Abstract #0322

Dynamic assessment of atrioventricular junction (AVJ) based on radial long-axis cine cardiac MR imaging

Shuang Leng¹, Shuo Zhang², Xiaodan Zhao¹, Baoru Leong¹, Yiying Han¹, Yasutomo Katsumata³, Stuart Cook^1,4, Ru San Tan^1,4, and Liang Zhong^1,4

¹National Heart Centre Singapore, Singapore, Singapore, ²Philips Healthcare Singapore, Singapore, Singapore, ³Philips Healthcare Japan, Tokyo, Japan, ⁴Duke-NUS Graduate Medical School Singapore, Singapore, Singapore

We have developed a semi-automatic tracking system of atrioventricular junction (AVJ) deformation with two-, three-, and four-chamber cardiovascular magnetic resonance (CMR) long-axis images¹. In this study, we applied the feature-tracking technique in 18 radial rotational long-axis cine CMR planes and evaluated the motion of 36 evenly located AVJ points. Results have shown that 1) the obtained average AVJ velocities (Sm, Em and Am) and maximal displacements are independent of the number of AVJ points selected, and 2) the routinely acquired CMR imaging generated in clinical practice are sufficient enough for dynamic assessment of AVJ deformation.

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