Long Bone X-ray Image Stitching Using C-arm Motion Estimation
نویسندگان
چکیده
In this paper, we propose a novel method to generate panoramic X-ray images intra-operatively by using the previously introduced camera augmented mobile C-arm by Navab et al. [1]. This advanced mobile C-arm system acquires registered X-ray and optical images by construction, which facilitates the generation of panoramic X-ray images based on the motion estimation of the X-ray source. Visual marker tracking is employed to estimate the camera motion and this estimated motion is also applied to the X-ray source. Our proposed method is suitable and practical for intra-operative usage generating panoramic X-ray images without the requirement of a fronto-parallel setup and overlapping X-ray images. The results show that the panoramic X-ray images generated by our method are accurate enough (errors less than 1%) for metric measurements and promise suitability for intra-operative clinical applications in trauma surgery.
منابع مشابه
Image Stitching of the Computed Radiology images Using a Pixel-Based Approach
In this paper, a method for automatic stitching of radiology images based on pixel features has been presented. In this method, according to the smooth texture of radiological images and in order to increase the number of the extracted features after quality enhancement of initial radiology images, 45 degree isotropic mask is applied to each radiology image to observe the image details. After t...
متن کاملClinical Data Evaluation of C-arm-based Motion Compensated Coronary Artery Reconstruction
Angiographic C-arm systems are capable of performing computed tomography (CT) imaging for assisting in therapy planning, performance and assessment. Due to the long acquisition time, C-arm CT of dynamic structures is challenging. Cardiac motion has to be estimated and compensated in the reconstruction step. The quality of the motion estimation algorithm mainly dictates the resulting image quali...
متن کاملRespiratory Motion Estimation Using a 3D Diaphragm Model
Long acquisition times of several seconds lead to image artifacts in cardiac C-arm CT. These 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 diaphragm motion is correlated to the respiration-induced motion of the heart. We present a met...
متن کاملRespiratory Motion Compensation for C-Arm CT Liver Imaging
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...
متن کاملEpipolar Consistency Conditions for Motion Correction in Weight-Bearing Imaging
Recent C-arm CT systems allow for the examination of a patient’s knees under weight-bearing conditions. The standing patient tends to show involuntary motion, which introduces motion artifacts in the reconstruction. The state-of-the-art motion correction approach uses fiducial markers placed on the patients’ skin to estimate rigid leg motion. Marker placement is tedious, time consuming and asso...
متن کامل