X-ray breast computed tomography (breast CT) was developed by some research groups to overcome the limitations of mammography. Breast CT is expected to be an effective diagnostic tool because it can generate threedimensional images of a breast. However, the spatial resolution of the existing system is not satisfactory for identifying microcalcifications within the breast. The purpose of this st...

The encapsulation of bismuth as BiOCl/Bi2O3 within ultra-short (ca. 50 nm) single-walled carbon nanocapsules (US-tubes) has been achieved. The Bi@US-tubes have been characterized by high-resolution transmission electron microscopy (HR-TEM), energy-dispersive X-ray spectroscopy (EDS), thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. Bi@US-tubes ha...

in the present study application of x-ray computed tomography as a nondestructive technique for estimation of some qualitative parameters of pomegranate fruit was studied. for this purpose, three local cultivars of pomegranate fruit of fars province, iran that included; rabab malas, rabab torsh and khani kazeroon were used. the x-ray ct images of pomegranate fruits were prepared using ct-scan d...

UNLABELLED BACKGROUND Unspecific pain of the hand/wrist is a diagnostic challenge. Radiographs and planar bone scan are useful diagnostic tools in patients with unspecific wrist pain. Both modalities are deficient, either by not presenting metabolic disorders or due to inadequate anatomical resolution. Single photon emission computed tomography/computed tomography (SPECT/CT) claims to fuse b...

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...

  Background: The sporadic cases of radiation-activated multiple sclerosis (MS) has been previously described, with a few studies focused on the relationship between radiation and the risk of MS. The aim of our study was to evaluate the association between history of X-ray radiation and MS.   Methods : This case-control study was conducted on 150 individuals including 65 MS patients and 85 age-...

Statistical methods for tomographic image reconstruction have shown considerable potential for improving image quality in X-ray CT. Penalized-likelihood (PL) image reconstruction methods require maximizing an objective function that is based on the log-likelihood of the sinogram measurements and on a roughness penalty function to control noise. In transmission tomography, PL methods (and MAP me...

Kisner, Sherman J. Ph.D., Purdue University, December 2013. Image Reconstruction for X-ray Computed Tomography in Security Screening Applications. Major Professor: Charles A. Bouman. X-ray tomographic systems have increasingly widespread use in security screening applications. For example, most major airports now utilize X-ray CT systems for efficient screening of baggage and cargo. While decad...

Objective: Objective of the study was to evaluate the diagnostic yield of X-rays taking CT scan as gold standard in acute and chronic sinusitis. Study Design:Validation study. Place and Duration of study: The study was conducted in the Radiology Department CMH Rawalpindi, from 1st Aug 2007 to 31st July 2008. Patients and Methods: This study involved 95 patients of both genders above 18 years of...