Purpose: Compton spectroscopy is a widely accepted tool for measuring the primary X-ray spectra of a diagnostic computed tomography (CT) system. The aim of this work is to spectroscopically detect CT X-ray photons subjected to 90-degree Compton scattering for accurate modelling of CT beam-shaping filtration, which necessary for computation of radiation exposure and for other research applicatio...

Radiologic Procedure Rating Comments RRL* Rule Out Bone Metastases Tc-99m bone scan whole body 2 ☢ ☢ ☢ X-ray radiographic survey whole body 2 ☢ ☢ ☢ FDG-PET/CT whole body 2 ☢ ☢ ☢ ☢ Rule Out Thoracic Metastases X-ray chest 2 ☢ CT chest without contrast 2 ☢ ☢ ☢ CT chest with contrast 2 ☢ ☢ ☢ CT chest without and with contrast 2 ☢ ☢ ☢ X-ray tomography chest 2 ☢ ☢ FDG-PET/CT whole body 2 ☢ ☢ ☢ ☢ Rul...

Current computed tomography (CT) scanners, including micro-CT scanners, utilize a point x-ray source. As we target higher and higher spatial resolutions, the reduced x-ray focal spot size limits the temporal and contrast resolutions achievable. To overcome this limitation, in this paper we propose to use a line-shaped x-ray source so that many more photons can be generated, given a data acquisi...

For a micro-Computed Tomography (Micro-CT) system, the microfocus X-ray tube is an essential component because the spatial resolution of CT images, in theory, is mainly determined by the size and stability of the X-ray focal spot of the microfocus X-ray tube. However, many factors, including voltage fluctuations, mechanical vibrations, and temperature changes, can cause the size and the stabili...

X-ray computed tomography (CT) is a popular tool for non-destructively producing cross-sectional and volumetric images of physical objects[1]. In this technology, an X-ray source and a detector are mounted on a rotating gantry, and X-ray images from many different angles are acquired and then passed to a reconstruction program to create volumetric images. Unfortunately, the gantry and the rotat...

conclusions performing the routine chest ct in high-energy blunt trauma patients (with a mean injury severity of 9), although leading to the diagnosis of some occult injuries, has no impact on the outcome and does not decrease the in-hospital stay and icu admission time. it seems that performing the routine chest ct in these patients may lead to overtreatment of nonsignificant injuries. the dec...

AIM To evaluate the diagnostic sensitivity and accuracy and the cost-effectiveness of this technique in the detection of gastroenteropancreatic carcinoid tumors and their metastases in comparison with conventional imaging methods. METHODS Somatostatin receptor scintigraphy (SRS) was performed in 24 patients with confirmed carcinoids and 7 under investigation. The results were compared with th...