VOXEL CLASSIFICATION OF PERIPROSTHETIC TISSUES IN CLINICAL COMPUTED TOMOGRAPHY OF LOOSENED HIP PROSTHESES

被引:1
作者
Malan, D. F. [1 ,2 ]
Botha, C. P. [2 ,3 ]
Nelissen, R. G. H. H. [1 ]
Valstar, E. R. [1 ,4 ]
机构
[1] Leiden Univ, Med Ctr, Dept Orthopaed, Leiden, Netherlands
[2] Delft Univ Technol, Dept Mediamat, Med Visualizat Grp, NL-2600 AA Delft, Netherlands
[3] Leiden Univ Med Ctr, Dept Radiol, Leiden, Netherlands
[4] Delft Univ Technol, Fac 3ME, Dept Biomech Engn, Delft, Netherlands
来源
2010 7TH IEEE INTERNATIONAL SYMPOSIUM ON BIOMEDICAL IMAGING: FROM NANO TO MACRO | 2010年
关键词
Automatic; classification; segmentation; computed tomography; periprosthetic; osteolysis; SEGMENTATION; RADIOGRAPHS; MRI; CT;
D O I
10.1109/ISBI.2010.5490245
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
We present an automated algorithm which classifies periprosthetic tissues in CT scans of patients with loosened hip prostheses. To our knowledge this is the first application of CT voxel classification to periprosthetic tissues of the hip. We use several image features including multi-scale image intensity, multi-scale image gradient and distance metrics. Seven classifier types were trained using five manually segmented clinical CT datasets, and their classification performance compared to manual segmentations using a leave-one-out scheme. Using this technique we are able to correctly segment the majority of each of the six tissue categories, in spite of low bone densities, metal-induced CT imaging artefacts and inter-patient and inter-scan variation. Our automated classifier forms a pragmatic first step towards eventual automatic tissue segmentation.
引用
收藏
页码:1341 / 1344
页数:4
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