scholarly journals Comparison of 2D and 3D clustering on short-axis magnetic resonance images of the left ventricle

2004 ◽  
Vol 1268 ◽  
pp. 1371 ◽  
Author(s):  
M. Lynch ◽  
O. Ghita ◽  
P. Whelan
Keyword(s):  
Magnetic Resonance ◽  
Left Ventricle ◽  
Magnetic Resonance Images ◽  
Short Axis ◽  
2D And 3D

Optimizing the automatic segmentation of the left ventricle in magnetic resonance images

2005 ◽  
Vol 32 (2) ◽  
pp. 369-375 ◽  
Author(s):  
E. Angelié ◽  
P. J. H. de Koning ◽  
M. G. Danilouchkine ◽  
H. C. van Assen ◽  
G. Koning ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Left Ventricle ◽  
Automatic Segmentation ◽  
Magnetic Resonance Images

Transmural gradients of cardiac myofiber shortening in aortic valve stenosis patients using MRI tagging

2002 ◽  
Vol 283 (4) ◽  
pp. H1609-H1615 ◽  
Author(s):  
A. Van der Toorn ◽  
P. Barenbrug ◽  
G. Snoep ◽  
F. H. Van der Veen ◽  
T. Delhaas ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Aortic Valve ◽  
Left Ventricle ◽  
Aortic Valve Stenosis ◽  
Mean Value ◽  
Control Group ◽  
Contractile Dysfunction ◽  
Short Axis ◽  
Magnetic Resonance Tagging ◽  
The Mean

Aortic valve stenosis impairs subendocardial perfusion with a risk of irreversible subendocardial tissue damage. A likely precursor of damage is subendocardial contractile dysfunction, expressed by the parameter TransDif, which is defined as epicardial minus endocardial myofiber shortening, normalized to the mean value. With the use of magnetic resonance tagging in two short-axis slices of the left ventricle (LV), TransDif was derived from LV torsion and contraction during ejection. TransDif was determined in healthy volunteers (control, n = 9) and in patients with aortic valve stenosis before (AVSten, n = 9) and 3 mo after valve replacement (AVRepl, n = 7). In the control group, TransDif was 0.00 ± 0.14 (mean ± SD). In the AVSten group, TransDif increased to 0.96 ± 0.62, suggesting impairment of subendocardial myofiber shortening. In the AVRepl group, TransDif decreased to 0.37 ± 0.20 but was still elevated. In eight of nine AVSten patients, the TransDif value was elevated individually ( P < 0.001), suggesting that the noninvasively determined parameter TransDif may provide important information in planning of treatment of aortic valve stenosis.

scholarly journals Articulatory characterization of the alveolar sibilant fricatives of Basque: Part one

Loquens ◽  
2021 ◽  
Vol 7 (2) ◽  
pp. e073
Author(s):  
Alexander Iribar Ibabe ◽  
Rosa Miren Pagola Petrirena ◽  
Itziar Túrrez Aguirrezabal
Keyword(s):  
Magnetic Resonance ◽  
Magnetic Resonance Images ◽  
Qualitative And Quantitative ◽  
Quantitative Parameters ◽  
Sibilant Fricatives ◽  
2D And 3D

An articulatory analysis of the two alveolar sibilant fricatives of Basque (<z> and <s>) is presented, based on fifteen collections of 2D and 3D magnetic resonance images. By applying a set of phonetic, qualitative and quantitative parameters, two articulatory models for <z> and three for <s> are identified, and the procedures used to distinguish between them are examined. The main models are: dorsal denti-alveolar for <z> and apico-alveolar for <s>. Due to its length, the work is presented in two separate parts.

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