FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2289235321> ?p ?o ?g. }

• W2289235321 abstract "Introduction Non-invasive time-resolved velocity field and volumetric flow measurements can be made within the cardiovascular system with cardiac-gated phase contrast (PC) MRI. Given the constraint of a breath-hold length, PC MRI applied with segmented fast-gradient-echo techniques has a low effective temporal resolution because several kylines must be acquired per heartbeat (several views per segment (VPS)). Additionally, the acquisition of phase reference images, typically interleaved with the velocity-phase images, reduces the temporal resolution as compared to a standard cine image experiment. For example, assuming a single velocity encoding direction, a range of 4-8 VPS and a TR from 4 ms to 8 ms, a phase contrast image frame will contain information from a window ranging from 32 ms to 128 ms in length (the sampling window). Acquisition of additional velocity directions requires either additional breath-holds or a longer sampling window. In this study we present a high temporal resolution approach that maintains both the spatial resolution and the breath-hold time. A factor of two improvement in temporal resolution is achieved by acquiring the phase reference images in a separate breath hold rather than interleaved with the velocity phase images. Additionally, a multiecho readout is incorporated into the PC experiment to acquire more views/time than possible with the single gradient echo technique [1]. The velocity-sampling window is reduced to as short as the length of a single TR interval, and the complete set of three velocity images can be acquired in four breath-holds. We illustrate single TR resolution PC velocity data acquired from a normal volunteer, as well as the influence of increasing the length of the sampling window beyond a single TR, over a range of 1 to 7 TRs (spanning 10 ms to 70 ms). Complex temporal and spatial ventricular blood flow patterns are displayed and the actual required temporal resolution is discussed. Methods The scan parameters were: FOV = 32 x 24 cm with a matrix of 160 by 96 (2 mm x 2.5 mm x 8 mm), with a ±125 kHz receiver bandwidth. The TR was 10.2 ms for an echo-train length of 4, and the total breathhold length was 24 heartbeats for the true TR resolution scan. The lower temporal resolution data sets were extracted from the true TR data set to maintain slice prescription and ROI placement. View sharing was incorporated to maintain the number reconstructed image frames as the VPS was increased. Velocity images for each direction and the reference image were acquired in separate breath-holds. The gradients along each axis of the reference experiment were first moment nulled so that the phase information contained in the reference images was not velocity dependent, and could thus be used as a reference for all three velocity directions (i.e. the four point approach [2])." @default.
• W2289235321 created "2016-06-24" @default.
• W2289235321 creator A5030841413 @default.
• W2289235321 creator A5046259568 @default.
• W2289235321 date "2001-01-01" @default.
• W2289235321 modified "2023-09-27" @default.
• W2289235321 title "High Temporal Resolution Multi-Echo Phase Contrast MRI" @default.
• W2289235321 cites W1972328525 @default.
• W2289235321 hasPublicationYear "2001" @default.
• W2289235321 type Work @default.
• W2289235321 sameAs 2289235321 @default.
• W2289235321 citedByCount "0" @default.
• W2289235321 crossrefType "journal-article" @default.
• W2289235321 hasAuthorship W2289235321A5030841413 @default.
• W2289235321 hasAuthorship W2289235321A5046259568 @default.
• W2289235321 hasConcept C106131492 @default.
• W2289235321 hasConcept C111919701 @default.
• W2289235321 hasConcept C119666444 @default.
• W2289235321 hasConcept C120665830 @default.
• W2289235321 hasConcept C121332964 @default.
• W2289235321 hasConcept C126838900 @default.
• W2289235321 hasConcept C140779682 @default.
• W2289235321 hasConcept C143409427 @default.
• W2289235321 hasConcept C154945302 @default.
• W2289235321 hasConcept C157787499 @default.
• W2289235321 hasConcept C205372480 @default.
• W2289235321 hasConcept C2776502983 @default.
• W2289235321 hasConcept C2778751112 @default.
• W2289235321 hasConcept C2779426996 @default.
• W2289235321 hasConcept C31258907 @default.
• W2289235321 hasConcept C31972630 @default.
• W2289235321 hasConcept C41008148 @default.
• W2289235321 hasConcept C44280652 @default.
• W2289235321 hasConcept C62520636 @default.
• W2289235321 hasConcept C71924100 @default.
• W2289235321 hasConceptScore W2289235321C106131492 @default.
• W2289235321 hasConceptScore W2289235321C111919701 @default.
• W2289235321 hasConceptScore W2289235321C119666444 @default.
• W2289235321 hasConceptScore W2289235321C120665830 @default.
• W2289235321 hasConceptScore W2289235321C121332964 @default.
• W2289235321 hasConceptScore W2289235321C126838900 @default.
• W2289235321 hasConceptScore W2289235321C140779682 @default.
• W2289235321 hasConceptScore W2289235321C143409427 @default.
• W2289235321 hasConceptScore W2289235321C154945302 @default.
• W2289235321 hasConceptScore W2289235321C157787499 @default.
• W2289235321 hasConceptScore W2289235321C205372480 @default.
• W2289235321 hasConceptScore W2289235321C2776502983 @default.
• W2289235321 hasConceptScore W2289235321C2778751112 @default.
• W2289235321 hasConceptScore W2289235321C2779426996 @default.
• W2289235321 hasConceptScore W2289235321C31258907 @default.
• W2289235321 hasConceptScore W2289235321C31972630 @default.
• W2289235321 hasConceptScore W2289235321C41008148 @default.
• W2289235321 hasConceptScore W2289235321C44280652 @default.
• W2289235321 hasConceptScore W2289235321C62520636 @default.
• W2289235321 hasConceptScore W2289235321C71924100 @default.
• W2289235321 hasLocation W22892353211 @default.
• W2289235321 hasOpenAccess W2289235321 @default.
• W2289235321 hasPrimaryLocation W22892353211 @default.
• W2289235321 hasRelatedWork W1513968907 @default.
• W2289235321 hasRelatedWork W1964272934 @default.
• W2289235321 hasRelatedWork W1993613096 @default.
• W2289235321 hasRelatedWork W2078993896 @default.
• W2289235321 hasRelatedWork W2097261304 @default.
• W2289235321 hasRelatedWork W2110522892 @default.
• W2289235321 hasRelatedWork W2116856556 @default.
• W2289235321 hasRelatedWork W2184141818 @default.
• W2289235321 hasRelatedWork W2188419212 @default.
• W2289235321 hasRelatedWork W2550181570 @default.
• W2289235321 hasRelatedWork W337959830 @default.
• W2289235321 hasRelatedWork W1525355815 @default.
• W2289235321 hasRelatedWork W2183415816 @default.
• W2289235321 hasRelatedWork W2184892982 @default.
• W2289235321 hasRelatedWork W2186195816 @default.
• W2289235321 hasRelatedWork W2186589819 @default.
• W2289235321 hasRelatedWork W2187473252 @default.
• W2289235321 hasRelatedWork W2188254512 @default.
• W2289235321 hasRelatedWork W2291153522 @default.
• W2289235321 hasRelatedWork W2607935113 @default.
• W2289235321 isParatext "false" @default.
• W2289235321 isRetracted "false" @default.
• W2289235321 magId "2289235321" @default.
• W2289235321 workType "article" @default.