Abstract #2898

Whole heart coronary MRA using image-based 2D navigator (iNav) and conventional Nav system: comparison of image quality and scan time

Kazuo Kodaira¹, Michinobu Nagao², Masami Yoneyama³, Yasutomo Katsumata³, Takumi Ogawa¹, Yutaka Hamatani¹, Isao Shiina¹, Yasuhiro Goto¹, Mamoru Takeyama¹, Isao Tanaka¹, and Shuji Sakai²

¹Department of Radiological Services, Tokyo Women's Medical University Hospital, tokyo, Japan, ²Department of Diagnostic imaging & Nuclear Medicine, Tokyo Women's Medical University Hospital, tokyo, Japan, ³Philips Japan, tokyo, Japan

Diaphragmatic one-dimensional navigation (NAV) is the conventional approach for CMRA respiratory motion compensation. This method has limitations such as the cumbersomeness of setting NAV and giving stresses to patients by wrapping the compression band around the chest/abdomen for minimizing respiratory artifacts. Image-based 2D navigator (iNAV) can solve this limitation because it directly corrects the translational movement of the heart in two directions (R-L and F-H) by using 2D real-time imaging. We investigate the feasibility of iNAV with loosely wrapped abdominal compression band compared to the conventional NAV approach.

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