Aim: The aim of this in vitro study was to evaluate imaging artifacts induced by Titanium, Zirconium, Titanium-Zirconium abutments in CT, MRI and CBCT imaging modalities.Methods: A 4×8mm titanium fixture was inserted in a dry human mandible. Titanium, Zirconium and Titanium–Zirconium abutments measuring 10.5 mm in height are located on the fixture, one by one. Each abutment was scan...

Introduction: Metallic artifacts due to pacemaker/ implantable cardioverter defibrillator (ICD) leads in CT images can produce artifactual uptake in cardiac SPECT/CT images. The aim of this study was to determine the influence of the metallic artifacts due to pacemaker and ICD leads on myocardial SPECT/CT imaging. Methods: The study included 9 patients wh...

Transform coding is one of the most popular image compression techniques. However in these transformations, the image is divided into sub-blocks and each block in transformed individually. This introduces boundaries called blocking artifacts along the edges of these blocks. In this paper, we have discussed a spatial filtering method for reducing the blocking artifacts in transformed images. We ...

Intellectual and methodical support is needed to engineer, in a situational manner, methods for requirements engineering (RE), and more generally for information systems development (ISD). In this paper we define a contextual framework, based on semiotics, linguistics, and the activity theory, and apply it to analyze the coverage of support that current method engineering (ME) artifacts provide...

It is widely assumed that artifacts fall into distinct kinds. These kinds are generally identified by appeal to words-chair versus stool versus bowl versus vase, and so on. But contextual and cross-linguistic variation in what artifacts are grouped together by name raise questions about whether artifacts indeed do fall into fixed kinds. Can judgments of what artifacts really are reveal a true k...