Long acquisition times lead to image artifacts in thoracic C-arm CT. Motion blur caused by respiratory motion leads to decreased image quality in many clinical applications. We introduce an image-based method to estimate and compensate respiratory motion in C-arm CT based on diaphragm motion. In order to estimate respiratory motion, we track the contour of the diaphragm in the projection image ...

BACKGROUND Computer simulations are important for validating novel image acquisition and reconstruction strategies. In cardiovascular magnetic resonance (CMR), numerical simulations need to combine anatomical information and the effects of cardiac and/or respiratory motion. To this end, a framework for realistic CMR simulations is proposed and its use for image reconstruction from undersampled ...

AbstractWe propose a lightweight, single-image super-resolution mobile device network named XCAT, and introduce Heterogeneous Group Convolution Blocks with Cross Concatenations (HXBlock). The heterogeneous split of the input channels to group convolution blocks reduces number operations, cross concatenation allows for information flow between intermediate tensors cascaded HXBlocks. concatenatio...

The most important recent development in Grid systems is the adoption of the Web services model as a basic architecture for Grid services. The result is called the Open Grid Services Architecture. This paper describes a component framework for building distributed Grid applications that is consistent with that model. The framework, called XCAT, is based on the U.S. Department of Energy Common C...

To use a variety of educational contents scattered in internet, this paper proposes concept of distributed e-learning management system. Based on functional role and system flow, this paper designs user interface framework for teacher, students and administrator. The prototype of distributed e-learning management system is also designed by REST (Representational State Transferred)

Image-guided techniques for radiation therapy have improved the precision of radiation delivery by sparing normal tissues. Cone-beam computed tomography (CBCT) has emerged as a key technique for patient positioning and target localization in radiotherapy. Here, we investigated the imaging radiation dose delivered to radiosensitive organs of a patient during CBCT scan. The 4D extended cardiac-to...

Grappa is a Grid portal effort designed to provide physicists convenient access to Grid tools and services. The ATLAS analysis and control framework, Athena, was used as the target application. Grappa provides basic Grid functionality such as resource configuration, credential testing, job submission, job monitoring, results monitoring, and preliminary integration with the ATLAS replica catalog...