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ECOLE SUPÉRIEURE D'ÉLECTRICITÉ Une grande école d'ingénieurs au cœur des sciences de l'information,de l'énergie et des systèmes |
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Conference papers
Free breathing black-blood systolic imaging using heart rate prediction and motion compensated reconstruction
Abstract : Double Inversion Recovery Fast Spin Echo (DIR-FSE) sequences, resulting in black-blood images, are widespread in cardiac exams [1] as high resolution and great contrast between heart cavities and walls are achieved. For these sequences, DIR pulses are generally played on the R wave and the inversion time (TI) needed to cancel blood signal (~500ms) only allows diastolic view of the heart. Cardiac contraction is complete at end systole so myocardium can be better observed during this short phase. To perform systolic acquisitions, DIR pulses have to be placed before the R wave in the previous heart cycle and RR interval prediction is mandatory. Moreover, as systole is generally shorter than diastole, shorter echo trains are desirable, resulting in longer acquisition time incompatible with breath hold. A method which combines (i) heart rate prediction [2], (ii) respiratory motion estimation [3] and (iii )motion compensated construction [4] is presented. It allows free breathing black-blood systolic imaging and has been tested on five subjects.
https://hal-supelec.archives-ouvertes.fr/hal-00437025
Contributor : Sébastien van Luchene Connect in order to contact the contributor
Submitted on : Saturday, November 28, 2009 - 2:59:07 PM
Last modification on : Saturday, October 16, 2021 - 11:18:08 AM
Contributor : Sébastien van Luchene Connect in order to contact the contributor
Submitted on : Saturday, November 28, 2009 - 2:59:07 PM
Last modification on : Saturday, October 16, 2021 - 11:18:08 AM