Abstract #1788

The Optimal Condition for Maintaining Uniform k-space Coverage after Retrospective Respiratory Gating in 3D Radial-Acquisition Imaging

Jinil Park^1,2, Taehoon Shin³, Soon Ho Yoon^4,5, Jin Mo Goo^4,5,6, and Jang-Yeon Park^1,2

¹Center for Neuroscience Imaging Research, Institute for Basic Science, Suwon, Korea, Republic of, ²Department of Biomedical Engineering, Sungkyunkwan University, Suwon, Korea, Republic of, ³Diagnostic Radiology and Nuclear Medicine, University of Maryland, Baltimore, MD, United States, ⁴Department of Radiology, Seoul National University College of Medicine, Seoul, Korea, Republic of, ⁵Institute of Radiation Medicine, Seoul National University Medical Research Center, Seoul, Korea, Republic of, ⁶Cancer Research Institute, Seoul National University, Seoul, Korea, Republic of

Radial-acquisition imaging is suitable for lung imaging because it allows a very short TE and a desirable degree of motion insensitivity. Despite its tolerance to motion artifacts, respiratory motion is still a major reason of causing image artifacts in lung imaging, which motivates the need for the respiratory gating. In retrospective-respiratory gating, it is significant to keep the k-space as uniform as possible after gating. In this study, we explore the optimal condition for obtaining uniform k-space coverage after retrospective gating in consideration of various breathing patterns.

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