Profile analysis of ventricle specimen based on a new phase measuring method

Yiping Cao; Xianyu Su; Wenjing Chen; Liqun Xiang; Qichan Zhang; Yuankun Liu

doi:10.1117/12.843234

28 October 2009 Profile analysis of ventricle specimen based on a new phase measuring method

Yiping Cao, Xianyu Su, Wenjing Chen, Liqun Xiang, Qichan Zhang, Yuankun Liu

Proceedings Volume 7519, Eighth International Conference on Photonics and Imaging in Biology and Medicine (PIBM 2009); 751918 (2009) https://doi.org/10.1117/12.843234
Event: Photonics and Optoelectronics Meetings 2009, 2009, Wuhan, China

Abstract

The size and shape of ventricle are very important to analyze and diagnose pathology of human heart. So it is very necessary to measure the profile of ventricle. It is very difficult to measure the ventricle by vivisectional method for its unique function of heart, so the ventricle specimen is adopted to be measured. Three-dimensional (3D) automatic measurement methods are widely used in many fields. In Biology and Medicine society, it can be applicable for surgery, orthopedics, viscera disease analysis and diagnosis etc. Here a new method to measure the 3D surface of ventricle specimen is proposed. Although the traditional 3D measuing method with equal or stated phase-shifting step length possess excellent accuracy, they are much dependent on the consistency of these phase-shifting step lengths. In fact, this condition is very difficult to guarantee. which may lead to the incorrect wrapped phase and incorrect phase unwrapping in some regions, even the reconstructed object may be misshapen or anamorphic. In the proposed method, a novel improved three undecided step lengths phase-shifting algorithm with three unequal phase-shifting steps has been presented detailed and is applied to measure the profile of ventricle sucssesfully. Experiments show that the improved algorithm can not only effectively improve the measuring accuracy, but also branch out its application.

Citation Download Citation

Yiping Cao, Xianyu Su, Wenjing Chen, Liqun Xiang, Qichan Zhang, and Yuankun Liu "Profile analysis of ventricle specimen based on a new phase measuring method", Proc. SPIE 7519, Eighth International Conference on Photonics and Imaging in Biology and Medicine (PIBM 2009), 751918 (28 October 2009); https://doi.org/10.1117/12.843234

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KEYWORDS

3D metrology

Phase shifts

Heart

3D image processing

Charge-coupled devices

Phase shifting

Surgery

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