Cardiac C-Arm CT: A Unified Framework for Motion Estimation and Dynamic CT
نویسندگان
چکیده
منابع مشابه
Diaphragm Tracking for Respiratory Motion Compensated Cardiac C-Arm CT
Long acquisition times of several seconds lead to image artifacts in cardiac C-arm CT. While ECG gating is able to select a certain heart phase, residual artifacts are mostly caused by respiratory motion. In order to improve image quality, it is important to accurately estimate the breathing motion that occurred during image acquisition. It has been shown that diaphragmmotion is correlated to t...
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The acquisition of data for cardiac imaging using a C-arm computed tomography system requires several seconds and multiple heartbeats. Hence, incorporation of motion correction in the reconstruction step may improve the resulting image quality. Cardiac motion can be estimated by deformable three-dimensional (3D)/3D registration performed on initial 3D images of different heart phases. This moti...
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Image guidance during cardiac interventional procedures (IP) using cardiac C-arm CT systems is desirable for many procedures. Applying the concept of retrospective electrocardiogram gating (ECG) to the acquisition of multiple, ECG-triggered rotational acquisitions using a C-arm system allows the 3D+t reconstruction of the heart. The process of retrospective gating is a crucial component of 3-D ...
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In C-arm CT 3-D liver imaging, breathing leads to motion artifacts due to the relatively long acquisition time. Often, even with breath-holding residual respiratory motion can be observed. These artifacts manifest in blurring and interfere clinical investigations such as liver tissue imaging. For 3-D medical image reconstruction a respiratory motion estimation and compensation is required. In t...
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PURPOSE Detailed analysis of cardiac motion would be helpful for supporting clinical workflow in the interventional suite. With an angiographic C-arm system, multiple heart phases can be reconstructed using electrocardiogram gating. However, the resulting angular undersampling is highly detrimental to the quality of the reconstructed images, especially in nonideal intraprocedural imaging condit...
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ژورنال
عنوان ژورنال: IEEE Transactions on Medical Imaging
سال: 2009
ISSN: 0278-0062,1558-254X
DOI: 10.1109/tmi.2009.2025499