Objectives: Several methods of image acquisition are accessible in dentistry. There is no overall acceptable method for image digitization so all different types of images can be comparable. The objective of this study was to compare the diagnostic accuracy of different methods of image digitization. Methods: This accuracy diagnostic test study used perceptibility curve test which first intr...

Introduction: Lung cancer is one of the most common causes of cancer-related deaths worldwide. Nowadays PET/CT plays an essential role in radiotherapy planning specially for lung tumors as it provides anatomical and functional information simultaneously that is effective in accurate tumor delineation. The optimal segmentation method has not been introduced yet, however several ...

This paper examines the effects upon steganalysis classifier performance of introducing superfluous variation into digital cover images . By using fixed steganography and steganalysis tools (Steghide 0.5.1 for former and Stegdetect 0.6 for latter), a number of different image filters are individually applied to cover images prior to the introduction of steganographic content; the effect of thes...

introduction: radiography is one of the most important diagnostic methods for evaluation of dental caries. on the other hand, the least amount of radiation along with high quality is a main gold standard. the purpose of this study was to compare the diagnostic accuracy of primax, insight radiographic films, and direct digital images (schick cmos-aps), in detection of interproximal natural carie...

Amyloidosis is a disease caused by improper three-dimensional folding of precursor proteins, which results in formation of protein aggregates, amyloid fibrils, that cause cell and organ damage. Amyloidosis localized to the respiratory tract is considered rare, with a spectrum of clinical symptoms. We report a case of a 72 year old man who presented with a laryngeal mass, found to be an amyloido...

The derivation of 3D metric information from spherical images for interactive exploration and realistic 3D modeling is receiving great attention due to their high-resolution content, large field-of-view, lowcost, easiness, rapidity and completeness. We present a methodology for accurate 3D reconstruction from spherical (panoramic) images acquired by mosaicking separated frame images captured wi...

objective: when none of digital systems and scanners is accessible and it is essential to have digitized images of conventional radiographs, digital cameras can be used. the aim of this study was to investigate whether digital images obtained by different resolutions of a digital camera are matched to the original radiographs in evaluation of caries. methods: in this diagnostic accuracy in vitr...