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公开(公告)号：EP1614070A1
公开(公告)日：2006-01-11
申请号：EP04703432.7
申请日：2004-01-20
申请人： ELEKTA AB (publ.)
发明人： LAMBERT, Zijp The Netherlands Cancer Institute , BROWN, Kevin John , JAFFRAY, David , SIEWERDSEN, Jeffrey , VAN HERK, Marcel , SONKE, Jan-Jakob
CPC分类号： G06T5/009 , A61N5/1064 , G06T5/003 , G06T7/0016 , G06T7/20 , G06T11/005 , G06T2207/10081 , G06T2207/20068 , G06T2207/20192 , G06T2207/30061 , G06T2207/30096 , G06T2211/412
摘要： Artifacts in the reconstructed volume data of cone beam CT systems can be removed by the application of respiration correlation techniques to the acquired projection images. To achieve this, the phase of the patients breathing is monitored while acquiring projection images continuously. On completion of the acquisition, projection images that have comparable breathing phases can be selected from the complete set, and these are used to reconstruct the volume data using similar techniques to those of conventional CT. Any phase can be selected and therefore the effect of breathing can be studied. It is also possible to use a feature in the projection images such as the patient's diaphragm to determine the breathing phase. This feature in the projection images can be used to control delivery of therapeutic radiation dependent on the patient's breathing cycle, to ensure that the tumor is in the correct position when the radiation is delivered.
摘要翻译： 通过将呼吸相关技术应用于所采集的投影图像，可以消除锥束CT系统的重建体数据中的伪影。 为了实现这个目标，在连续采集投影图像的同时监测患者呼吸的阶段。 完成采集后，可以从整套设备中选择具有可比较呼吸阶段的投影图像，并且这些投影图像用于使用与常规CT类似的技术重建体数据。 任何阶段都可以选择，因此可以研究呼吸的影响。 也可以在投影图像中使用特征，例如患者的膈肌来确定呼吸阶段。 投影图像中的这一特征可用于控制取决于患者呼吸周期的治疗辐射的输送，以确保当辐射被递送时肿瘤处于正确的位置。
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公开(公告)号：EP1614070B1
公开(公告)日：2006-12-06
申请号：EP04703432.7
申请日：2004-01-20
申请人： ELEKTA AB (publ.)
发明人： LAMBERT, Zijp The Netherlands Cancer Institute , BROWN, Kevin John , JAFFRAY, David , SIEWERDSEN, Jeffrey , VAN HERK, Marcel , SONKE, Jan-Jakob
CPC分类号： G06T5/009 , A61N5/1064 , G06T5/003 , G06T7/0016 , G06T7/20 , G06T11/005 , G06T2207/10081 , G06T2207/20068 , G06T2207/20192 , G06T2207/30061 , G06T2207/30096 , G06T2211/412
摘要： Artifacts in the reconstructed volume data of cone beam CT systems can be removed by the application of respiration correlation techniques to the acquired projection images. To achieve this, the phase of the patients breathing is monitored while acquiring projection images continuously. On completion of the acquisition, projection images that have comparable breathing phases can be selected from the complete set, and these are used to reconstruct the volume data using similar techniques to those of conventional CT. Any phase can be selected and therefore the effect of breathing can be studied. It is also possible to use a feature in the projection images such as the patient's diaphragm to determine the breathing phase. This feature in the projection images can be used to control delivery of therapeutic radiation dependent on the patient's breathing cycle, to ensure that the tumor is in the correct position when the radiation is delivered.
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