Dynamic dual-energy chest radiography: a potential tool for lung tissue motion monitoring and kinetic study.
Dynamic dual-energy chest radiography: a potential tool for lung tissue motion monitoring and kinetic study.
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DOI：
10.1088/0031-9155/56/4/019
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发表时间：
2011-02-21
影响因子：
3.5
通讯作者：
Molloi S
中科院分区：
文献类型：
--
作者：
Xu T;Ducote JL;Wong JT;Molloi S
Dual-energy chest radiography has the potential to provide better diagnosis of lung disease by removing the bone signal from the image. Dynamic dual-energy radiography is now possible with the introduction of digital flat panel detectors. The purpose of this study is to evaluate the feasibility of using dynamic dual-energy chest radiography for functional lung imaging and tumor motion assessment. The dual energy system used in this study can acquire up to 15 frame of dual-energy images per second. A swine animal model was mechanically ventilated and imaged using the dual-energy system. Sequences of soft-tissue images were obtained using dual-energy subtraction. Time subtracted soft-tissue images were shown to be able to provide information on regional ventilation. Motion tracking of a lung anatomic feature (a branch of pulmonary artery) was performed based on an image cross-correlation algorithm. The tracking precision was found to be better than 1 mm. An adaptive correlation model was established between the above tracked motion and an external surrogate signal (temperature within the tracheal tube). This model is used to predict lung feature motion using the continuous surrogate signal and low frame rate dual-energy images (0.1 to 3.0 frames /sec). The average RMS error of the prediction was (1.1 ± 0.3) mm. The dynamic dual-energy was shown to be potentially useful for lung functional imaging such as regional ventilation and kinetic studies. It can also be used for lung tumor motion assessment and prediction during radiation therapy.
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影响因子：
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DOI：
10.1016/j.ijrobp.2003.12.035
发表时间：
2004-07-15
影响因子：
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