Two-Dimensional Image-Based Respiratory Navigator for Free-Breathing Coronary Magnetic Resonance Angiography
10.13104/imri.2018.22.1.71
- Author:
Taehoon SHIN
1
Author Information
1. Division of Mechanical and Biomedical Engineering, Ewha Womans University, Seoul, Korea. taehoons@ewha.ac.kr
- Publication Type:Original Article
- Keywords:
Motion correction;
Respiratory navigator;
Coronary angiography
- MeSH:
Coronary Angiography;
Coronary Vessels;
Diaphragm;
Healthy Volunteers;
Magnetic Resonance Angiography
- From:Investigative Magnetic Resonance Imaging
2018;22(1):71-77
- CountryRepublic of Korea
- Language:English
-
Abstract:
PURPOSE: To develop a two-dimensional (2D) image-based respiratory motion correction technique for free-breathing coronary magnetic resonance angiography (MRA). MATERIALS AND METHODS: The proposed respiratory navigator obtained aliased a 2D sagittal image from under-sampled k-space data and utilized motion correlation between the aliased images. The proposed navigator was incorporated into the conventional coronary MRA sequence including the diaphragm navigator and tested in three healthy subjects. RESULTS: The delineation of major coronary arteries was significantly improved using the proposed 2D motion correction (S/I and A/P) compared to one-dimensional (S/I) correction using the conventional diaphragm navigator. CONCLUSION: The 2D image-based respiratory navigator was proposed for free-breathing coronary angiography and showed the potential for improving respiratory motion correction compared to the conventional 1D correction.
