نتایج جستجو برای: direct digital subtraction radiography

تعداد نتایج: 746259  

Journal: :Journal of the College of Physicians and Surgeons--Pakistan : JCPSP 2008
Waseem Akhtar Mubashir Aslam Arif Ali Kashif Mirza Nadeem Ahmad

OBJECTIVE To determine the film-retake rates and causes in digital radiography comparison to conventional X-rays method. STUDY DESIGN Comparative study. PLACE AND DURATION OF STUDY Radiology Department, Aga Khan University Hospital, Karachi, from January 2004 to December 2006. PATIENTS AND METHODS X-rays of different body parts, conducted during the year 2004, with conventional radiograph...

2011
Belma Muhamedagic Lejla Muhamedagic

Belma Muhamedagic, Lejla Muhamedagic Faculty of Medicine, University of Sarajevo, Bosnia and Herzegovina ography-RVG, Trophy Radiologie, Croissy Beaubourg, France [now Trophy, A Kodak Company, Rochester, N.Y.]). RVG is modern diagnostic method based on use of digital roentgen. Principle is use of so called CCD chip in RVG sensor (Figure 1) that put in patient’s mouth (3). The first dental digit...

Journal: :Physics in medicine and biology 1997
M J Yaffe J A Rowlands

Digital radiography offers the potential of improved image quality as well as providing opportunities for advances in medical image management, computer-aided diagnosis and teleradiology. Image quality is intimately linked to the precise and accurate acquisition of information from the x-ray beam transmitted by the patient, i.e. to the performance of the x-ray detector. Detectors for digital ra...

2010
Maria do Carmo Machado GUIMARÃES Euloir PASSANEZI Adriana Campos Passanezi SANT’ANA Sebastião Luiz Aguiar GREGHI Mario TABA JUNIOR

OBJECTIVES This study assessed the bone density gain and its relationship with the periodontal clinical parameters in a case series of a regenerative therapy procedure. MATERIAL AND METHODS Using a split-mouth study design, 10 pairs of infrabony defects from 15 patients were treated with a pool of bovine bone morphogenetic proteins associated with collagen membrane (test sites) or collagen me...

Journal: :Dento maxillo facial radiology 2006
P Güneri S Gögüs Z Tuğsel A Ozturk C Gungor H Boyacioğlu

OBJECTIVES The aim of this study was to test and compare the efficacy of software developed recently for digital subtraction radiography (DSR) in vivo. METHODS An algorithm performing both manual and automated image reconstructions and contrast correction was developed for the manipulation of radiographic images. Pre- and post-operative radiographic images of ten patients were obtained and th...

Journal: :iranian journal of radiology 0
solmaz valizadeh department of oral and maxillofacial radiology, school of dentistry, shahid beheshti university of medical sciences, tehran, iran mostafa goodini department of endodontics, school of dentistry, shahid beheshti university of medical sciences, tehran, iran sara ehsani dental research center, research institute of dental sciences, shahid beheshti university of medical sciences, tehran, iran; dental research center, research institute of dental sciences, shahid beheshti university of medical sciences, tehran, iran. tel: +98-2122413897, fax: +98-2122427753 hadis mohseni department of computer engineering, shahid bahonar university of kerman, kerman, iran fateme azimi department of oral and maxillofacial radiology, school of dentistry, shahid beheshti university of medical sciences, tehran, iran hooman bakhshandeh cardiovascular intervention research center, rajaie cardiovascular medical and research center, tehran university of medical sciences, tehran, iran

conclusions the designed software was able to detect a significant number of dentin caries and acceptable measuring of the depth of carious lesions in enamel and dentin. however, the software had limited ability in detecting enamel lesions. background radiographs, adjunct to clinical examination are always valuable complementary methods for dental caries detection. recently, progressing in digi...

Journal: :journal of dentomaxillofacil radiology, pathology and surgery 0
najmeh movahhedian department of oral and maxillofacial radiology, faculty of dentistry, shiraz university of medial science, shiraz, iran leila khojastepour department of oral and maxillofacial radiology, faculty of dentistry, shiraz university of medial science, shiraz, iran fahimeh mortazavi department of oral and maxillofacial radiology, faculty of dentistry, shiraz university of medial science, shiraz, iran mohammad sadeghbirjandi

introdouction:the study aimed to compare the accuracy of proximal caries detection by dental practitioners using two different systems, direct digital system and conventional films, under routine environmental conditions. materials and methods: eleven extracted human posterior teeth were mounted on wax frames and were exposed using the direct digital system and conventional films. seventy-four ...

Journal: :avicenna journal of dental research 0
sanam mirbeygi department of oral and maxilofacial radiology, shahid sadoughi university of medical sciences, yazd, ir iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی شهید صدوقی یزد (shahid sadooghi university of medical sciences) maryam kazemipoor department of endodontics, shahid sadoughi university of medical sciences, yazd, ir iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی شهید صدوقی یزد (shahid sadooghi university of medical sciences) sahar ghane department of oral and maxillofacial rafiology, rafsanjan university of medical science, rafsanjan, ir iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی رفسنجان (rafsanjan university of medical sciences) simin shafiei department of oral and maxilofacial radiology, shahid sadoughi university of medical sciences, yazd, ir iran; department of oral and maxilofacial radiology, school of dentistry, shahid sadoughi university of medical sciences, emam st. dahe fajr blv., yazd, ir iran. tel: +98-3536255881-4; +98-9126887642, fax: +98-3536250344سازمان اصلی تایید شده: دانشگاه علوم پزشکی شهید صدوقی یزد (shahid sadooghi university of medical sciences)

conclusions according to the results of this study, the accuracy of the file length in improved digital images showed no significant difference in comparison with the actual file length. materials and methods using an analytical-diagnostic method, an access cavity was prepared in 36 mandibular and maxillary premolar teeth. a file # 15 was inserted into the canal of each tooth until the tip of t...

Journal: :iranian endodontic journal 0
abbas mesgarani sina haghanifar maryam ehsani samereh dokhte yaghub ali bijani

introduction: external root resorption (err) is associated with physiological and pathological dissolution of mineralized tissues by clastic cells and radiography is one of the most important methods in its diagnosis. the aim of this experimental study was to evaluate the accuracy of conventional intraoral radiography (cr) in comparison with digital radiographic techniques, i.e. charge-coupled ...

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