MULTIVIEW 3-D ECHOCARDIOGRAPHY FUSION WITH BREATH-HOLD POSITION TRACKING USING AN OPTICAL TRACKING SYSTEM

作者：Punithakumar Kumaradevan; Hareendranathan Abhilash R; McNulty Alexander; Biamonte Marina; He Allen; Noga Michelle; Boulanger Pierre; Becher Harald

来源：Ultrasound in Medicine and Biology, 2016, 42(8): 1998-2009.

DOI：10.1016/j.ultrasmedbio.2016.03.019

• Multiview fusion
• Echocardiography
• Wavelet transformation
• Optical tracking
• Electrocardiogram

Recent advances in echocardiography allow real-time 3-D dynamic image acquisition of the heart. However, one of the major limitations of 3-D echocardiography is the limited field of view, which results in an acquisition insufficient to cover the whole geometry of the heart. This study proposes the novel approach of fusing multiple 3-D echocardiography images using an optical tracking system that incorporates breath-hold position tracking to infer that the heart remains at the same position during different acquisitions. In six healthy male volunteers, 18 pairs of apical/parasternal 3-D ultrasound data sets were acquired during a single breath-hold as well as in subsequent breath-holds. The proposed method yielded a field of view improvement of 35.4 +/- 12.5%. To improve the quality of the fused image, a wavelet-based fusion algorithm was developed that computes pixelwise likelihood values for overlapping voxels from multiple image views. The proposed wavelet-based fusion approach yielded significant improvement in contrast (66.46 +/- 21.68%), contrast-to-noise ratio (49.92 +/- 28.71%), signal-to-noise ratio (57.59 +/- 47.85%) and feature count (13.06 +/- 7.44%) in comparison to individual views. (E-mail: punithak@ualberta.

• 出版日期2016-8