Arterial spin labelling
Robust estimation of the cerebral blood flow in arterial spin labelling
... of Arterial Spin Labelling (ASL) techniques in Magnetic Resonance Imaging (MRI) has made feasible a non-invasive measurement of the Cerebral Blood Flow ...
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An a contrario approach for the detection of patient-specific brain perfusion abnormalities with arterial spin labelling
... 1. Introduction Arterial Spin Labelling (ASL), a Magnetic Resonance Imaging (MRI) technique in- troduced in the early 1990’s (Detre et al., 1992), provides a measure of the level of perfusion as a ...
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From group to patient-specific analysis of brain function in arterial spin labelling and BOLD functional MRI
... subjects. Arterial Spin Labelling (ASL) sequences permit the measurement of perfusion with MRI using an endogenous contrast agent: the protons of blood ...
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Good edge-labelling of graphs
... 4 J. Araujo & N. Cohen & F. Giroire & F. Havet set of dipaths in a UPP-DAG has a good edge-labelling. Conversely, for any graph admitting a good edge-labelling one can exhibit a family of ...
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Good edge-labelling of graphs
... We also show large classes of good graphs. To do so, we use the notion of critical graph which is a bad graph, every proper subgraph of which is good. Clearly, a good edge-labelling of a graph induces a good ...
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Good edge-labelling of graphs.
... In their paper, they introduce the notion of good edge-labelling. An edge- labelling of a graph G is a function φ : E(G) → R. A path is increasing if the sequence of its edge labels is non-decreasing. An ...
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(d,1)-total labelling of graphs
... Unité de recherche INRIA Sophia Antipolis 2004, route des Lucioles - BP 93 - 06902 Sophia Antipolis Cedex France Unité de recherche INRIA Lorraine : LORIA, Technopôle de Nancy-Brabois - [r] ...
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Wireless Broadcast with short labelling
... [16]). Labelling schemes have been also used in [13] and [15] in order to improve the efficiency of Minimum Spanning Tree or Leader Election ...exploit labelling in order to improve the existing solutions ...
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Constant 2-labelling of weighted cycles
... We set A = {R k | k ∈ Z} and v = 0. A coloring φ : {0, . . . , p − 1} → {•, ◦} of a cycle C p is a constant 2-labelling if, for every k-rotation of the coloring, the weighted sum of black vertices is a constant a ...
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Accuracy of pulsed arterial spin labeling magnetic resonance imaging in the human brain : tag width and timing effects
... In this study, the accuracy of QUIPSS II (Quantitative Imaging of Perfusion using a Single Subtraction - second version) ASL for measuring flow changes during a global flo[r] ...
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Constant 2-labelling of a graph
... coloring is diagonal, we have ϕ(x) = ϕ(x + t) for t = (1, 1) and all x ∈ Z 2 . So we can apply the projection method. Moreover, by Theorem 5, ϕ is such that ϕ(x + (q, 0)) = ϕ(x) for some q ∈ N and all x ∈ Z 2 . Hence, it ...
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Pulmonary arterial hypertension.
... pulmonary arterial pressure is out of proportion to that expected from the elevation of left arterial pres- sure (transpulmonary gradient >12 mm Hg), and PVR is increased to ...
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Effective arterial elastance as an index of pulmonary arterial load
... Conclusions: Ea(PV) provides a convenient, useful and easier method to assess pulmonary arterial load and its impact on the right ventricle. Unlike classical mean pulmonary resistance that ignores waves ...
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Changes in brain perfusion in successive arterial spin labeling MRI scans in neonates with hypoxic-ischemic encephalopathy
... The Arterial Spin Labeling (ASL) MRI perfusion sequence is one of the most suitable imaging modalities owing to its non-invasive and non-irradiating ...
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Patient-specific detection of perfusion abnormalities combining within-subject and between-subject variances in Arterial Spin Labeling
... in Arterial Spin Labeling (ASL) were identified by comparing a sin- gle patient to a group of healthy controls using a mixed-effect hierarchical General Linear Model ...
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Arterial Spin Labeling at 3T in semantic dementia: perfusion abnormalities detection and comparison with FDG-PET
... Department of Radiology, University Hospital of Rennes, F-35033 Rennes, France 6 Department of Neurology, University Hospital of Rennes, F-35033 Rennes, France Abstract. Arterial Spin Labeling (ASL) is a ...
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L(2,1)-labelling of graphs
... differ by at least 2. Typically the maximum degree of G 1 is much larger than the maximum degree of G 2 . In the case of L(2, 1)-labelling, G 1 is the square of G 2 . We impose the condition that for some integer ...
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Étude de faisabilité : description de l'évolution du débit sanguin cérébral dans les séquences I.R.M en Arterial Spin Labeling (A.S.L) après un arrêt cardiaque
... Toutes ces techniques ont l’inconvénient d’être invasives et de nécessiter l’administration d’un traceur exogène. Plus récemment le doppler C a été étudié et retrouve des résultats similaires (12). Cependant cette ...
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Evaluation of functional arterial spin labeling data using a perfusion template
... functional arterial spin labeling data using a perfusion template Jan Petr 2,3* , Elise Bannier 4,5 , Hélène Raoult 1,2 , Jean-Christophe Ferré 1,2 , Jean-Yves Gauvrit 1,2 , Christian Barillot 2,3 From ...
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Labelling Operators
... 4. Conclusions As mentioned in the introduction, this paper does not describe any new concept. Its purpose is only to introduce various techniques to label sets or partitions. Very often, measuring is the last step of an ...
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