Feasibility of endocardial edge detection by using an inversion recovery artifact
| Autor: | Jean-Louis Barat, Michel Montaudon, Dominique Ducassou, Eric Laffon, Philippe Massot, Christelle Cassen, Valérie Latrabe, François Laurent |
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| Rok vydání: | 2001 |
| Předmět: |
Adult
Male Ejection fraction Materials science Pixel Phantoms Imaging Systole Stroke Volume Left Ventricles Inversion recovery Image Enhancement Magnetic Resonance Imaging Edge detection Ventricular Function Left Nuclear magnetic resonance Diastole Reference Values Healthy volunteers Image Processing Computer-Assisted Humans Radiology Nuclear Medicine and imaging Female Artifacts Endocardium |
| Zdroj: | Journal of magnetic resonance imaging : JMRI. 13(3) |
| ISSN: | 1053-1807 |
| Popis: | An inversion recovery (IR) artifact was used to delineate the blood/wall boundary in left ventricles. The artifact consisted of a hypointensity signal in pixels located at the boundary of two contiguous tissues with different T1 relaxation times. The feasibility of measuring the ejection fraction using the artifact was tested in ten healthy volunteers, with two IR snapshot-FLASH sequences possessing different times of repetition (TR = 11msec and TR = 3.5msec) and appropriate times of inversion. The comparison with a cine-MRI sequence showed that ejection fraction measurements are feasible when performed with a snapshot-FLASH sequence that has a sufficiently short TR (3.5msec). J. Magn. Reson. Imaging 2001;13:461–466. © 2001 Wiley-Liss, Inc. |
| Databáze: | OpenAIRE |
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