Respiratory motion compensation in interventional liver SPECT using simultaneous fluoroscopic and nuclear imaging

Compensation of Cross-Contamination in Simultaneous 201Tl/99mTc Myocardial Perfusion SPECT Imaging

Introduction: It is a common protocol to use 201Tl for the rest and 99mTc for the stress cardiac SPECT imaging. Theoretically, both types of imaging may be performed simultaneously using different energy windows for each radionuclide. However, a potential limitation is the cross-contamination of scattered photons from 99mTc and collimator X-rays into the 201Tl energy window. We used a middle en...

Respiratory 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...

Multimodality calibration for simultaneous fluoroscopic and nuclear imaging

BACKGROUND Simultaneous real-time fluoroscopic and nuclear imaging could benefit image-guided (oncological) procedures. To this end, a hybrid modality is currently being developed by our group, by combining a c-arm with a gamma camera and a four-pinhole collimator. Accurate determination of the system parameters that describe the position of the x-ray tube, x-ray detector, gamma camera, and col...

Compensation of Respiratory Motion in Cardiac Imaging

F/H Simultaneous 3D Radial Imaging of Atherosclerotic Rabbits Using Self-Navigated Respiratory Motion Compensation

Introduction MR molecular imaging of low doses of tracer material often requires long scan times and makes motion compensation strategies desirable. 3D radial imaging with golden section profile interleaving allows auto-navigated motion compensation [1,2]. Here, it is applied to simultaneous F/H imaging of the aorta of atherosclerotic rabbits after systemic administration of F-based angiogenesi...