Fully automatic extraction of human spine curve from MR images using methods of efficient intervertebral disk extraction and vertebra registration
| Autor: | Josef Pauli, Zhenyu Tang |
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| Rok vydání: | 2010 |
| Předmět: |
Computer science
Biomedical Engineering Health Informatics Spinal Curvatures Gait (human) Human spine Active shape model Image Processing Computer-Assisted medicine Humans Radiology Nuclear Medicine and imaging Computer vision Intervertebral Disc Lumbar Vertebrae business.industry General Medicine Magnetic Resonance Imaging Computer Graphics and Computer-Aided Design Computer Science Applications Vertebra Informatik Intervertebral disk medicine.anatomical_structure Fully automatic Surgery Computer Vision and Pattern Recognition Artificial intelligence Mr images business human activities Algorithms |
| Zdroj: | International Journal of Computer Assisted Radiology and Surgery. 6:21-33 |
| ISSN: | 1861-6429 1861-6410 |
| Popis: | A fully automatic method is proposed for extracting human spine curve which is required for gait modeling. By means of the gait modeling, origin of the gait pathology of patients could be found.Our method is composed of two parts. The first part is the extraction of intervertebral disk positions where an efficient method is proposed. At the beginning of this part, all possible positions of intervertebral disks are located using a gradient-based method. Then, non-intervertebral disks are filtered out by a graph-based and an active shape model-based methods. In the second part, extracted disk positions are used by a vertebra registration method to segment spine vertebrae. Finally, spine curve is obtained by interpolating centers of segmented vertebrae using cubic spline.We tested our method with 13 MR data sets of patients. All disk positions of each MR data set were correctly extracted in the first part. The mean deviation of centers of segmented vertebrae that were obtained in the second part and used to interpolate spine curve was around 1.4 mm.Our method achieves a fully automatic extraction of the spine curve. The extraction of intervertebral disk positions in the first part of our method when compared to model-based methods and manual selection which were proposed in other papers is highly efficient. In the second part including the vertebra registration, a new similarity measurement method, which is used to guide the vertebra atlas fitting process, is proposed to solve the problem of changes in overlap. Through our experiment, results of spine curves are at a highly accurate level. |
| Databáze: | OpenAIRE |
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