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| Content Provider | PubMed Central |
|---|---|
| Author | Schneider, Robert J. Perrin, Douglas P. Vasilyev, Nikolay V. Marx, Gerald R. Nido, Pedro J. Del Howe, Robert D. |
| Copyright Year | 2011 |
| Abstract | Measurement of the shape and motion of the mitral valve annulus has proven useful in a number of applications, including pathology diagnosis and mitral valve modeling. Current methods to delineate the annulus from four-dimensional (4D) ultrasound, however, either require extensive overhead or user-interaction, become inaccurate as they accumulate tracking error, or they do not account for annular shape or motion. This paper presents a new 4D annulus segmentation method to account for these deficiencies. The method builds on a previously published three-dimensional (3D) annulus segmentation algorithm that accurately and robustly segments the mitral annulus in a frame with a closed valve. In the 4D method, a valve state predictor determines when the valve is closed. Subsequently, the 3D annulus segmentation algorithm finds the annulus in those frames. For frames with an open valve, a constrained optical flow algorithm is used to the track the annulus. The only inputs to the algorithm are the selection of one frame with a closed valve and one user-specified point near the valve, neither of which needs to be precise. The accuracy of the tracking method is shown by comparing the tracking results to manual segmentations made by a group of experts, where an average RMS difference of 1.67 ± 0.63 mm was found across 30 tracked frames. |
| Related Links | http://dx.doi.org/10.1016/j.media.2011.11.006 |
| Ending Page | 504 |
| Page Count | 8 |
| Starting Page | 497 |
| File Format | |
| ISSN | 13618415 |
| e-ISSN | 13618423 |
| Journal | Medical Image Analysis |
| Issue Number | 2 |
| Volume Number | 16 |
| Language | English |
| Publisher Date | 2012-02-01 |
| Access Restriction | Open |
| Subject Keyword | Radiological and Ultrasound Technology Health Informatics Radiology Nuclear Medicine and imaging Computer Vision and Pattern Recognition Computer Graphics and Computer-Aided Design Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Computer Graphics and Computer-Aided Design Radiology, Nuclear Medicine and Imaging Health Informatics Computer Vision and Pattern Recognition Radiological and Ultrasound Technology |
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