Conventional x-ray computed tomography (CT) produces a single volumetric image that represents the spatially variant linear x-ray attenuation coefficient of an object. However, in many situations, differences in the x-ray attenuation properties of soft tissues are very small and difficult to measure in conventional x-ray imaging. In this work, we investigate an analyzer-based imaging method, ca...

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...

background and aims. cone-beam computed tomography (cbct) is an imaging system which has many advantages over computed tomography (ct). in ct scan, hounsfield unit (hu) is proportional to the degree of x-ray attenuation by the tissue. in cbct, the degree of x-ray attenuation is shown by gray scale (voxel value). the aim of the present study was to investigate the relationship between gray scale...

X-ray computed tomography (CT) is a non-destructive, radiographic scanning technique that enables the visualisation of both the internal geometry and the composition of a workpiece; X-ray CT is therefore well suited for non-destructive inspection tasks. Several physical processes reduce the quality of CT images, and therefore influence both qualitative and quantitative analyses made from CT dat...

OBJECTIVE Computed tomography (CT), rather than conventional 2-dimensional radiography, was used to scan and measure pelvic parameters. The results were compared with measurements using X-ray. METHODS Pelvic parameters were measured using both CT and X-ray in 254 patients who underwent both abdomino-pelvic CT and X-ray at the pelvic site. We assessed the similarity of the pelvic parameters be...

Proton computed tomography (CT) has been described as a solution for imaging the proton stopping power of patient tissues, therefore reducing the uncertainty of the conversion of x-ray CT images to relative stopping power (RSP) maps and its associated margins. This study aimed to investigate this assertion under the assumption of ideal detection systems. We have developed a Monte Carlo framewor...

Radiologic Procedure Rating Comments RRL* CT abdomen and pelvis without and with IV contrast 2 ☢ ☢ ☢ ☢ X-ray abdomen 2 ☢ ☢ CT abdomen and pelvis without IV contrast 2 ☢ ☢ ☢ ☢ CT abdomen and pelvis with IV contrast 2 ☢ ☢ ☢ ☢ X-ray IV contrast enema 2 ☢ ☢ ☢ X-ray cystography 2 ☢ ☢ ☢ MRI pelvis without and with IV contrast 2 MRI may be indicated if urethral diverticulum is suspected. O MRI pelvis ...