نتایج جستجو برای: conventional radiography

تعداد نتایج: 276463  

Journal: :The British journal of radiology 2001
L J Cesar B A Schueler F E Zink T R Daly J P Taubel L L Jorgenson

Artefacts on radiographic images are distracting and may compromise accurate diagnosis. Although most artefacts that occur in conventional radiography have become familiar, computed radiography (CR) systems produce artefacts that differ from those found in conventional radiography. We have encountered a variety of artefacts in CR images that were produced from four different models plate reader...

2011
Seiedeh Tahereh Mohtavipour Zahra Dalili Nasim Gheshlaghi Azar

PURPOSE The purpose of this study was to compare the conventional and digital radiography in the estimation of working length in mandibular molars. MATERIALS AND METHODS Sixty molar teeth were selected and divided into three groups in the basis of canal curves (0-15°, 15-30°, >30°). After the placement of a 15 K-file, radiographs were taken with a conventional film (F-speed) and a digital sen...

2013
Mahkameh Moshfeghi Soodabeh Sadat Sajadi Sepideh Sajadi Majid Shahbazian

OBJECTIVE Successful endodontic therapy depends on adequate mechanical and chemical debridement of the canal which requires knowledge of the canal morphology. Conventional radiography has been used to evaluate the canal type; however, direct digital radiography has recently been practiced for this purpose due to the shortcomings of conventional radiography. The aim of the present study was to c...

A Tabibi F Falahzadeh H Modir Falah M tofangchiha SH Safarzadeh

Background & Aims: Conventional radiography is used for the diagnosis of problems such as dental caries and failure in root canal therapy. The diagnosis accuracy of conventional radiography is acceptable in the evaluation of anatomical and pathological structures. However, it seems that by using digital radiography we can obtain more information in this field. The aim of this study is to compar...

Journal: :Acta radiologica 2011
David Collin Dennis Dunker Jan H Göthlin Mats Geijer

BACKGROUND Conventional radiography is insufficient for diagnosis in a small but not unimportant number of hip fractures, and secondary imaging with computed tomography (CT) or magnetic resonance imaging (MRI) is warranted. There are no convincing observer variation studies performed for conventional radiography or CT in occult fractures, and no large materials for MRI. PURPOSE To assess obse...

2017
Sadaksharam Jayachandran

X‐rays were discovered in 1895 by Wilhelm Roentgen. Digital radiology has overtaken conventional screen‐film radiography since it was introduced in the mid‐1980s.[1] Digital imaging uses sensor of solid‐state, and information is presented and stored as an image using a computer. The dawn of the digital era in dental radiography came in 1987 with the first digital radiography system called radio...

2014
J. Knoop J. Dekker J. P. Klein M. van der Leeden M. van der Esch D. Reiding R. E. Voorneman M. Gerritsen L. D. Roorda

Biomechanical factors and physical examination findings in osteoarthritis of the knee: associations with tissue abnormalities assessed by conventional radiography and high-resolution 3 T magnetic resonance imaging Abstract Introduction. We aimed to explore the associations between knee osteoarthritis (OA)-related tissue abnormalities assessed by conventional radiography (CR) and high resolution...

Journal: :Brazilian dental journal 2017
Shahin Kasraei Abbas Shokri Jalal Poorolajal Samira Khajeh Hamid Rahmani

Secondary caries is the most common cause of dental restoration failures. This study aimed to compare the diagnostic accuracy of conventional and digital intraoral radiography and cone beam computed tomography (CBCT) for detection of recurrent caries around composite restorations. mesio-occluso-distal (MOD) cavities were prepared using bur on 45 extracted sound human molar teeth. The teeth were...

Journal: :AJNR. American journal of neuroradiology 1996
C G Diederichs W G Engelke B Richter K P Hermann J W Oestmann

We evaluated the feasibility of performing preoperative spiral CT of the maxilla and mandible with a radiation dose similar to that used for conventional panoramic radiography. The skin entrance doses of radiation used for spiral CT (collimation, 1 mm; pitch, 2; tube voltage, 80 kV; tube current, 40 mA) and for panoramic radiography (75 kV, 8 mA, 15 seconds) were measured in one patient by usin...

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