Analytic Comparison Between X-Ray Fluorescence CT and K-Edge CT

Attenuation correction of myocardial SPECT images with X-ray CT: effects of registration errors between X-ray CT and SPECT.

PURPOSE Attenuation correction with an X-ray CT image is a new method to correct attenuation on SPECT imaging, but the effect of the registration errors between CT and SPECT images is unclear. In this study, we investigated the effects of the registration errors on myocardial SPECT, analyzing data from a phantom and a human volunteer. METHODS Registerion (fusion) of the X-ray CT and SPECT ima...

Artifacts in X-ray CT

Anatomical image-based rigid registration between fluoroscopic X-ray and CT: methods comparison and experimental results

This paper describes a practical, whole system approach to rigid registration between preoperative CT and intraoperative X-rays obtained with a tracked C-arm and demonstrates its efficacy experimentally. Our approach is generic, targeted to orthopaedic surgery, and includes fluoroscopic X-ray calibration, image distortion correction, optical tracking, and 2D/3D image registration. For 2D/3D ima...

Advanced X-ray computed tomography methods: High resolution CT, quantitative CT, 4DCT and phase contrast CT

During the last years, a number of novel X-ray imaging and data processing methods have been developed. This work gives an overview of some recent CT-developments: 1) High resolution CT: State of the art laboratory CT-systems are able to reach resolutions down to 0.7 μm (or even lower) and voxels sizes down to 50 nm. Several applications of high-resolution CT are presented and discussed. 2) Qua...

Iterative reconstruction methods in X-ray CT.

Iterative reconstruction (IR) methods have recently re-emerged in transmission x-ray computed tomography (CT). They were successfully used in the early years of CT, but given up when the amount of measured data increased because of the higher computational demands of IR compared to analytical methods. The availability of large computational capacities in normal workstations and the ongoing effo...