 @default.
• W1582715641 cites W1998684439 @default.
• W1582715641 cites W2000871903 @default.
• W1582715641 cites W2010769464 @default.
• W1582715641 cites W2013386120 @default.
• W1582715641 cites W2013478821 @default.
• W1582715641 cites W2017009049 @default.
• W1582715641 cites W2018577646 @default.
• W1582715641 cites W2019865884 @default.
• W1582715641 cites W2021463269 @default.
• W1582715641 cites W2022157930 @default.
• W1582715641 cites W2027006912 @default.
• W1582715641 cites W2027011035 @default.
• W1582715641 cites W2034135634 @default.
• W1582715641 cites W2038341716 @default.
• W1582715641 cites W2042450889 @default.
• W1582715641 cites W2047232697 @default.
• W1582715641 cites W2048513640 @default.
• W1582715641 cites W2049633694 @default.
• W1582715641 cites W2054586310 @default.
• W1582715641 cites W2059784307 @default.
• W1582715641 cites W2061304069 @default.
• W1582715641 cites W2062160473 @default.
• W1582715641 cites W2062248537 @default.
• W1582715641 cites W2066018398 @default.
• W1582715641 cites W2066746280 @default.
• W1582715641 cites W2071028376 @default.
• W1582715641 cites W2071125832 @default.
• W1582715641 cites W2073879852 @default.
• W1582715641 cites W2074465892 @default.
• W1582715641 cites W2080247249 @default.
• W1582715641 cites W2083148426 @default.
• W1582715641 cites W2083742812 @default.
• W1582715641 cites W2090269462 @default.
• W1582715641 cites W2094612255 @default.
• W1582715641 cites W2097169069 @default.
• W1582715641 cites W2097257597 @default.
• W1582715641 cites W2104623681 @default.
• W1582715641 cites W2118696780 @default.
• W1582715641 cites W2119555472 @default.
• W1582715641 cites W2123178597 @default.
• W1582715641 cites W2126429304 @default.
• W1582715641 cites W2128040155 @default.
• W1582715641 cites W2134637191 @default.
• W1582715641 cites W2134810315 @default.
• W1582715641 cites W2135137921 @default.
• W1582715641 cites W2139863330 @default.
• W1582715641 cites W2140464965 @default.
• W1582715641 cites W2146140938 @default.
• W1582715641 cites W2148414959 @default.
• W1582715641 cites W2151013792 @default.
• W1582715641 cites W2157872540 @default.
• W1582715641 cites W2160231574 @default.
• W1582715641 cites W2160290709 @default.
• W1582715641 cites W2170120409 @default.
• W1582715641 cites W569725322 @default.
• W1582715641 hasPublicationYear "2010" @default.
• W1582715641 type Work @default.
• W1582715641 sameAs 1582715641 @default.
• W1582715641 citedByCount "0" @default.
• W1582715641 crossrefType "dissertation" @default.
• W1582715641 hasAuthorship W1582715641A5063408621 @default.
• W1582715641 hasConcept C105795698 @default.
• W1582715641 hasConcept C106195933 @default.
• W1582715641 hasConcept C109282560 @default.
• W1582715641 hasConcept C11413529 @default.
• W1582715641 hasConcept C115973184 @default.
• W1582715641 hasConcept C121332964 @default.
• W1582715641 hasConcept C158693339 @default.
• W1582715641 hasConcept C22789450 @default.
• W1582715641 hasConcept C28826006 @default.
• W1582715641 hasConcept C33923547 @default.
• W1582715641 hasConcept C62520636 @default.
• W1582715641 hasConceptScore W1582715641C105795698 @default.
• W1582715641 hasConceptScore W1582715641C106195933 @default.
• W1582715641 hasConceptScore W1582715641C109282560 @default.
• W1582715641 hasConceptScore W1582715641C11413529 @default.
• W1582715641 hasConceptScore W1582715641C115973184 @default.
• W1582715641 hasConceptScore W1582715641C121332964 @default.
• W1582715641 hasConceptScore W1582715641C158693339 @default.
• W1582715641 hasConceptScore W1582715641C22789450 @default.
• W1582715641 hasConceptScore W1582715641C28826006 @default.
• W1582715641 hasConceptScore W1582715641C33923547 @default.
• W1582715641 hasConceptScore W1582715641C62520636 @default.
• W1582715641 hasLocation W15827156411 @default.
• W1582715641 hasOpenAccess W1582715641 @default.
• W1582715641 hasPrimaryLocation W15827156411 @default.

• next