3D projection reconstruction based respiratory motion correction technique for free-breathing coronary MRA
نویسندگان
چکیده
INTRODUCTION: Respiratory motion is one of the major challenges for coronary MRA. Current navigator based free-breathing techniques measure the position of the diaphragm and use a fixed correlation factor to estimate the position of the heart. Such techniques suffer from errors due to the indirect estimation of heart position and are plagued by low scan efficiencies (typically between 30 and 50 %). The purpose of this work was to develop a 3D projection reconstruction (3D PR) based coronary MRA technique which accepts all the data during the scan, irrespective of respiratory position, and retrospectively corrects for respiratory motion by using 3D image registration.
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