OBJECTIVES In this study, we aimed to validate the accuracy of computed tomography-based attenuation correction (CTAC), using the bilinear scaling method. METHODS The measured attenuation coefficient (μm) was compared to the theoretical attenuation coefficient (μt), using four different CT scanners and an RMI 467 phantom. The effective energy of CT beam X-rays was calculated, using the alumin...

Dual Energy CT in Clinical Practice, Johnson, T., Fink, C., Schönberg, S. O., Reiser, M. F., Springer-Verlag, Berlin, Heidelberg, 2011. Hardcover, 219 pp. Price: $239.00. ISBN: 978-3-642-01739-1.

Gout is characterized by an inflammatory response that is initiated by the precipitation of monosodium urate within and surrounding the joints as well as the soft tissue. This is the most common form of inflammatory arthritis and has been showing increasing incidence over recent years in association with increased incidence of the metabolic syndrome 1 . Arthritis Ireland believe the same increa...

Nuclear Medicine was established in Myanmar in 1963 by Dr Soe Myint and International Atomic Energy expert Dr R. Hochel at Yangon General Hospital. Nuclear medicine diagnostic and therapeutic services started with Probe Scintillation Detector Systems and rectilinear scanner. In the early stage, many Nuclear Medicine specialists from the International Atomic Energy Agency (IAEA) spent some time ...

Dual-energy CT (DECT) is accomplished by near simultaneous imaging at two energy levels, typically 80 kV and 140 kV, using scanners that either employ rapid kV switching or have two orthogonal sets of X-ray tunes and detectors mounted in the gantry. Attenuation properties differ at the two energy levels, which allow the DECT to differentiate and quantify certain substances such as water, calciu...

The Research about Advanced Multi Material Decomposition of Dual energy in Computed Tomography image to find the liver diseases. The Existing system Multi material Decomposition(MMD) to find the liver disease using single energy. It was use Virtual Unenhancement algorithm. which is digitally removal of the effect of contrast agents from contrast-enhanced dual-energy CT exams. In proposed Method...

Introduction: The purpose of the current study was to investigate the effect of X-ray spectra on the sensitivity of a polymer gel dosimeter imaged with a conventional computed tomography (CT) scanner. Material and Methods: The whole process of CT imaging of an irradiated polymer gel was simulated by MCNPX Monte Carlo (MC) code. The imaging of polyacrylamide gel was accomplished by means of a co...

Jeffrey Ashton1, Cristian Badea2, Jennifer West1 1Duke University, Biomedical Engineering Department 2Duke University Medical Center, Department of Radiology Statement of Purpose: X-ray computed tomography (CT) is one of the most useful imaging tools for modern clinicians. However, molecular imaging with CT is not feasible with existing contrast agents, so clinicians must instead rely on other ...