two main forms of copd (chronic obstructive pulmonary disease) refer to a group of lung diseases that block airflow and cause a huge degree of human suffering. a new method for identifying and estimating the severity of copd from three-dimensional (3-d) pulmonary x-ray ct images would be helpful for evaluation of treatment effects and early diagnosing is presented in this paper. this method has...

ACR Appropriateness Criteria 1 Rib Fractures American College of Radiology ACR Appropriateness Criteria Clinical Condition: Rib Fractures Variant 1: Adult. Suspected rib fractures from minor blunt trauma (injury confined to ribs). Radiologic Procedure Rating Comments RRL* X-ray chest 8 Obtain PA view. ☢ X-ray rib views 5 ☢ ☢ ☢ CT chest without contrast 3 ☢ ☢ ☢ Tc-99m bone scan whole body 2 ☢ ☢ ...

ACR Appropriateness Criteria 1 Rib Fractures American College of Radiology ACR Appropriateness Criteria Clinical Condition: Rib Fractures Variant 1: Adult. Suspected rib fractures from minor blunt trauma (injury confined to ribs). Radiologic Procedure Rating Comments RRL* X-ray chest 8 Obtain PA view. ☢ X-ray rib views 5 ☢ ☢ ☢ CT chest without IV contrast 3 ☢ ☢ ☢ Tc-99m bone scan whole body 2 ☢...

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...

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...

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...

PURPOSE The authors present initial progress toward a clinically compatible x-ray phase contrast CT system, using glancing-angle x-ray grating interferometry to provide high contrast soft tissue images at estimated by computer simulation dose levels comparable to conventional absorption based CT. METHODS DPC-CT scans of a joint phantom and of soft tissues were performed in order to answer sev...

BACKGROUND Hybrid imaging combines nuclear medicine imaging such as single photon emission computed tomography (SPECT) or positron emission tomography (PET) with computed tomography (CT). Through this hybrid design, scanned patients accumulate radiation exposure from both applications. Imaging modalities have been the subject of long-term optimization efforts, focusing on diagnostic application...

BACKGROUND There are differences in the reference diagnostic levels for the computed tomography (CT) of the chest as cited in different literature sources. The doses are expressed either in weighted CT dose index (CTDIVOL) used to express the dose per slice, dose-length product (DLP), and effective dose (E). The purpose of this study was to assess the radiation dose used in Low Dose Computer To...