Deformable Image Registration of Liver With Consideration of Lung Sliding Motion
文献类型：期刊论文
| 作者 | Yaoqin Xie; Ming Chao; Guanglei Xiong |
| 刊名 | MEDICAL PHYSICS
 |
| 出版日期 | 2011 |
| 卷号 | 38期号:10页码:5351-5361 |
| 英文摘要 | Purpose:A feature based deformable registration model with sliding transformation was developed in the upper abdominal region for livercancer.Methods:A two-step thin-plate spline (bi-TPS) algorithm was implemented to deformably register the liverorgan. The first TPS registration was performed to exclusively quantify the sliding displacement component. A manual segmentation of the thoracic and abdominal cavity was performed asa priori knowledge. Tissue feature points were automatically identified inside the segmented contour on the images. The scale invariant feature transform method was utilized to match feature points that served as landmarks for the subsequent TPS registration to derive the sliding displacement vector field. To a good approximation, only motion along superior/inferior (SI) direction of voxels on each slice was averaged to obtain the sliding displacement for each slice. A second TPS transformation, as the last step, was carried out to obtain the local deformation field. Manual identification of bifurcation on liver, together with the manual segmentation of liverorgan, was employed as a “ground truth” for assessing the algorithm’s performance.Results:The proposed two-step TPS was assessed with six liver patients. The average error of liverbifurcation between manual identification and calculation for these patients was less than 1.8 mm. The residual errors between manual contour and propagated contour of liverorgan using the algorithm fell in the range between 2.1 and 2.8 mm. An index of Dice similarity coefficient (DSC) between manual contour and calculated contour for livertumor was 93.6% compared with 71.2% from the conventional TPS calculation.Conclusions:A high accuracy (∼2 mm) of the two-step feature based TPS registration algorithm was achievable for registering the liverorgan. The discontinuous motion in the upper abdominal region was properly taken into consideration. Clinical implementation of the algorithm will find broad application in radiation therapy of livercancer. |
| 收录类别 | SCI |
| 原文出处 | http://scitation.aip.org/content/aapm/journal/medphys/38/10/10.1118/1.3633902 |
| 语种 | 英语 |
| 源URL | [http://ir.siat.ac.cn:8080/handle/172644/3480]  |
| 专题 | 深圳先进技术研究院_医工所 |
| 作者单位 | MEDICAL PHYSICS |
| 推荐引用方式 GB/T 7714 | Yaoqin Xie,Ming Chao,Guanglei Xiong. Deformable Image Registration of Liver With Consideration of Lung Sliding Motion[J]. MEDICAL PHYSICS,2011,38(10):5351-5361. |
| APA | Yaoqin Xie,Ming Chao,&Guanglei Xiong.(2011).Deformable Image Registration of Liver With Consideration of Lung Sliding Motion.MEDICAL PHYSICS,38(10),5351-5361. |
| MLA | Yaoqin Xie,et al."Deformable Image Registration of Liver With Consideration of Lung Sliding Motion".MEDICAL PHYSICS 38.10(2011):5351-5361. |
入库方式： OAI收割
来源：深圳先进技术研究院
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