Meeting Banner
Abstract #2281

Reconstruction of Accelerated Dynamic Contrast-Enhanced Lung MR Imaging Using Phase-Correlation Motion Estimation and Motion Compensation

Mei-Lan Chu1, Jia-Shuo Hsu1, Hsiao-Wen Chung1, Shang-Yueh Tsai2, 3, Yi-Ru Li4

1Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, Taipei, Taiwan; 2Graduate Institute of Applied Physics, National Chengchi University, Taipei, Taiwan; 3Research Center for Mind, Brain and Learning, National Chengchi University, Taipei, Taiwan; 4Department of Electronic Engineering, National Taiwan University of Science and Technolo, Taipei, Taiwan

Phase-correlation motion estimation (ME) and motion compensation (MC), which is an essential part of video compression technique, has been successfully applied to reconstructing under-sampled cine cardiac imaging. For dynamic MR imaging outside of the cardiac region, such as dynamic contrast-enhanced (DCE) perfusion lung imaging, higher temporal resolution for wider slice coverage is still highly desirable. In this abstract, we demonstrate that the drawbacks of temporal-smoothing and baseline overshoot can be overcome by using phase-correlation ME / MC with 2-fold to 6-fold acceleration. The experimental results show that the proposed method successfully reconstructs full-resolution dynamic frames at substantially reduced acquisition data without the disadvantages of overshooting in the initial time frames and the undesired smoothing effects in the presence of abrupt temporal variations.

Abstract PDF Poster PDF

Keywords

abrupt abstract accelerated accelerating acceleration according accurately achieve acquisition addition affected agent applied applying arrows benchmarking biomedical blast block blocks blue bottom brain called cardiac caused central cine column comparable compensation containing contrast coronal correlation counter coverage cross dashed desirable details domain drawbacks dynamic dynamics electronic electronics encoding engineering enhanced error errors estimation even experimental extended feasibility fold frame frames full functional gall graduate green hardly highly illustrated improperly improved indicate indicated individual initial institute intensity known largely learning locating lost lung manner matrix measures middle mind motion multiplication national outside overall overcome overshooting part partially particularly pattern perfusion physics picked potential prepared presence preservation preserved preserves property proposed pulmonary reconstructed reconstructing reconstruction reconstructs reduced reflected resolution restricted reveal robust sampled sampling science segmented series several since slice smoothed smoothing spatial square still substantially successfully temporal theory training translation typically undesired validated variation variations varying vector versus video wash wider yellow